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personal monitoring and field checks. Compare supported gases, diffusion or pumped sampling, and model-specific logging and communication options.",[],[686],{"id":669,"heading":687,"paragraphs":688},"Selection notes",[689,690,691,692],"Start with the required gases and measuring ranges; confirm the combination for the selected model.","Compare diffusion and pumped sampling, then check size and weight for the task.","Review data storage and communication options, keeping standard and optional functions separate.","Check operating conditions, ingress protection and certificate scope on the product page.",[],{"title":682,"description":695,"ogTitle":696,"ogDescription":695},"Compare portable gas detectors by gas capability, diffusion or pumped sampling, and model-specific communication options. View specifications and request a quote.","Portable Gas Detectors | Eranntex",10,{"id":699,"url":700,"alt":701,"localizedAlt":702,"width":704,"height":704,"mimeType":705,"roles":706},"media-ms104k-l-1","\u002Fimages\u002Fproducts\u002Feranntex-pump-suction-single-gas-detector-btyq-ms104k-l-front-view.webp","Front view of an Eranntex BTYQ-MS104K-L portable gas detector.",{"zh-CN":703},"逸云天 BTYQ-MS104K-L 便携式气体检测仪正面图。",800,"image\u002Fwebp",[707,708,709],"card","hero","gallery",{"id":121,"slug":711,"name":712,"description":713,"marketContent":714,"displayOrder":746,"media":747},"transportable-gas-detection","Transportable Gas Detection Systems","Hand-carried multi-gas analyzers and deployable area monitors for temporary site monitoring and field measurements.",[715,731],{"market":315,"locale":316,"publication":716,"displayName":717,"h1":717,"intro":718,"sections":719,"selectionGuidance":720,"featuredResourceIds":727,"seo":728},{"status":663,"indexable":10},"移动式气体检测系统","依据测量任务、采样方式、供电要求与资料记载的通讯选项进行选择。",[],[721],{"id":669,"heading":670,"paragraphs":722},[723,724,725,726],"如需泵吸式气体分析，请参考 PTM600-S 的参数；如需可部署监测，请参考 PTM600-S2 的参数。","请确认所选型号的气体、量程与预期组合。","部署前请核对采样、供电以及携带或安装要求。","视频与通讯功能请按型号核对；两款仪器的选项并不相同。",[],{"title":717,"description":729,"ogTitle":730,"ogDescription":729},"了解 PTM600-S 气体分析与 PTM600-S2 可部署监测。按现场项目对比采样、供电与通讯要求。","移动式气体检测系统 | 逸云天",{"market":17,"locale":18,"publication":732,"displayName":712,"h1":712,"intro":733,"sections":734,"selectionGuidance":735,"featuredResourceIds":742,"seo":743},{"status":663,"indexable":10},"Choose based on the measurement task, sampling method, power requirements and documented communication options.",[],[736],{"id":669,"heading":687,"paragraphs":737},[738,739,740,741],"Use the PTM600-S specifications to assess pumped gas analysis and the PTM600-S2 specifications to assess deployable monitoring.","Confirm gases, ranges and the intended combination for the selected model.","Check sampling, power and carrying or mounting requirements before deployment.","Review video and communication functions by model; do not assume the two instruments share the same options.",[],{"title":712,"description":744,"ogTitle":745,"ogDescription":744},"Explore PTM600-S gas analysis and PTM600-S2 deployable monitoring. Compare sampling, power and communication requirements for your field project.","Transportable Gas Detection Systems | Eranntex",20,{"id":748,"url":749,"alt":750,"localizedAlt":751,"width":704,"height":704,"mimeType":705,"roles":753},"media-ptm600-s-1","\u002Fimages\u002Fproducts\u002Feranntex-portable-multi-gas-analyzer-btyq-ptm600-s-front-view.webp","Front view of the Eranntex BTYQ-PTM600-S portable pump-suction multi-gas analyzer with rugged orange casing, Android smart display, and support for 1 to 24 gases.",{"zh-CN":752},"逸云天 BTYQ-PTM600-S 便携泵吸式多气体分析仪正面图：橙色加固外壳、安卓智能显示屏，支持 1 至 24 种气体。",[707,708,709],{"id":101,"slug":755,"name":756,"description":757,"marketContent":758,"displayOrder":11,"media":793},"fixed-gas-detection","Fixed Gas Detection","Fixed-point detectors and transmitters for continuous, 24\u002F7 safety monitoring across industrial facilities.",[759,776],{"market":315,"locale":316,"publication":760,"displayName":761,"h1":761,"intro":762,"sections":763,"selectionGuidance":764,"featuredResourceIds":771,"seo":772},{"status":663,"indexable":10},"固定式气体检测仪","为工业监测装置选择固定式气体检测仪。请结合现场系统，对比气体能力、传感选项、本地操作与信号输出。",[],[765],{"id":669,"heading":670,"paragraphs":766},[767,768,769,770],"请说明目标气体与量程，再确认所选检测仪的配置。","对比资料记载的传感选项与本地操作要求。","使信号输出与控制系统相匹配；可选接口请单独核对。","请结合预期安装位置，核对环境限值与证书适用范围。",[],{"title":773,"description":774,"ogTitle":775,"ogDescription":774},"工业监测用固定式气体检测仪","按气体能力、传感选项、本地操作与信号输出选择固定式气体检测仪，并结合您的工业装置核对各型号的技术规格。","工业监测用固定式气体检测仪 | 逸云天",{"market":17,"locale":18,"publication":777,"displayName":778,"h1":778,"intro":779,"sections":780,"selectionGuidance":781,"featuredResourceIds":788,"seo":789},{"status":663,"indexable":10},"Fixed Gas Detectors","Select fixed gas detectors for industrial monitoring installations. Compare gas capability, sensing options, local operation and signal outputs for the intended site system.",[],[782],{"id":669,"heading":687,"paragraphs":783},[784,785,786,787],"Specify the target gases and ranges, then confirm the configuration for the selected detector.","Compare documented sensing options and local operation requirements.","Match signal outputs to the control system; review optional interfaces separately.","Check environmental limits and certificate scope for the intended installation.",[],{"title":790,"description":791,"ogTitle":792,"ogDescription":791},"Fixed Gas Detectors for Industrial Monitoring","Select fixed gas detectors by gas capability, sensing options, local operation and signal outputs. Review model specifications for your industrial installation.","Fixed Gas Detectors for Industrial Monitoring | Eranntex",{"id":794,"url":795,"alt":796,"localizedAlt":797,"width":799,"height":799,"mimeType":705,"roles":800},"media-mic-500s-1","\u002Fimages\u002Fproducts\u002Feranntex-fixed-gas-detector-gtyq-mic-500s-alarm-strobe-front-view.webp","Front view of the Eranntex GTYQ-MIC-500S fixed flameproof single gas detector featuring a 1.7-inch color LCD display and integrated audio-visual alarm strobe.",{"zh-CN":798},"逸云天 GTYQ-MIC-500S 固定式隔爆型单气体检测仪正面图，配 1.7 英寸彩色液晶显示屏和一体式声光报警灯。",700,[707,708,709],{"id":109,"slug":802,"name":803,"description":804,"marketContent":805,"displayOrder":840,"media":841},"gas-alarm-controllers","Gas Detection Controllers","Control and annunciation equipment for gas detection installations.",[806,823],{"market":315,"locale":316,"publication":807,"displayName":808,"h1":808,"intro":809,"sections":810,"selectionGuidance":811,"featuredResourceIds":818,"seo":819},{"status":663,"indexable":10},"气体报警控制器","选择用于探测器信号采集、本地显示与报警输出的气体报警控制器。按探测器网络的输入容量、信号类型与继电器要求进行匹配。",[],[812],{"id":669,"heading":670,"paragraphs":813},[814,815,816,817],"请统计所需探测器输入数量，并区分模拟量输入与 RS485 网络容量。","请核对所选型号的标配与扩展输入配置。","请对照现场控制要求确认继电器输出与可选接口。","确定控制器前，请核对安装、供电与外壳要求。",[],{"title":820,"description":821,"ogTitle":822,"ogDescription":821},"气体报警控制器与控制单元","按模拟量与 RS485 输入、继电器输出、安装与集成选项对比气体报警控制器，为您的探测器网络确定控制器。","气体报警控制器与控制单元 | 逸云天",{"market":17,"locale":18,"publication":824,"displayName":825,"h1":825,"intro":826,"sections":827,"selectionGuidance":828,"featuredResourceIds":835,"seo":836},{"status":663,"indexable":10},"Gas Alarm Controllers","Choose gas alarm controllers for detector signal collection, local display and alarm outputs. Match input capacity, signal types and relay requirements to the detector network.",[],[829],{"id":669,"heading":687,"paragraphs":830},[831,832,833,834],"Count the required detector inputs and distinguish analog inputs from RS485 network capacity.","Check the selected model’s standard and expanded input arrangements.","Confirm relay outputs and optional interfaces against the site control requirements.","Review mounting, power and enclosure requirements before specifying the controller.",[],{"title":837,"description":838,"ogTitle":839,"ogDescription":838},"Gas Alarm Controllers and Control Units","Compare gas alarm controllers by analog and RS485 inputs, relay outputs, mounting and integration options. Specify a controller for your detector network.","Gas Alarm Controllers and Control Units | Eranntex",40,{"id":842,"url":843,"alt":844,"localizedAlt":845,"width":704,"height":704,"mimeType":705,"roles":847},"media-mic-1000-1","\u002Fimages\u002Fproducts\u002Feranntex-gas-alarm-controller-mic-1000-wall-mount-front-view.webp","Front view of the Eranntex MIC-1000 wall-mounted gas alarm controller featuring a stainless steel enclosure, 3.5-inch color display, status indicators, and multi-channel input support.",{"zh-CN":846},"逸云天 MIC-1000 壁挂式气体报警控制器正面图：不锈钢机箱、3.5 英寸彩色显示屏和状态指示灯，支持多通道输入。",[707,708,709],{"id":113,"slug":849,"name":850,"description":851,"marketContent":852,"displayOrder":887,"media":888},"gas-monitoring-analysis-systems","Gas Monitoring & Analysis Systems","Online analysis, environmental monitoring and sample-conditioning systems.",[853,870],{"market":315,"locale":316,"publication":854,"displayName":855,"h1":855,"intro":856,"sections":857,"selectionGuidance":858,"featuredResourceIds":865,"seo":866},{"status":663,"indexable":10},"气体监测与分析系统","了解在线气体分析仪、样气处理系统，以及环境空气与异味监测设备。请围绕测量任务与样气条件选择系统类别。",[],[859],{"id":669,"heading":670,"paragraphs":860},[861,862,863,864],"先明确任务：气体分析、样气处理、环境空气监测或异味监测。","请说明所需气体或测量因子，并确认项目配置。","适用时请核对采样温度、湿度、距离与样气处理要求。","请在所选系统的产品页核对输出、供电与安装要求。",[],{"title":867,"description":868,"ogTitle":869,"ogDescription":868},"在线气体分析与监测系统","浏览在线气体分析仪、样气处理设备，以及空气与异味监测系统，核对测量范围与项目要求。","在线气体分析与监测系统 | 逸云天",{"market":17,"locale":18,"publication":871,"displayName":872,"h1":872,"intro":873,"sections":874,"selectionGuidance":875,"featuredResourceIds":882,"seo":883},{"status":663,"indexable":10},"Gas Monitoring and Analysis Systems","Explore online gas analyzers, sample-conditioning systems, and ambient air and odor monitoring equipment. Choose the system family around the measurement task and sample conditions.",[],[876],{"id":669,"heading":687,"paragraphs":877},[878,879,880,881],"Start with the task: gas analysis, sample conditioning, ambient air monitoring or odor monitoring.","Specify the required gases or measurement factors and confirm the project configuration.","Review sampling temperature, humidity, distance and conditioning requirements where applicable.","Check outputs, power and installation requirements on the selected system’s product page.",[],{"title":884,"description":885,"ogTitle":886,"ogDescription":885},"Online Gas Analysis and Monitoring Systems","Browse online gas analyzers, sample-conditioning equipment, and air and odor monitoring systems. Review measurement scope and project requirements.","Online Gas Analysis and Monitoring Systems | Eranntex",50,{"id":889,"url":890,"alt":891,"localizedAlt":892,"width":894,"height":894,"mimeType":705,"roles":895},"media-doas-2000-1","\u002Fimages\u002Fproducts\u002Feranntex-online-doas-gas-analyzer-cabinet-doas-2000-front-view.webp","Perspective front view of the Eranntex DOAS-2000 online UV differential absorption spectrometer gas analyzer cabinet featuring a top color touchscreen and dual access panels.",{"zh-CN":893},"逸云天 DOAS-2000 在线紫外差分吸收光谱气体分析仪机柜的正面透视图，顶部为彩色触摸屏，正面有两块检修面板。",1000,[707,708,709],{"id":105,"slug":897,"name":898,"description":899,"marketContent":900,"displayOrder":935,"media":936},"flame-detection","Flame Detection","Industrial flame detectors for fixed fire and process-risk monitoring.",[901,918],{"market":315,"locale":316,"publication":902,"displayName":903,"h1":903,"intro":904,"sections":905,"selectionGuidance":906,"featuredResourceIds":913,"seo":914},{"status":663,"indexable":10},"工业火焰探测器","浏览 MIC-200 红外与紫外\u002F红外复合火焰探测器。请按预期安装位置对比探测配置、资料记载的探测距离与响应，以及输出要求。",[],[907],{"id":669,"heading":670,"paragraphs":908},[909,910,911,912],"请对比红外与紫外\u002F红外复合两种探测配置。","探测距离与响应需结合资料记载的目标物与试验条件一并查看。","请对照接收系统核对信号输出与安装要求。","请确认所选型号的证书适用范围及其对现场的适用性。",[],{"title":915,"description":916,"ogTitle":917,"ogDescription":916},"工业红外与紫外\u002F红外火焰探测器","按探测配置、资料记载的距离、响应与输出，对比适用于工业装置的 MIC-200 红外与紫外\u002F红外火焰探测器。","工业红外与紫外\u002F红外火焰探测器 | 逸云天",{"market":17,"locale":18,"publication":919,"displayName":920,"h1":920,"intro":921,"sections":922,"selectionGuidance":923,"featuredResourceIds":930,"seo":931},{"status":663,"indexable":10},"Industrial Flame Detectors","Browse MIC-200 infrared and combined ultraviolet\u002Finfrared flame detectors. Compare sensing configuration, documented detection distance and response, and output requirements for the intended installation.",[],[924],{"id":669,"heading":687,"paragraphs":925},[926,927,928,929],"Compare infrared and combined ultraviolet\u002Finfrared sensing configurations.","Review detection distance and response together with the documented target and test conditions.","Check signal outputs and installation requirements against the receiving system.","Confirm the selected model’s certificate scope and suitability for the site.",[],{"title":932,"description":933,"ogTitle":934,"ogDescription":933},"Industrial IR and UV\u002FIR Flame Detectors","Compare MIC-200 IR and UV\u002FIR flame detectors by sensing configuration, documented distance, response and outputs for industrial installations.","Industrial IR and UV\u002FIR Flame Detectors | Eranntex",60,{"id":937,"url":938,"alt":939,"localizedAlt":940,"width":894,"height":894,"mimeType":705,"roles":942},"media-mic-200-ir2-1","\u002Fimages\u002Fproducts\u002Feranntex-explosion-proof-flame-detector-mic-200-series-front-view.webp","Perspective front view of the Eranntex MIC-200 series explosion-proof flame detector featuring a red flameproof cast housing, integrated sunshield, optical lens window, and multi-axis adjustable swivel mounting bracket.",{"zh-CN":941},"逸云天 MIC-200 系列防爆火焰探测器的正面透视图：红色隔爆铸造外壳、一体式遮阳罩、光学镜片窗口，以及可多向调节的旋转安装支架。",[707,708,709],{"id":97,"slug":944,"name":945,"description":946,"marketContent":947,"displayOrder":981,"media":982},"connected-monitoring-systems","Connected Monitoring Systems","Wireless gas detection networks paired with cloud-based dashboards for real-time fleet and site visibility.",[948,965],{"market":315,"locale":316,"publication":949,"displayName":950,"h1":950,"intro":951,"sections":952,"selectionGuidance":953,"featuredResourceIds":960,"seo":961},{"status":663,"indexable":10},"联网监测系统","评估智能云监测平台在兼容监测点之间实现读数、报警与历史记录集中管理的能力。设备接入与集成范围按项目逐一确认。",[],[954],{"id":669,"heading":670,"paragraphs":955},[956,957,958,959],"请明确需要接入的设备，并按项目确认兼容性。","与技术销售共同确定通讯路径与部署要求。","请核对所需各现场的报警记录、趋势历史与可见范围。","订购前请明确是否需要接入 DCS、PLC 或第三方系统；兼容性须按项目确认。",[],{"title":962,"description":963,"ogTitle":964,"ogDescription":963},"联网监测与智能云平台","通过智能云监测平台集中管理兼容监测点、报警与历史数据。请按项目确认设备兼容性与集成范围。","联网监测与智能云平台 | 逸云天",{"market":17,"locale":18,"publication":966,"displayName":945,"h1":945,"intro":967,"sections":968,"selectionGuidance":969,"featuredResourceIds":976,"seo":977},{"status":663,"indexable":10},"Evaluate the Smart Cloud Monitoring Platform for centralized readings, alarms and history across compatible monitoring points. Device connections and integration scope are confirmed for each project.",[],[970],{"id":669,"heading":687,"paragraphs":971},[972,973,974,975],"Identify the devices to connect and confirm compatibility for the project.","Define the communication path and deployment requirements with technical sales.","Review alarm records, trend history and visibility across the required sites.","Identify any required DCS, PLC or third-party integration before ordering; compatibility must be confirmed for the project.",[],{"title":978,"description":979,"ogTitle":980,"ogDescription":979},"Connected Monitoring and Smart Cloud Platform","Centralize compatible monitoring points, alarms and historical data with the Smart Cloud Monitoring Platform. Confirm device compatibility and integration scope for your project.","Connected Monitoring and Smart Cloud Platform | Eranntex",70,{"id":983,"url":984,"alt":985,"localizedAlt":986,"width":988,"height":989,"mimeType":705,"roles":990},"media-smart-cloud-platform-operations-wallboard","\u002Fimages\u002Fproducts\u002Fcloud-platform\u002Fsmart-cloud-operations-wallboard-redacted.webp","Smart Cloud Monitoring Platform operations wallboard showing device status, weather, location and alarm trends with operational data redacted.",{"zh-CN":987},"智能云监测平台运营大屏，显示设备状态、天气、位置和报警趋势；运营数据已做遮挡处理。",2560,1229,[707,708,709],[],[993,998,1003,1008],{"slug":994,"marketContent":995},"personal-gas-monitoring",[996],{"market":315,"displayName":997},"个人气体监测",{"slug":999,"marketContent":1000},"confined-space-entry",[1001],{"market":315,"displayName":1002},"受限空间作业",{"slug":1004,"marketContent":1005},"leak-detection",[1006],{"market":315,"displayName":1007},"泄漏检测",{"slug":1009,"marketContent":1010},"area-monitoring",[1011],{"market":315,"displayName":1012},"区域监测",[1014,1019,1024],{"slug":1015,"marketContent":1016},"oil-and-gas",[1017],{"market":315,"displayName":1018},"油气",{"slug":1020,"marketContent":1021},"chemical",[1022],{"market":315,"displayName":1023},"化工",{"slug":1025,"marketContent":1026},"water-and-wastewater",[1027],{"market":315,"displayName":1028},"水与污水",[1030,1036,1041,1046,1052,1057],{"slug":1031,"type":1032,"marketContent":1033},"public-procurement-awards-qingdao-xinjiang","news",[1034],{"market":315,"title":1035},"逸云天祝贺供应商在青岛、新疆政府采购项目中标",{"slug":1037,"type":1032,"marketContent":1038},"oman-customer-visit-refrigerated-vehicle-gas-detection",[1039],{"market":315,"title":1040},"逸云天接待阿曼客户，洽谈冷藏车气体检测",{"slug":1042,"type":1032,"marketContent":1043},"customer-training-custom-vehicle-exhaust-project",[1044],{"market":315,"title":1045},"逸云天接待客户开展定制车辆尾气项目培训",{"slug":1047,"type":1048,"marketContent":1049},"h2s-monitor-peak-twa-records","technical_guide",[1050],{"market":315,"title":1051},"H₂S 峰值高、TWA 低：接下来该核查什么",{"slug":1053,"type":1048,"marketContent":1054},"wastewater-gas-monitoring-sample-handling",[1055],{"market":315,"title":1056},"污水 H₂S 监测：为潮湿的池内空气搭建气体采样系统",{"slug":1058,"type":1048,"marketContent":1059},"gas-detector-quotation-checklist",[1060],{"market":315,"title":1061},"气体检测仪询价准备清单",{"value":1063},{"brand":1064,"overseasLegalEntity":1066,"manufacturingLegalEntity":1069},{"name":1065},"Eranntex",{"id":1067,"legalNameEn":1068},"organization-eranntex","Shenzhen Eranntex Electronics Co., Ltd.",{"id":1067,"legalNameZh":1070,"legalNameEn":1071},"深圳市逸云天电子有限公司","Shenzhen Yiyuntian Electronics Co., Ltd.",{"value":1073},{"id":24,"identity":1074,"manufacturingEstablishedYear":1078,"brandEstablishedYear":1079,"industries":1080,"certificateIds":1090,"marketContent":1093,"sources":1869},{"brand":1075,"overseasLegalEntity":1076,"manufacturingLegalEntity":1077},{"name":1065},{"id":1067,"legalNameEn":1068},{"id":1067,"legalNameZh":1070,"legalNameEn":1071},2006,2014,[1081,1082,1083,1084,1085,1086,1087,1088,1089],"Oil and gas","Chemical processing","Gas transmission and storage","Municipal gas","Fire safety","Environmental monitoring","Metallurgy","Biopharmaceuticals","Energy and power",[1091,1092],"certificate-iso-14001-2024","certificate-high-tech-enterprise-2023",[1094,1553],{"market":17,"locale":18,"publication":1095,"displayName":1096,"intro":1097,"mission":1098,"values":1099,"valuesStatement":1104,"portfolioSummary":1105,"overviewSections":1106,"operatingModel":1125,"qualityIntro":1151,"history":1152,"contact":1176,"heroMedia":1208,"storyMedia":1214,"manufacturing":1221,"seo":1550},{"status":663,"indexable":10},"About Eranntex","Eranntex presents portable and fixed gas detectors, gas analysis equipment and monitoring systems for international industrial projects. Shenzhen Eranntex Electronics Co., Ltd. and Shenzhen Yiyuntian Electronics Co., Ltd. are official names of the same legal entity, covering international enquiries and Shenzhen manufacturing.","To protect the health of everyone and the safety of their working environment.",[1100,1101,1102,1103],"Integrity","Innovation","Professionalism","Quality","A safety partner you can trust.","The range includes personal and portable detectors, fixed transmitters, gas alarm controllers, process gas analyzers and sample-conditioning equipment. Model specifications and certificate scope should be checked against the intended monitoring task.",[1107,1113,1119],{"id":1108,"heading":1109,"paragraphs":1110},"company-foundation","Gas detection equipment from Shenzhen",[1111,1112],"Shenzhen Yiyuntian Electronics Co., Ltd. was established in 2006 to develop, manufacture and support gas detection and analysis equipment.","The Eranntex brand was established in 2014 to bring this industrial gas detection experience to international markets.",{"id":1114,"heading":1115,"paragraphs":1116},"company-technical-development","Equipment design, manufacture and project review",[1117,1118],"Product development and manufacturing cover portable and fixed gas detection, gas analysis, sample conditioning and online monitoring equipment.","For a project review, the useful starting point is the target gas and range, number of gases to monitor at once, operating conditions, sampling arrangement, required outputs and documentation.",{"id":1120,"heading":1121,"paragraphs":1122},"company-customer-commitment","From technical enquiry to a defined scope",[1123,1124],"A technical enquiry can be reviewed against model capabilities, available configuration options, installation interfaces and the documents needed by the buyer.","Any quotation or project scope should identify what is confirmed, what depends on a selected configuration and what remains to be checked.",[1126,1131,1136,1141,1146],{"id":1127,"heading":1128,"paragraphs":1129},"company-requirement-definition","Application and site conditions",[1130],"Record the monitoring task, target gases and ranges, location, ambient conditions and any area classification supplied by the project.",{"id":1132,"heading":1133,"paragraphs":1134},"company-solution-design","Measurement and sampling",[1135],"Compare portable, fixed and online approaches against the number of gases to monitor at once, sampling method and response conditions.",{"id":1137,"heading":1138,"paragraphs":1139},"company-product-realization","Configuration and interfaces",[1140],"Check model-level gas options separately from any confirmed orderable configuration. For fixed systems, record power, signals, alarms and controller interfaces.",{"id":1142,"heading":1143,"paragraphs":1144},"company-installation-commissioning","Documents and project scope",[1145],"Match requested manuals, drawings, declarations and certificates to the exact model or configuration. Define installation and commissioning responsibilities in the project scope.",{"id":1147,"heading":1148,"paragraphs":1149},"company-service-operation","Operation and service planning",[1150],"Identify calibration, maintenance, spare-part and training needs before handover; confirm the support arrangements available for the destination market.","Company qualifications are presented with the named entity, issuing details and validity shown on each record, supporting a clear supplier review.",[1153,1159,1165,1171],{"period":1154,"heading":1155,"paragraphs":1156},"2006–2010","Early portable and fixed instruments",[1157,1158],"Shenzhen Yiyuntian Electronics Co., Ltd. was established in 2006. Early product work included portable and handheld pump-sampling detectors, followed by fixed gas detectors.","The equipment range broadened for industrial and environmental monitoring applications.",{"period":1160,"heading":1161,"paragraphs":1162},"2013–2014","R&D center and Eranntex brand",[1163,1164],"A dedicated research and development center was established in 2013 to support work on higher-end gas analysis instruments.","In 2014, Eranntex was introduced as the company’s independent brand.",{"period":1166,"heading":1167,"paragraphs":1168},"2017–2019","Cloud monitoring and analytical methods",[1169,1170],"Development expanded into remote gas monitoring and connected platforms. A gas monitoring cloud platform entered use in 2018 as part of broader integrated monitoring work.","By 2019, development had progressed in laser analysis, differential ultraviolet analysis and CEMS-related systems.",{"period":1172,"heading":1173,"paragraphs":1174},"2020–2026","Intelligent instruments and software",[1175],"Work in 2023 included higher-end gas detectors, intelligent instruments and supporting software systems.",{"headquartersName":1177,"addressLines":1178,"location":1182,"mainPhone":1191,"mainPhoneExtension":1192,"salesEmail":1193,"salesRegions":1194,"serviceContacts":1207},"Shenzhen office and factory",[1179,1180,1181],"Unit B, 7\u002FF, Building 10, Rundongsheng Industrial Zone","Longzhu Community, Xixiang Subdistrict, Bao'an District","Shenzhen, Guangdong, China",{"registeredAddressZh":1183,"postalAddress":1184,"googleMapsQuery":1188,"baiduMapsQuery":1189,"appleMapsQuery":1189,"amapPoiId":1190},"深圳市宝安区西乡街道龙珠社区润东晟工业区10栋7层B",{"streetAddress":1185,"addressLocality":1186,"addressRegion":1187,"addressCountry":315},"Unit B, 7\u002FF, Building 10, Rundongsheng Industrial Zone, Longzhu Community, Xixiang Subdistrict, Bao'an District","Shenzhen","Guangdong","润东晟工业园 西乡街道 宝安区 深圳","深圳市宝安区西乡街道润东晟工业区10栋","B0FFG9KKDP","0755-26991270","0","info@eranntex.com",[1195,1199,1203],{"id":1196,"name":1197,"coverage":1198},"americas","Americas","North America, Central America, South America and the Caribbean",{"id":1200,"name":1201,"coverage":1202},"europe","Europe","European Union, United Kingdom and other European markets",{"id":1204,"name":1205,"coverage":1206},"asia-pacific","Asia-Pacific and other markets","Asia-Pacific, Middle East, Africa and markets not listed above",[],{"id":1209,"url":1210,"alt":1211,"width":1212,"height":1213,"mimeType":705},"media-facility-reception","\u002Fimages\u002Fcompany\u002Ffacility\u002Freception.webp","Eranntex reception desk with the Eranntex and 逸云天 name wall",1600,1200,{"id":1215,"url":1216,"alt":1217,"width":1218,"height":1219,"mimeType":1220},"media-company-story-representative","\u002Fimages\u002Findustries\u002Fchemical-processing-v2.png","Safety technician checking industrial process equipment with a gas detector",1536,1024,"image\u002Fpng",{"displayName":1222,"eyebrow":1223,"h1":1224,"intro":1225,"heroMedia":1226,"heroClip":1232,"facts":1241,"video":1261,"routeHeading":1281,"routeIntro":1282,"route":1283,"routeFinale":1344,"galleryAreas":1347,"gallery":1361,"invitation":1462,"seo":1547},"Manufacturing & Factory Visit","Shenzhen factory · since 2006","See where your gas detectors are built","Twelve production lines, a calibration area and our engineering team, all at one site in Shenzhen. Come and see it in person or on a video call.",{"id":1227,"url":1228,"alt":1229,"width":1230,"height":1231,"mimeType":705},"media-facility-production-line-2026","\u002Fimages\u002Fcompany\u002Ffacility\u002Fproduction-line-2026.webp","Eranntex production floor with assembly benches and staff at work, March 2026",2000,1500,{"url":1233,"mimeType":1234,"width":1235,"height":1236,"poster":1237},"\u002Fvideos\u002Fcompany\u002Fline-hero.mp4","video\u002Fmp4",1280,470,{"id":1238,"url":1239,"alt":1240,"width":1235,"height":1236,"mimeType":705},"media-facility-line-hero-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-hero-poster.webp","Eranntex production floor with staff at the assembly lines",[1242,1249,1255],{"id":1243,"label":1244,"value":1245},"production-lines","Production lines",{"value":1246,"unit":1247,"qualifier":1248},12,"","exact",{"id":1250,"label":1251,"value":1252},"daily-capacity","Daily capacity",{"value":1253,"unit":1254,"qualifier":1248},500,"units",{"id":1256,"label":1257,"value":1258},"floor-area","Factory and office space",{"value":1259,"unit":1260,"qualifier":1248},6000,"m²",{"id":1262,"url":1263,"mimeType":1234,"width":1235,"height":1264,"durationSeconds":1265,"recordedDate":1266,"title":1267,"description":1268,"scopeNote":1269,"transcript":1270,"poster":1277},"video-verified-supplier-2026","\u002Fvideos\u002Fcompany\u002Fverified-supplier-2026.mp4",720,130,"2026-05-12","Supplier verification video, May 2026","Recorded at the Shenzhen factory on 12 May 2026 for the Alibaba.com Verified Supplier on-site verification. The video carries the Alibaba.com, Verified Supplier and SGS marks and is narrated in English.","Certificates mentioned in the film, such as ATEX, CE and CCCF, apply to specific models. Each product page lists the certificates that cover that model.",[1271,1272,1273,1274,1275,1276],"Founded in 2006, Shenzhen Eranntex Electronics Co., Ltd. is a National High-Tech Enterprise with over 20 years of industry experience. We integrate design, R&D, production, and sales to provide one-stop total solutions for gas detection.","We operate 12 advanced production lines with a daily capacity of 500 units, handling all types of orders with precision and a firm commitment to 100% on-time delivery.","Eranntex holds over 300 patents and multiple international certifications, including ISO 9001, ISO 14001, ISO 45001, EU ATEX (explosion-proof), CE, RoHS, and CCCF.","Leveraging our core technical strengths, we have successfully delivered more than 10,000 customized gas detection solutions across various industries, precisely meeting diverse monitoring needs.","Our diverse product portfolio includes toxic, hazardous, flammable, and explosive gas detectors, gas analyzers, gas alarm controllers, gas online monitoring pre-treatment systems, micro air monitoring stations, odor online monitoring systems, DOAS (Differential Optical Absorption Spectroscopy) gas analyzers, and gas monitoring cloud platforms. These products are widely used in industries such as petroleum, chemicals, environmental protection, and biopharmaceuticals.","We always put service first, offering 24\u002F7 response, a one-year quality guarantee, professional technical training, and lifetime equipment maintenance. We are committed to safeguarding customer safety with expertise and responsibility, and to empowering high-quality industry development.",{"id":1278,"url":1279,"alt":1280,"width":1235,"height":1264,"mimeType":705},"media-facility-verified-supplier-2026-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fverified-supplier-2026-poster.webp","Frame from the verification video showing the Eranntex production floor","Walk the factory floor","Follow the route a visitor takes, from reception to the warehouse.",[1284,1296,1308,1320,1332],{"id":1285,"label":1286,"heading":1287,"fact":1288,"text":1289,"clip":1290},"stop-arrival","Arrival","Reception and showroom","Offices and factory at one address","Meet the team that handles your enquiry, then walk straight onto the production floor.",{"url":1291,"mimeType":1234,"width":1235,"height":1236,"poster":1292},"\u002Fvideos\u002Fcompany\u002Fline-arrival.mp4",{"id":1293,"url":1294,"alt":1295,"width":1235,"height":1236,"mimeType":705},"media-facility-line-arrival-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-arrival-poster.webp","Eranntex name wall in the reception area",{"id":1297,"label":1298,"heading":1299,"fact":1300,"text":1301,"clip":1302},"stop-engineering","Engineering","Electronics and enclosure design","In-house R&D since 2013","We design and debug circuit boards and instrument housings here, right next to the lines that build them.",{"url":1303,"mimeType":1234,"width":1235,"height":1236,"poster":1304},"\u002Fvideos\u002Fcompany\u002Fline-engineering.mp4",{"id":1305,"url":1306,"alt":1307,"width":1235,"height":1236,"mimeType":705},"media-facility-line-engineering-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-engineering-poster.webp","Engineer reviewing a circuit board layout on screen",{"id":1309,"label":1310,"heading":1311,"fact":1312,"text":1313,"clip":1314},"stop-production","Production","Assembly and bench testing","12 lines · 500 units a day","Portable and fixed gas detectors are assembled, powered up and checked on the bench.",{"url":1315,"mimeType":1234,"width":1235,"height":1236,"poster":1316},"\u002Fvideos\u002Fcompany\u002Fline-production.mp4",{"id":1317,"url":1318,"alt":1319,"width":1235,"height":1236,"mimeType":705},"media-facility-line-production-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-production-poster.webp","Portable gas detectors being checked on an assembly bench",{"id":1321,"label":1322,"heading":1323,"fact":1324,"text":1325,"clip":1326},"stop-calibration","Calibration","Calibration with test gas","Dedicated calibration area","Instruments are calibrated under extraction hoods using cylinder gas, and environmental tests run in a temperature and humidity chamber.",{"url":1327,"mimeType":1234,"width":1235,"height":1236,"poster":1328},"\u002Fvideos\u002Fcompany\u002Fline-calibration.mp4",{"id":1329,"url":1330,"alt":1331,"width":1235,"height":1236,"mimeType":705},"media-facility-line-calibration-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-calibration-poster.webp","Staff working at the calibration hoods",{"id":1333,"label":1334,"heading":1335,"fact":1336,"text":1337,"clip":1338},"stop-shipment","Shipment","Stock and dispatch","On-site warehouse","Finished batches are staged, packed and stored on site until they ship.",{"url":1339,"mimeType":1234,"width":1235,"height":1236,"poster":1340},"\u002Fvideos\u002Fcompany\u002Fline-shipment.mp4",{"id":1341,"url":1342,"alt":1343,"width":1235,"height":1236,"mimeType":705},"media-facility-line-shipment-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-shipment-poster.webp","Packed cartons stacked in the warehouse",{"heading":1345,"text":1346},"Next stop: your visit","See it all in a single morning, with time to test samples against your own requirements.",[1348,1350,1352,1355,1358],{"area":1349,"label":1298,"fact":1300},"development",{"area":1351,"label":1310,"fact":1312},"production",{"area":1353,"label":1354,"fact":1324},"testing","Calibration & testing",{"area":1356,"label":1357,"fact":1336},"shipment","Stock & shipment",{"area":1359,"label":1360,"fact":1288},"site","Offices & people",[1362,1365,1368,1374,1380,1387,1393,1399,1406,1412,1419,1425,1432,1438,1444,1450,1456],{"area":1359,"media":1363,"caption":1364},{"id":1209,"url":1210,"alt":1211,"width":1212,"height":1213,"mimeType":705},"Reception, where we welcome visitors.",{"area":1351,"media":1366,"caption":1367},{"id":1227,"url":1228,"alt":1229,"width":1230,"height":1231,"mimeType":705},"Production floor, March 2026.",{"area":1353,"media":1369,"caption":1373},{"id":1370,"url":1371,"alt":1372,"width":1212,"height":1213,"mimeType":705},"media-facility-gas-blending-system","\u002Fimages\u002Fcompany\u002Ffacility\u002Fgas-blending-system.webp","Front panel of a GDS-D4 four-component dynamic gas blending system","Four-component gas blending system for calibration.",{"area":1351,"media":1375,"caption":1379},{"id":1376,"url":1377,"alt":1378,"width":1212,"height":1213,"mimeType":705},"media-facility-fixed-detector-assembly","\u002Fimages\u002Fcompany\u002Ffacility\u002Ffixed-detector-assembly.webp","Fixed gas detector housings on assembly carts beside a production line","Fixed gas detectors in assembly.",{"area":1349,"media":1381,"caption":1386},{"id":1382,"url":1383,"alt":1384,"width":1212,"height":1385,"mimeType":705},"media-facility-powered-board-racks","\u002Fimages\u002Fcompany\u002Ffacility\u002Fpowered-board-racks.webp","Rows of powered detector circuit boards with lit displays on a test rack",1066,"Circuit boards running on a test rack.",{"area":1353,"media":1388,"caption":1392},{"id":1389,"url":1390,"alt":1391,"width":1212,"height":1385,"mimeType":705},"media-facility-environmental-chamber","\u002Fimages\u002Fcompany\u002Ffacility\u002Fenvironmental-chamber.webp","Engineer recording readings at a temperature and humidity test chamber","Temperature and humidity test chamber.",{"area":1356,"media":1394,"caption":1398},{"id":1395,"url":1396,"alt":1397,"width":1212,"height":1213,"mimeType":705},"media-facility-fixed-detector-batch","\u002Fimages\u002Fcompany\u002Ffacility\u002Ffixed-detector-batch.webp","Rows of fixed gas detector housings staged on a bench","A batch of fixed detector housings.",{"area":1359,"media":1400,"caption":1405},{"id":1401,"url":1402,"alt":1403,"width":1230,"height":1404,"mimeType":705},"media-facility-team","\u002Fimages\u002Fcompany\u002Ffacility\u002Fteam.webp","Eranntex staff group photograph in front of the company name wall",864,"The Eranntex team in Shenzhen.",{"area":1353,"media":1407,"caption":1411},{"id":1408,"url":1409,"alt":1410,"width":1212,"height":1385,"mimeType":705},"media-facility-analyzer-system-test","\u002Fimages\u002Fcompany\u002Ffacility\u002Fanalyzer-system-test.webp","Two engineers checking an analyzer cabinet at a test station","Engineers checking an analyzer cabinet.",{"area":1349,"media":1413,"caption":1418},{"id":1414,"url":1415,"alt":1416,"width":1212,"height":1417,"mimeType":705},"media-facility-circuit-debugging","\u002Fimages\u002Fcompany\u002Ffacility\u002Fcircuit-debugging.webp","Two engineers debugging a circuit board with an oscilloscope",1126,"Debugging a circuit board.",{"area":1356,"media":1420,"caption":1424},{"id":1421,"url":1422,"alt":1423,"width":1212,"height":1213,"mimeType":705},"media-facility-warehouse","\u002Fimages\u002Fcompany\u002Ffacility\u002Fwarehouse.webp","Wall of packed cartons in the on-site warehouse","Packed cartons in the warehouse.",{"area":1359,"media":1426,"caption":1431},{"id":1427,"url":1428,"alt":1429,"width":1212,"height":1430,"mimeType":705},"media-facility-certificate-wall","\u002Fimages\u002Fcompany\u002Ffacility\u002Fcertificate-wall.webp","Showroom shelves holding company certificates and instruments under the Eranntex name",1046,"Certificates on display in the showroom.",{"area":1351,"media":1433,"caption":1437},{"id":1434,"url":1435,"alt":1436,"width":1212,"height":1213,"mimeType":705},"media-facility-portable-detector-line","\u002Fimages\u002Fcompany\u002Ffacility\u002Fportable-detector-line.webp","Portable gas detectors laid out on a production line bench","Portable detectors on the production line.",{"area":1353,"media":1439,"caption":1443},{"id":1440,"url":1441,"alt":1442,"width":1212,"height":1213,"mimeType":705},"media-facility-calibration-area","\u002Fimages\u002Fcompany\u002Ffacility\u002Fcalibration-area.webp","Calibration area with a row of extraction hoods and test gas cylinders","The calibration area.",{"area":1356,"media":1445,"caption":1449},{"id":1446,"url":1447,"alt":1448,"width":1212,"height":1213,"mimeType":705},"media-facility-finished-batch","\u002Fimages\u002Fcompany\u002Ffacility\u002Ffinished-batch.webp","Carts holding a batch of finished portable gas detectors","A batch of finished portable detectors.",{"area":1359,"media":1451,"caption":1455},{"id":1452,"url":1453,"alt":1454,"width":1212,"height":1385,"mimeType":705},"media-facility-sales-office","\u002Fimages\u002Fcompany\u002Ffacility\u002Fsales-office.webp","Open-plan office where the sales and support teams work","Sales and support office.",{"area":1359,"media":1457,"caption":1461},{"id":1458,"url":1459,"alt":1460,"width":1212,"height":1385,"mimeType":705},"media-facility-recognition-plaques","\u002Fimages\u002Fcompany\u002Ffacility\u002Frecognition-plaques.webp","Six recognition plaques mounted on the showroom wall","Recognition plaques in the showroom.",{"heading":1463,"backdrop":1464,"letter":1465,"host":1469,"agendaHeading":1476,"agenda":1477,"agendaNote":1506,"prepared":1507,"travel":1512,"formHeading":1532,"formIntro":1533,"interests":1534,"needs":1539,"visitMessage":1545,"videoTourMessage":1546},"Come and see it for yourself",{"id":1209,"url":1210,"alt":1211,"width":1212,"height":1213,"mimeType":705},[1466,1467,1468],"Documents and videos only tell part of the story. When you choose a supplier of gas detection equipment, it helps to see the production lines, watch an instrument being calibrated and meet the engineers who will support your project.","We welcome buyers to our factory in Shenzhen. Tell us what you need to see, and my team will plan the day around it, from the airport to your last question.","I look forward to meeting you.",{"name":1470,"title":1471,"organization":1068,"portrait":1472},"Cui Dian","General Manager",{"id":1473,"url":1474,"alt":1475,"width":704,"height":894,"mimeType":705},"media-facility-general-manager-cui","\u002Fimages\u002Fcompany\u002Ffacility\u002Fgeneral-manager-cui.webp","Cui Dian, General Manager of Shenzhen Eranntex Electronics Co., Ltd.","Your day, planned around your agenda",[1478,1482,1486,1490,1494,1498,1502],{"id":1479,"heading":1480,"text":1481},"agenda-pickup","Airport pickup","From Shenzhen Bao'an International Airport, about 13 km away.",{"id":1483,"heading":1484,"text":1485},"agenda-briefing","Welcome and briefing","In our meeting room, with English documentation and brochures ready.",{"id":1487,"heading":1488,"text":1489},"agenda-lines","Production line tour","See assembly and bench testing up close.",{"id":1491,"heading":1492,"text":1493},"agenda-calibration","Calibration demonstration","Watch an instrument being calibrated with calibration gas.",{"id":1495,"heading":1496,"text":1497},"agenda-samples","Sample testing","We test product samples against your requirements.",{"id":1499,"heading":1500,"text":1501},"agenda-lunch","Lunch","A chance to talk through your project.",{"id":1503,"heading":1504,"text":1505},"agenda-return","Return to the airport","Or on to your next meeting.","Pick what matters to you, and we will take care of the rest.",[1508,1509,1510,1511],"Meeting room","English documentation","Product samples","Brochures",[1513,1520,1524,1528],{"id":1514,"heading":1515,"text":1516,"figure":1517},"travel-szx","From Shenzhen Bao'an Airport (SZX)","by road to the factory, and we can pick you up",{"value":1518,"unit":1519},13,"km",{"id":1521,"heading":1522,"text":1523},"travel-hk","Arriving via Hong Kong","Let us know how you are crossing into Shenzhen and we will plan the transfer with you.",{"id":1525,"heading":1526,"text":1527},"travel-visa","Business visa","We will send you a business invitation letter once your visit is confirmed.",{"id":1529,"heading":1530,"text":1531},"travel-video","Can't travel?","Take a live video tour of the factory over WhatsApp.","Request your visit","We will reply by email to confirm the date and plan the day with you.",[1535,1536,1537,1538,1492,1496],"Portable gas detectors","Fixed gas detectors","Controllers and systems","Gas analyzers",[1540,1542],{"id":1541,"label":1480},"pickup",{"id":1543,"label":1544},"visa","Business visa invitation letter","Hello, I would like to arrange a visit to the Eranntex factory in Shenzhen.","Hello, I would like to book a live video tour of the Eranntex factory.",{"title":1548,"description":1549},"Eranntex Gas Detector Factory in Shenzhen","See the Eranntex gas detector factory in Shenzhen: 12 production lines, a calibration area and an on-site warehouse. Watch the supplier verification video or arrange a visit.",{"title":1551,"description":1552},"About Eranntex Industrial Gas Detection","See Eranntex gas detection equipment, Shenzhen manufacturing origin, product development history and company qualifications for supplier review.",{"market":315,"locale":316,"publication":1554,"displayName":1555,"intro":1556,"mission":1557,"values":1558,"valuesStatement":1563,"portfolioSummary":1564,"overviewSections":1565,"operatingModel":1581,"qualityIntro":1602,"heroMedia":1603,"storyMedia":1605,"manufacturing":1607,"history":1833,"contact":1850,"seo":1866},{"status":663,"indexable":10},"关于逸云天","逸云天（Eranntex）面向国际工业项目提供便携式与固定式气体检测仪、气体分析设备与监测系统。Shenzhen Eranntex Electronics Co., Ltd. 与深圳市逸云天电子有限公司（Shenzhen Yiyuntian Electronics Co., 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便携式单气体检测仪","用于连续单气体监测的低功耗便携式扩散检测仪。",[2286],{"id":2287,"heading":2288,"paragraphs":2289},"ms104k-s1-overview","低功耗单气体监测",[2290],"BTYQ-MS104K-S1 是用于监测一种选定气体的紧凑型便携扩散式探测器；达到设定限值时发出声、光与振动报警。其低功耗、不可充电设计在每天使用 8 小时的条件下工作时长为 1 至 2 年。1.7 英寸液晶屏显示读数与报警。报警事件存储与跌倒报警支持现场使用。气体、量程以及电化学或低功耗红外传感原理按应用选定。",[],[],[],{"Technical":2295,"Response time":2296,"Operating humidity":2297,"Configuration":2298,"Recovery time":2299,"Standard gas configuration":2300,"Expanded gas configuration":2301,"Typical operating range.":2302,"Explosion protection":2303,"No higher gas-count expansion documented":2304,"1 gas":2305,"≤ ±3% FS; higher-accuracy sensors available":2306,"Typical measurement accuracy":2307,"Housing":2308,"Optional accessories":2309,"10–95% RH; −40°C to +70°C available as a custom temperature range":2310,"87 × 63 × 32 mm (maximum L × W × H)":2311,"Angled view of the Eranntex portable single gas detector model BTYQ-MS104K-S1 showcasing its monochrome screen and ergonomic body design.":2312,"Communication dock with Type-C interface":2313,"Documented alarm volume exceeds 90 dB at 30 cm.":2314,"Electrochemical or low-power infrared, selected by range and application":2315,"Electrochemical: 2–3 years; infrared: 5–10 years":2316,"Eranntex BTYQ-MS104K-S1 product view.":2317,"Front view of the Eranntex portable single gas detector model BTYQ-MS104K-S1 featuring a clear monochrome screen display.":2318,"High-strength, corrosion-resistant, flame-retardant polycarbonate with rubber overmould; drop resistance ≥8 m":2319,"Sensor life":2320,"Sensor principles":2321,"Working time is 1–2 years with 8 hours of use per day; non-rechargeable design.":2322,"years":2323},"技术参数","响应时间","工作湿度","配置","恢复时间","标配气体配置","扩展气体配置","典型工作范围。","防爆等级","资料未记载更多气体数量的扩展","1 种气体","≤ ±3% FS；可选更高精度传感器","典型测量精度","外壳","选配配件","10–95% RH；可定制 −40°C 至 +70°C 温度范围","87 × 63 × 32 mm（最大长 × 宽 × 高）","逸云天便携式单一气体检测仪 BTYQ-MS104K-S1 斜视图，可见单色屏幕和符合人体工学的机身设计。","Type-C 接口通讯底座","资料记载报警音量在 30 cm 处超过 90 dB。","电化学或低功耗红外，按量程和应用选择","电化学：2–3 年；红外：5–10 年","逸云天 BTYQ-MS104K-S1 产品图。","逸云天便携式单一气体检测仪 BTYQ-MS104K-S1 正面视图，可见清晰的单色屏幕。","高强度、耐腐蚀、阻燃聚碳酸酯外包橡胶；抗跌落 ≥8 m","传感器寿命","传感原理","按每天使用 8 小时计，可工作 1–2 年；不可充电设计。","年",{"market":17,"locale":18,"publication":2325,"displayName":2326,"h1":2326,"shortDescription":2327,"overview":2328,"featureCopy":2334,"applicationCopy":2335,"faq":2336},{"status":663,"indexable":10},"MS104K-S1 Portable Single-Gas Detector","A low-power portable diffusion detector for continuous single-gas monitoring.",[2329],{"id":2287,"heading":2330,"paragraphs":2331},"Low-power single-gas monitoring",[2332,2333],"BTYQ-MS104K-S1 is a compact portable diffusion detector for one selected gas, with audible, visual and vibration alarms when configured limits are reached. Its low-power, non-rechargeable design has a working time of one to two years with eight hours of use per day.","A 1.7-inch LCD shows readings and alarms. Alarm-event storage and man-down alarming support field use. The gas, measuring range and electrochemical or low-power infrared sensing principle are selected for the application.",[],[],[],[2338,2344,2349],{"id":2339,"url":2340,"alt":2341,"width":2342,"height":1212,"mimeType":705,"roles":2343},"media-ms104k-s1-frontend-fit-20261020","\u002Fimages\u002Fproducts\u002Ffrontend-fit-20261020\u002Feranntex-btyq-ms104k-s1-frontend-fit-20261020.webp","Eranntex BTYQ-MS104K-S1 product view.",1137,[707,708,709],{"id":2345,"url":2346,"alt":2347,"width":799,"height":799,"mimeType":705,"roles":2348},"media-ms104k-s1-2","\u002Fimages\u002Fproducts\u002Feranntex-portable-single-gas-detector-btyq-ms104k-s1-angle.webp","Angled view of the Eranntex portable single gas detector model BTYQ-MS104K-S1 showcasing its monochrome screen and ergonomic body design.",[709],{"id":2350,"url":2351,"alt":2352,"width":704,"height":704,"mimeType":705,"roles":2353},"media-ms104k-s1-3","\u002Fimages\u002Fproducts\u002Feranntex-portable-single-gas-detector-btyq-ms104k-s1-display-stand.webp","Front view of the Eranntex portable single gas detector model BTYQ-MS104K-S1 featuring a clear monochrome screen display.",[709],[],{"value":2356},[2357,2456,2464,2472,2481,2490,2498,2506,2514,2522,2529,2537,2545,2552,2560,2568,2577,2585,2593,2601,2608,2616,2624,2632,2641,2649,2657,2665,2673,2681,2688,2697,2705,2713,2721,2728,2737,2745,2753,2762,2771,2778,2787,2796,2805,2814,2822,2830,2838,2846,2855,2863,2872,2881,2890,2899,2907,2916,2924,2933,2942,2951,2960,2969,2978,2987,2996,3005,3014,3023,3032,3041,3050,3059,3068,3076],{"id":64,"slug":2358,"chemicalName":2359,"kind":1020,"medium":2360,"displayOrder":1879,"formula":2361,"category":2362,"localizedNames":2363,"marketContent":2365},"hydrogen-sulfide","Hydrogen Sulfide","air","H₂S","toxic",{"zh-CN":2364},"硫化氢",[2366,2414],{"market":17,"locale":18,"publication":2367,"displayName":2359,"h1":2368,"intro":2369,"hazards":2370,"detectionGuidance":2376,"referenceSourceIds":2392,"seo":2395,"faq":2397},{"status":663,"indexable":10},"Hydrogen Sulfide (H2S) Detection","Choose an H2S gas detector around the monitoring task, required measuring range and sampling conditions. Review Eranntex model options for portable, transportable, fixed and online monitoring equipment, then confirm the sensor configuration and project requirements before requesting a quotation.",[2371],{"id":2372,"heading":2373,"paragraphs":2374},"h2s-us-occupational-context","Why H2S Is Monitored",[2375],"In the United States occupational context, the CDC\u002FNIOSH Pocket Guide identifies hydrogen sulfide as a workplace chemical hazard. Monitoring helps organizations evaluate H2S conditions against their site procedures and applicable requirements. This page does not prescribe exposure limits, alarm settings or entry criteria; those requirements must be established for the relevant jurisdiction and task.",[2377,2385],{"id":2378,"heading":2379,"paragraphs":2380},"h2s-selection-questions","Four Questions for H2S Detector Selection",[2381,2382,2383,2384],"Monitoring task: Will the detector be worn by a person, carried between measurement points, or installed at a fixed location? Describe the work activity and where measurements are needed before comparing product types.","Unit and range: What H2S unit and measuring range does the project require? Include the expected concentration and required resolution. Compare each model's own options; a listed range does not establish suitability for a task or define exposure limits or alarm settings.","Gas configuration: Is H2S the only target, or must other gases be monitored at the same time? List each gas and range, and confirm the simultaneous channel configuration for the selected model.","Sampling conditions: Will gas reach the sensor by diffusion, or must a pump draw a sample from another location? Specify the sampling point, tubing and accessories, temperature, humidity and any condensation. Confirm the complete sampling arrangement for the intended conditions.",{"id":2386,"heading":2387,"paragraphs":2388},"h2s-reading-model-options","How to Read the H2S Model Options",[2389,2390,2391],"Compare options within the required measurement unit, then use the product links to review each model's specifications and available documents. The ranges, resolutions and sampling arrangements belong to the individual model shown; they are not a combined specification for one detector.","Each listed gas-and-range option describes a documented capability for that model. It does not identify an installed gas combination or a confirmed orderable configuration. Confirm the required gases, ranges and sampling arrangement for your project.","For BTYQ-MS104K-S1, confirm the sensing principle for the selected H2S range; the published model information does not assign a sensing principle to that option.",[2393,2394],"cdc-niosh-h2s-pocket-guide","pubchem-hydrogen-sulfide",{"title":2368,"description":2396},"Review Eranntex H2S detection options by measuring range, sampling method and product type, with model-specific guidance for engineering selection.",[2398,2402,2406,2410],{"id":2399,"question":2400,"answer":2401},"h2s-faq-measuring-range","What measuring range should an H2S detector have?","Base it on the H2S concentration expected at the measuring point and the resolution you need to read. Documented H2S ranges on Eranntex models run from 0–10 ppm up to 0–50,000 ppm on the GTYQ-MIC-500S fixed detector, and the finest documented resolution is 0.001 ppm.",{"id":2403,"question":2404,"answer":2405},"h2s-faq-personal-or-fixed","Should I choose a personal H2S monitor or a fixed H2S detector?","Choose by where the measurement is needed. A personal monitor is worn and samples the air close to the worker as they move; a fixed detector monitors one selected location continuously. Where the air has to be checked at a point a person should not enter, a pumped instrument draws the sample through a probe or line.",{"id":2407,"question":2408,"answer":2409},"h2s-faq-other-gases","Can an H2S detector measure other gases at the same time?","Yes, if the selected configuration includes them. The number differs by model: the MS104K-S2 measures one or two gases, the MS400-S has standard configurations for one to four, and the GTYQ-MIC-500S fixed detector measures one gas. List every gas and range the task needs so our sales engineers can confirm the configuration.",{"id":2411,"question":2412,"answer":2413},"h2s-faq-exposure-limits","What are the exposure limits for H2S?","They depend on the jurisdiction and the averaging period. In US general industry, OSHA's permissible exposure limit is a 20 ppm ceiling, with one peak of up to 50 ppm for up to 10 minutes allowed only if no other measurable exposure occurs during the 8-hour shift. NIOSH recommends a 10 ppm ceiling over 10 minutes and lists 100 ppm as immediately dangerous to life or health (IDLH). Great Britain's EH40\u002F2005 sets workplace exposure limits of 5 ppm long-term and 10 ppm short-term. These are exposure criteria, not detector alarm settings; the person responsible for the site's exposure assessment decides which one applies.",{"hazards":2415,"detectionGuidance":2420,"referenceSourceIds":2434,"faq":2435,"referenceLabels":2448,"market":315,"locale":316,"publication":2451,"displayName":2364,"h1":2452,"intro":2453,"seo":2454},[2416],{"id":2372,"heading":2417,"paragraphs":2418},"为什么监测 H₂S",[2419],"在美国职业健康语境下，CDC\u002FNIOSH 化学危害袖珍指南（Pocket Guide）将硫化氢列为工作场所化学危害。监测有助于组织依据本现场程序和适用要求评估 H₂S 状况。本页不规定接触限值（也称暴露限值）、报警设定或进入判据；这些要求须针对相应辖区和作业任务确定。",[2421,2428],{"id":2378,"heading":2422,"paragraphs":2423},"H₂S 检测仪选型的四个问题",[2424,2425,2426,2427],"监测任务：检测仪由人员佩戴、在测量点之间携带，还是安装在固定位置？比较产品类型之前，请先描述作业活动和需要测量的位置。","单位与量程：项目需要什么 H₂S 单位和量程？请说明预期浓度和所需分辨率。各型号的选项需分别比较；列出某个量程，并不代表它适用于某项任务，也不构成接触限值或报警设定。","气体配置：H₂S 是唯一的目标气体，还是必须同时监测其他气体？请列出每种气体和量程，并确认所选型号可同时检测的气体配置。","采样条件：气体以扩散方式到达传感器，还是必须由泵从其他位置抽取？请说明采样点、管路与配件、温度、湿度以及冷凝情况，并按预期条件确认完整的采样配置。",{"id":2386,"heading":2429,"paragraphs":2430},"如何看待各型号的 H₂S 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Concentration",1012,"OU",{"zh-CN":2985},"臭气浓度",[],{"id":2988,"slug":2989,"chemicalName":2990,"kind":1020,"medium":2360,"displayOrder":2991,"formula":2992,"category":2758,"localizedNames":2993,"marketContent":2995},"gas-heptafluoropropane","heptafluoropropane","Heptafluoropropane",1011,"C₃HF₇",{"zh-CN":2994},"七氟丙烷",[],{"id":2997,"slug":2998,"chemicalName":2999,"kind":1020,"medium":2360,"displayOrder":3000,"formula":3001,"category":2758,"localizedNames":3002,"marketContent":3004},"gas-refrigerant","refrigerant","Refrigerant",1010,"CFC",{"zh-CN":3003},"制冷剂",[],{"id":3006,"slug":3007,"chemicalName":3008,"kind":1020,"medium":2360,"displayOrder":3009,"formula":3010,"category":2758,"localizedNames":3011,"marketContent":3013},"gas-r22","refrigerant-r22","Refrigerant R22",1009,"R22",{"zh-CN":3012},"制冷剂 R22",[],{"id":3015,"slug":3016,"chemicalName":3017,"kind":1020,"medium":2360,"displayOrder":3018,"formula":3019,"category":2758,"localizedNames":3020,"marketContent":3022},"gas-r1234yf","refrigerant-r1234yf","Refrigerant R1234yf",1008,"R1234yf",{"zh-CN":3021},"制冷剂 R1234yf",[],{"id":3024,"slug":3025,"chemicalName":3026,"kind":1020,"medium":2360,"displayOrder":3027,"formula":3028,"category":2758,"localizedNames":3029,"marketContent":3031},"gas-r1234ze","refrigerant-r1234ze","Refrigerant R1234ze",1007,"R1234ze",{"zh-CN":3030},"制冷剂 R1234ze",[],{"id":3033,"slug":3034,"chemicalName":3035,"kind":1020,"medium":2360,"displayOrder":3036,"formula":3037,"category":2758,"localizedNames":3038,"marketContent":3040},"gas-r32","refrigerant-r32","Refrigerant R32",1006,"R32",{"zh-CN":3039},"制冷剂 R32",[],{"id":3042,"slug":3043,"chemicalName":3044,"kind":1020,"medium":2360,"displayOrder":3045,"formula":3046,"category":2758,"localizedNames":3047,"marketContent":3049},"gas-r14","refrigerant-r14","Refrigerant R14",1005,"R14",{"zh-CN":3048},"制冷剂 R14",[],{"id":3051,"slug":3052,"chemicalName":3053,"kind":1020,"medium":2360,"displayOrder":3054,"formula":3055,"category":2758,"localizedNames":3056,"marketContent":3058},"gas-r134a","refrigerant-r134a","Refrigerant R134a",1004,"R134a",{"zh-CN":3057},"制冷剂 R134a",[],{"id":3060,"slug":3061,"chemicalName":3062,"kind":1020,"medium":2360,"displayOrder":3063,"formula":3064,"category":2758,"localizedNames":3065,"marketContent":3067},"gas-sf6","sulfur-hexafluoride","Sulfur Hexafluoride",1003,"SF₆",{"zh-CN":3066},"六氟化硫",[],{"id":2262,"slug":3069,"chemicalName":3070,"kind":1020,"medium":2360,"displayOrder":3071,"formula":3072,"category":2758,"localizedNames":3073,"marketContent":3075},"propane","Propane",1002,"C₃H₈",{"zh-CN":3074},"丙烷",[],{"id":3077,"slug":3078,"chemicalName":3079,"kind":1020,"medium":2360,"displayOrder":894,"formula":3080,"category":2758,"localizedNames":3081,"marketContent":3083},"gas-ethanethiol","ethanethiol","Ethanethiol","C₂H₅SH",{"zh-CN":3082},"乙硫醇",[],{"value":3085},[3086,3107,3124,3140,3214,3234,3249,3264,3278,3293,3308,3322,3337,3351,3364,3385,3404,3418,3435,3454,3467,3483,3497,3514,3530,3547,3562,3578,3595,3612,3627,3642,3658,3674,3691,3707,3725,3739,3757,3771,3783,3799,3816,3829,3844,3859,3872,3885,3898],{"id":3087,"scheme":3088,"certificateNumber":3089,"issuer":3090,"issueDate":3091,"status":3092,"document":3093,"parties":3096,"scopes":3099,"localizedText":3102},"certificate-2026c743-44","China Type Approval Certificate (CPA)","2026C743-44","Guangdong Administration for Market Regulation","2026-10-26","active",{"sourceFile":3094,"sha256":3095,"pageCount":1879},"CPA证书GTYQ-MIC-500S型式批准证书.pdf","0f96445c114c83ff02a691124aff257ad372b95138d2cc5115e8b3ce055940b8",[3097],{"role":3098,"organizationName":1070},"applicant",[3100],{"productId":185,"scopeText":3101},"GTYQ-MIC-500S series methane detectors: GTYQ-MIC-500S-CH4-300 3-100 %LEL; GTYQ-MIC-500S-CH4-100 0-100 %LEL (explosion-protected). Maximum permissible error ±5 %FS.",{"zh-CN":3103},{"China Type Approval Certificate (CPA)":3104,"Guangdong Administration for Market Regulation":3105,"GTYQ-MIC-500S series methane detectors: GTYQ-MIC-500S-CH4-300 3-100 %LEL; GTYQ-MIC-500S-CH4-100 0-100 %LEL (explosion-protected). Maximum permissible error ±5 %FS.":3106},"计量器具型式批准证书（CPA）","广东省市场监督管理局","GTYQ-MIC-500S 系列甲烷检测器：GTYQ-MIC-500S-CH4-300 3-100 %LEL；GTYQ-MIC-500S-CH4-100 0-100 %LEL（防爆型）。最大允许误差 ±5 %FS。",{"id":1092,"scheme":3108,"certificateNumber":3109,"issueDate":3110,"expiryDate":3111,"status":3092,"parties":3112,"scopes":3115,"localizedText":3120},"High and New Technology Enterprise","GR202344201660","2023-10-16","2026-10-15",[3113],{"role":3114,"organizationName":1070},"holder",[3116],{"id":3117,"organizationId":3118,"scopeText":3119},"scope-high-tech-yiyuntian","organization-yiyuntian","Enterprise qualification certificate issued with a stated three-year validity period.",{"zh-CN":3121},{"High and New Technology Enterprise":3122,"Enterprise qualification certificate issued with a stated three-year validity period.":3123},"高新技术企业","企业资质证书，证书载明有效期三年。",{"id":1091,"scheme":3125,"certificateNumber":3126,"issueDate":3127,"expiryDate":3128,"status":3092,"parties":3129,"scopes":3132,"localizedText":3136},"ISO 14001:2015 Environmental Management System","51818E02387R2","2024-04-03","2027-04-02",[3130],{"role":3114,"organizationName":3131},"Shen Zhen Eranntex Electronics Co., Ltd.",[3133],{"id":3134,"organizationId":3118,"scopeText":3135},"scope-iso-14001-yiyuntian","R&D, production and service of gas detection instruments and the related environmental management activities.",{"zh-CN":3137},{"ISO 14001:2015 Environmental Management System":3138,"R&D, production and service of gas detection instruments and the related environmental management activities.":3139},"ISO 14001:2015 环境管理体系","气体检测仪器的研发、生产和服务及相关环境管理活动。",{"id":2272,"scheme":3141,"certificateNumber":3142,"issuer":3143,"issueDate":3144,"expiryDate":3145,"status":3092,"document":3146,"parties":3149,"scopes":3153,"localizedText":3192},"Environmental Labeling (Type II) Product Verification Certificate","ZII26080321001","广东中天认证中心有限公司","2026-09-17","2027-09-16",{"sourceFile":3147,"sha256":3148,"pageCount":2459},"00-待整理材料及推广设备清单\u002F资质认证\u002F环境标志-正本+附件.pdf","ee17b12fb1c5da567bab8e2444044a7013daee40ffe386a6e2f53356eb960ed7",[3150,3151],{"role":3098,"organizationName":1070},{"role":3152,"organizationName":1070},"manufacturer",[3154,3156,3158,3160,3162,3164,3166,3168,3170,3172,3174,3176,3178,3180,3182,3184,3186,3188,3190],{"productId":201,"scopeText":3155},"Model BTYQ-MS104K-M is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":197,"scopeText":3157},"Model BTYQ-MS104K-L is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":205,"scopeText":3159},"Model BTYQ-MS104K-S1 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":209,"scopeText":3161},"Model BTYQ-MS104K-S2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":213,"scopeText":3163},"Model BTYQ-MS400-S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":217,"scopeText":3165},"Model BTYQ-MS600-S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":221,"scopeText":3167},"Model BTYQ-MS600-S1 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":225,"scopeText":3169},"Model BTYQ-MS600-S2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":229,"scopeText":3171},"Model BTYQ-PTM600-S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":233,"scopeText":3173},"Model BTYQ-PTM600-S2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":185,"scopeText":3175},"Model GTYQ-MIC-500S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":193,"scopeText":3177},"Model GTYQ-MIC-600 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":141,"scopeText":3179},"Model MIC-1000 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":173,"scopeText":3181},"The certificate lists MIC-3000. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":157,"scopeText":3183},"Model MIC-200-UVIR2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":149,"scopeText":3185},"Model MIC-200-IR3 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":161,"scopeText":3187},"Model MIC-200-UVIR3 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":153,"scopeText":3189},"Model MIC-200-IR4 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"productId":165,"scopeText":3191},"Model MIC-200-UVIR4 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.",{"zh-CN":3193},{"Environmental Labeling (Type II) Product Verification Certificate":3194,"Model BTYQ-MS104K-M is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3195,"Model BTYQ-MS104K-L is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3196,"Model BTYQ-MS104K-S1 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3197,"Model BTYQ-MS104K-S2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3198,"Model BTYQ-MS400-S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3199,"Model BTYQ-MS600-S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3200,"Model BTYQ-MS600-S1 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3201,"Model BTYQ-MS600-S2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3202,"Model BTYQ-PTM600-S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3203,"Model BTYQ-PTM600-S2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3204,"Model GTYQ-MIC-500S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3205,"Model GTYQ-MIC-600 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3206,"Model MIC-1000 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3207,"The certificate lists MIC-3000. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3208,"Model MIC-200-UVIR2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3209,"Model MIC-200-IR3 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3210,"Model MIC-200-UVIR3 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3211,"Model MIC-200-IR4 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3212,"Model MIC-200-UVIR4 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB\u002FT 24021-2024 \u002F ISO 14021:2016 and ZTIIPJ01-01-2026.":3213},"中国环境标志（II 型）产品验证证书","证书附件列有 BTYQ-MS104K-M 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 BTYQ-MS104K-L 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 BTYQ-MS104K-S1 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 BTYQ-MS104K-S2 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 BTYQ-MS400-S 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 BTYQ-MS600-S 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 BTYQ-MS600-S1 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 BTYQ-MS600-S2 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 BTYQ-PTM600-S 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 BTYQ-PTM600-S2 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 GTYQ-MIC-500S 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 GTYQ-MIC-600 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 MIC-1000 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书列有 MIC-3000 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 MIC-200-UVIR2 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 MIC-200-IR3 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 MIC-200-UVIR3 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 MIC-200-IR4 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。","证书附件列有 MIC-200-UVIR4 型号。适用范围仅限按 GB\u002FT 24021-2024 \u002F ISO 14021:2016 和 ZTIIPJ01-01-2026 验证的 II 型环境标志声明。",{"id":3215,"scheme":3216,"certificateNumber":3217,"issueDate":3218,"expiryDate":3219,"status":3092,"document":3220,"parties":3223,"scopes":3226,"localizedText":3230},"certificate-zrc23p620030r0s","Fire Product Certification","ZRC23P620030R0S","2023-02-15","2028-02-14",{"sourceFile":3221,"sha256":3222,"pageCount":1879},"3.控制器\u002FMIC-2000-Ex-气体报警控制器\u002F资质认证\u002F可燃气体报警控制器消防产品证书.pdf","51991e4c83adbe2571ba1d8be13a780de3886c895250b3a12ac03a906caaabf5",[3224,3225],{"role":3098,"organizationName":1070},{"role":3152,"organizationName":1070},[3227,3229],{"productId":141,"scopeText":3228},"Exact model transcribed from the certificate PDF.",{"productId":173,"scopeText":3228},{"zh-CN":3231},{"Fire Product Certification":3232,"Exact model transcribed from the certificate PDF.":3233},"消防产品认证","型号按证书原件照录。",{"id":3235,"scheme":3088,"certificateNumber":3236,"issuer":3090,"issueDate":3237,"status":3092,"document":3238,"parties":3241,"scopes":3243,"localizedText":3246},"certificate-2026c508-44","2026C508-44","2026-07-03",{"sourceFile":3239,"sha256":3240,"pageCount":1879},"2.在线式气体检测仪\u002FGTYQ-MIC-600-在线式复合气体检测报警仪\u002F资质认证\u002FCPA证书GTYQ-MIC-600系列(型式批准证书)(2026.7.7).pdf","3d82ed630bd442ad73ccd2e2889985709316b45dcf24dd1a1b1f5c0837656f9f",[3242],{"role":3098,"organizationName":1070},[3244],{"productId":193,"scopeText":3245},"GTYQ-MIC-600 series: GTYQ-MIC-600-CH4-100 0-100 %LEL; GTYQ-MIC-600-CH4-300 3-100 %LEL.",{"zh-CN":3247},{"China Type Approval Certificate (CPA)":3104,"Guangdong Administration for Market Regulation":3105,"GTYQ-MIC-600 series: GTYQ-MIC-600-CH4-100 0-100 %LEL; GTYQ-MIC-600-CH4-300 3-100 %LEL.":3248},"GTYQ-MIC-600 系列：GTYQ-MIC-600-CH4-100 0-100 %LEL；GTYQ-MIC-600-CH4-300 3-100 %LEL。",{"id":3250,"scheme":3088,"certificateNumber":3251,"issuer":3090,"issueDate":3252,"status":3092,"document":3253,"parties":3256,"scopes":3258,"localizedText":3261},"certificate-2026c252-44","2026C252-44","2026-04-14",{"sourceFile":3254,"sha256":3255,"pageCount":1879},"1.便携新品\u002FBTYQ-PTM600-S-手提式多功能气体分析仪\u002F资质认证\u002FCPA证书 BTYQ-PTM600-S CO-H2S-CH4-CO2.pdf","699ab85594fc54c8ae948b21dbca74363daee5670515ddf5f55fc55d7a7ca857",[3257],{"role":3098,"organizationName":1070},[3259],{"productId":229,"scopeText":3260},"BTYQ-PTM600-S: H2S 0-50\u002F100 µmol\u002Fmol; CH4 0-100 %LEL; CO2 0-2500\u002F5000 µmol\u002Fmol; CO 0-500\u002F1000 µmol\u002Fmol.",{"zh-CN":3262},{"China Type Approval Certificate (CPA)":3104,"Guangdong Administration for Market Regulation":3105,"BTYQ-PTM600-S: H2S 0-50\u002F100 µmol\u002Fmol; CH4 0-100 %LEL; CO2 0-2500\u002F5000 µmol\u002Fmol; CO 0-500\u002F1000 µmol\u002Fmol.":3263},"BTYQ-PTM600-S：H₂S 0-50\u002F100 µmol\u002Fmol；CH₄ 0-100 %LEL；CO₂ 0-2500\u002F5000 µmol\u002Fmol；CO 0-500\u002F1000 µmol\u002Fmol。",{"id":3265,"scheme":3088,"certificateNumber":3266,"issuer":3090,"status":3092,"document":3267,"parties":3270,"scopes":3272,"localizedText":3275},"certificate-2026c200-44","2026C200-44",{"sourceFile":3268,"sha256":3269,"pageCount":1879},"1.便携新品\u002FBTYQ-MS600-S2-便携式智能型气体检测仪\u002F资质认证\u002FCPA证书 BTYQ-MS600-S2 二氧化硫.pdf","84f1ea2bbcc97365aedfed86f8f290dd350764eb2b6857078b2b29f674be4bca",[3271],{"role":3098,"organizationName":1070},[3273],{"productId":225,"scopeText":3274},"BTYQ-MS600-S2: SO2 0-50\u002F100 µmol\u002Fmol. Issue day is obscured by the seal and is intentionally omitted.",{"zh-CN":3276},{"China Type Approval Certificate (CPA)":3104,"Guangdong Administration for Market Regulation":3105,"BTYQ-MS600-S2: SO2 0-50\u002F100 µmol\u002Fmol. Issue day is obscured by the seal and is intentionally omitted.":3277},"BTYQ-MS600-S2：SO₂ 0-50\u002F100 µmol\u002Fmol。发证日被印章遮挡，因此不予列出。",{"id":3279,"scheme":3088,"certificateNumber":3280,"issuer":3090,"issueDate":3281,"status":3092,"document":3282,"parties":3285,"scopes":3287,"localizedText":3290},"certificate-2026c080-44","2026C080-44","2026-02-05",{"sourceFile":3283,"sha256":3284,"pageCount":1879},"1.便携新品\u002FBTYQ-MS400-S-便携式四合一气体检测仪\u002FCPA证书 BTYQMS400-S系列-四气体.pdf","48a1ce9121cec0a1e3fdde869515fec4ec5361356e8f91eee081391b89aa010c",[3286],{"role":3098,"organizationName":1070},[3288],{"productId":213,"scopeText":3289},"BTYQ-MS400-S series: CO 0-500\u002F1000 µmol\u002Fmol; SO2 0-50\u002F100 µmol\u002Fmol; H2S 0-50\u002F100 µmol\u002Fmol; CH4 0-100 %LEL.",{"zh-CN":3291},{"China Type Approval Certificate (CPA)":3104,"Guangdong Administration for Market Regulation":3105,"BTYQ-MS400-S series: CO 0-500\u002F1000 µmol\u002Fmol; SO2 0-50\u002F100 µmol\u002Fmol; H2S 0-50\u002F100 µmol\u002Fmol; CH4 0-100 %LEL.":3292},"BTYQ-MS400-S 系列：CO 0-500\u002F1000 µmol\u002Fmol；SO₂ 0-50\u002F100 µmol\u002Fmol；H₂S 0-50\u002F100 µmol\u002Fmol；CH₄ 0-100 %LEL。",{"id":3294,"scheme":3088,"certificateNumber":3295,"issuer":3090,"issueDate":3296,"status":3092,"document":3297,"parties":3300,"scopes":3302,"localizedText":3305},"certificate-2025c582-44","2025C582-44","2025-09-15",{"sourceFile":3298,"sha256":3299,"pageCount":1879},"1.便携新品\u002FBTYQ-MS600-S1----4寸-便携式智能型气体检测仪\u002F资质认证\u002FCPA证书BTYQ-MS600-S1 甲烷.pdf","389ca1021e49df937c0fea9ed770120a1a0c2e228b7ea39159c435844ea69456",[3301],{"role":3098,"organizationName":1070},[3303],{"productId":221,"scopeText":3304},"BTYQ-MS600-S1: methane 0-100 %LEL.",{"zh-CN":3306},{"China Type Approval Certificate (CPA)":3104,"Guangdong Administration for Market Regulation":3105,"BTYQ-MS600-S1: methane 0-100 %LEL.":3307},"BTYQ-MS600-S1：甲烷 0-100 %LEL。",{"id":3309,"scheme":3088,"certificateNumber":3310,"issuer":3090,"issueDate":3296,"status":3092,"document":3311,"parties":3314,"scopes":3316,"localizedText":3319},"certificate-2025c581-44","2025C581-44",{"sourceFile":3312,"sha256":3313,"pageCount":1879},"1.便携新品\u002FBTYQ-MS600-S2-便携式智能型气体检测仪\u002F资质认证\u002FCPA证书 BTYQ-MS600-S2 甲烷.pdf","8cd04aa95de8c915b723d033c0455023958e0c0f5dbeb627857e7604f4076916",[3315],{"role":3098,"organizationName":1070},[3317],{"productId":225,"scopeText":3318},"BTYQ-MS600-S2: methane 0-100 %LEL.",{"zh-CN":3320},{"China Type Approval Certificate (CPA)":3104,"Guangdong Administration for Market Regulation":3105,"BTYQ-MS600-S2: methane 0-100 %LEL.":3321},"BTYQ-MS600-S2：甲烷 0-100 %LEL。",{"id":3323,"scheme":3088,"certificateNumber":3324,"issuer":3090,"issueDate":3325,"status":3092,"document":3326,"parties":3329,"scopes":3331,"localizedText":3334},"certificate-2025c551-44","2025C551-44","2025-09-03",{"sourceFile":3327,"sha256":3328,"pageCount":1879},"1.便携新品\u002FBTYQ-MS600-S2-便携式智能型气体检测仪\u002F资质认证\u002FCPA证书 BTYQ-MS600-S2系列CO H2S CO2.pdf","d0a8a3273d2ee8910fa5924b538837836df7f075ce0893fba0f6e661f49ce3b9",[3330],{"role":3098,"organizationName":1070},[3332],{"productId":225,"scopeText":3333},"BTYQ-MS600-S2: CO 0-500\u002F1000 µmol\u002Fmol; CO2 0-2500\u002F5000 µmol\u002Fmol; H2S 0-50\u002F100 µmol\u002Fmol.",{"zh-CN":3335},{"China Type Approval Certificate (CPA)":3104,"Guangdong Administration for Market Regulation":3105,"BTYQ-MS600-S2: CO 0-500\u002F1000 µmol\u002Fmol; CO2 0-2500\u002F5000 µmol\u002Fmol; H2S 0-50\u002F100 µmol\u002Fmol.":3336},"BTYQ-MS600-S2：CO 0-500\u002F1000 µmol\u002Fmol；CO₂ 0-2500\u002F5000 µmol\u002Fmol；H₂S 0-50\u002F100 µmol\u002Fmol。",{"id":3338,"scheme":3088,"certificateNumber":3339,"issuer":3090,"issueDate":3325,"status":3092,"document":3340,"parties":3343,"scopes":3345,"localizedText":3348},"certificate-2025c550-44","2025C550-44",{"sourceFile":3341,"sha256":3342,"pageCount":1879},"1.便携新品\u002FBTYQ-MS600-S1----4寸-便携式智能型气体检测仪\u002F资质认证\u002FCPA证书 BTYQ-MS600-S1系列CO H2S CO2.pdf","14966c82e87d50b5190be2c11671077c0aba87dd03cf80b62b40f0c7d7869c3e",[3344],{"role":3098,"organizationName":1070},[3346],{"productId":221,"scopeText":3347},"BTYQ-MS600-S1: CO 0-500\u002F1000 µmol\u002Fmol; CO2 0-2500\u002F5000 µmol\u002Fmol; H2S 0-50\u002F100 µmol\u002Fmol.",{"zh-CN":3349},{"China Type Approval Certificate (CPA)":3104,"Guangdong Administration for Market Regulation":3105,"BTYQ-MS600-S1: CO 0-500\u002F1000 µmol\u002Fmol; CO2 0-2500\u002F5000 µmol\u002Fmol; H2S 0-50\u002F100 µmol\u002Fmol.":3350},"BTYQ-MS600-S1：CO 0-500\u002F1000 µmol\u002Fmol；CO₂ 0-2500\u002F5000 µmol\u002Fmol；H₂S 0-50\u002F100 µmol\u002Fmol。",{"id":2268,"scheme":3088,"certificateNumber":3352,"issuer":3090,"status":3092,"document":3353,"parties":3356,"scopes":3358,"localizedText":3361},"2025C147-44",{"sourceFile":3354,"sha256":3355,"pageCount":1879},"1.便携新品\u002FBTYQ-MS104K-S1-便携式气体检测仪\u002FCPA证书 BTYQ-MS104K-S1（一氧化碳）2025.pdf","5dfa1ddea241e8989a618ed4744fd5093725963b8fdc0db13765789781a144b6",[3357],{"role":3098,"organizationName":1070},[3359],{"productId":205,"scopeText":3360},"BTYQ-MS104K-S1: CO 0-1000 µmol\u002Fmol. Issue day is obscured by the seal and is intentionally omitted.",{"zh-CN":3362},{"China Type Approval Certificate (CPA)":3104,"Guangdong Administration for Market Regulation":3105,"BTYQ-MS104K-S1: CO 0-1000 µmol\u002Fmol. Issue day is obscured by the seal and is intentionally omitted.":3363},"BTYQ-MS104K-S1：CO 0-1000 µmol\u002Fmol。发证日被印章遮挡，因此不予列出。",{"id":3365,"scheme":3366,"certificateNumber":3367,"issuer":3368,"issueDate":3369,"expiryDate":3370,"status":3092,"document":3371,"parties":3374,"scopes":3376,"localizedText":3380},"certificate-syex21-10223x","China Explosion-Proof Certificate of Conformity","SYEx21.10223X","Machinery Industry Product Quality Supervision and Test Center of Low-voltage Explosion-proof Electrical Product","2022-01-06","2027-01-05",{"sourceFile":3372,"sha256":3373,"pageCount":1879},"5.火焰探测器\u002FMIC-200-UVIR2-双红外加紫外火焰探测器\u002F资质认证\u002FMIC-200-UVIR2防爆合格证  点型红外火焰探测器.pdf","dec5c90c062272bc768f6d4f6863342b0fdea9e1369d86c20e28fb80d2592dee",[3375],{"role":3152,"organizationName":1070},[3377],{"productId":157,"explosionMarking":3378,"scopeText":3379},"Ex d IIC T6 Gb; Ex tD A21 IP68 T80°C","MIC-200-UVIR2; certificate also lists representative IR3, UVIR3 and IR4 models, which are not inferred as this product's scope.",{"zh-CN":3381},{"China Explosion-Proof Certificate of Conformity":3382,"Machinery Industry Product Quality Supervision and Test Center of Low-voltage Explosion-proof Electrical Product":3383,"MIC-200-UVIR2; certificate also lists representative IR3, UVIR3 and IR4 models, which are not inferred as this product's scope.":3384},"防爆合格证","机械工业低压防爆电器产品质量监督检测中心","MIC-200-UVIR2；证书另列有代表型号 IR3、UVIR3 和 IR4，不据此推定为本产品的适用范围。",{"id":3386,"scheme":3366,"certificateNumber":3387,"issuer":3388,"issueDate":3389,"expiryDate":3390,"status":3092,"document":3391,"parties":3394,"scopes":3396,"localizedText":3400},"certificate-ce24-5822x","CE24.5822X","National Explosion-proof Product Quality Inspection and Testing Center (Tianjin)","2024-12-19","2029-12-19",{"sourceFile":3392,"sha256":3393,"pageCount":2459},"2.在线式气体检测仪\u002FGTYQ-MIC-600-在线式复合气体检测报警仪\u002F资质认证\u002FGTYQ-MIC-600防爆合格证-深圳市逸云天电子有限公司(1).pdf","9178e6369054c4a67b0ba7465043b6bbc9dc184778b6be1e5bdd52a2f6627256",[3395],{"role":3114,"organizationName":1070},[3397],{"productId":193,"explosionMarking":3398,"scopeText":3399},"Ex da ia IIC T6 Ga","GTYQ-MIC-600; annex reviewed, including DC24V, RS485 intrinsic-safety parameters and -20°C to +55°C ambient range.",{"zh-CN":3401},{"China Explosion-Proof Certificate of Conformity":3382,"National Explosion-proof Product Quality Inspection and Testing Center (Tianjin)":3402,"GTYQ-MIC-600; annex reviewed, including DC24V, RS485 intrinsic-safety parameters and -20°C to +55°C ambient range.":3403},"国家防爆产品质量检验检测中心（天津）","GTYQ-MIC-600；已核对附件，包括 DC24V、RS485 本安参数和 -20°C 至 +55°C 环境温度范围。",{"id":3405,"scheme":3366,"certificateNumber":3406,"issuer":3388,"issueDate":3389,"expiryDate":3390,"status":3092,"document":3407,"parties":3410,"scopes":3412,"localizedText":3415},"certificate-ce24-5821x","CE24.5821X",{"sourceFile":3408,"sha256":3409,"pageCount":2459},"2.在线式气体检测仪\u002FGTYQ-MIC-500S-在线式单一气体检测报警仪\u002F资质认证\u002FGTYQ-MIC-500S防爆合格证-深圳市逸云天电子有限公司(1).pdf","23b8a14434a4290c569eeb60e2f92820d43b3cf69db7cfe3b11b2dbd9cc191ad",[3411],{"role":3114,"organizationName":1070},[3413],{"productId":185,"explosionMarking":3398,"scopeText":3414},"GTYQ-MIC-500S; annex reviewed, including DC24V, RS485 intrinsic-safety parameters and -20°C to +55°C ambient range.",{"zh-CN":3416},{"China Explosion-Proof Certificate of Conformity":3382,"National Explosion-proof Product Quality Inspection and Testing Center (Tianjin)":3402,"GTYQ-MIC-500S; annex reviewed, including DC24V, RS485 intrinsic-safety parameters and -20°C to +55°C ambient range.":3417},"GTYQ-MIC-500S；已核对附件，包括 DC24V、RS485 本安参数和 -20°C 至 +55°C 环境温度范围。",{"id":3419,"scheme":3366,"certificateNumber":3420,"issuer":3388,"issueDate":3421,"expiryDate":3422,"status":3092,"document":3423,"parties":3426,"scopes":3428,"localizedText":3432},"certificate-ce23-5160x","CE23.5160X","2023-11-02","2028-11-02",{"sourceFile":3424,"sha256":3425,"pageCount":1879},"2.在线式气体检测仪\u002FGTYQ-MIC-500S-在线式单一气体检测报警仪\u002F资质认证\u002FGTYQ-MIC-500S防爆合格证 隔爆和粉尘防爆 工业及商业用途点型可燃气体探测器.pdf","c706cb3c41ad1297dc79aa96f14273de89e0284c2e99cfc08e75552703f7bfee",[3427],{"role":3114,"organizationName":1070},[3429],{"productId":185,"explosionMarking":3430,"scopeText":3431},"Ex db IIC T6 Gb; Ex tb IIIC T80°C Db","GTYQ-MIC series; the certificate note explicitly defines 500S and drawing GTYQ-MIC-500S-00.",{"zh-CN":3433},{"China Explosion-Proof Certificate of Conformity":3382,"National Explosion-proof Product Quality Inspection and Testing Center (Tianjin)":3402,"GTYQ-MIC series; the certificate note explicitly defines 500S and drawing GTYQ-MIC-500S-00.":3434},"GTYQ-MIC 系列；证书备注明确列出 500S 及图号 GTYQ-MIC-500S-00。",{"id":3436,"scheme":3366,"certificateNumber":3437,"issuer":3438,"issueDate":3439,"expiryDate":3440,"status":3092,"document":3441,"parties":3444,"scopes":3447,"localizedText":3451},"certificate-ccri-26-2601x","CCRI 26.2601X","CCRI Testing Technology Co., Ltd. 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(Beijing)":3453},{"id":3498,"scheme":3366,"certificateNumber":3499,"issuer":3438,"issueDate":3500,"expiryDate":3501,"status":3092,"document":3502,"parties":3505,"scopes":3508,"localizedText":3512},"certificate-ccri-25-7407x","CCRI 25.7407X","2026-01-20","2031-01-19",{"sourceFile":3503,"sha256":3504,"pageCount":2459},"1.便携新品\u002FBTYQ-MS600-S2-便携式智能型气体检测仪\u002F资质认证\u002F防爆证BTYQ-MS600-S2 Ex da ia IIC T6 Ga.pdf","75e17bee0327faeb3d95d1b7858ba1487ea2671b4902ad897533507868a1b22e",[3506,3507],{"role":3114,"organizationName":1070},{"role":3152,"organizationName":1070},[3509,3511],{"productId":221,"explosionMarking":3510,"scopeText":3228},"Ex da ia ⅡC T6 Ga",{"productId":225,"explosionMarking":3510,"scopeText":3228},{"zh-CN":3513},{"Exact model transcribed from the certificate PDF.":3233,"China Explosion-Proof Certificate of Conformity":3382,"CCRI Testing Technology Co., Ltd. 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(Beijing)":3453},{"id":3596,"scheme":3366,"certificateNumber":3597,"issuer":3438,"issueDate":3598,"expiryDate":3599,"status":3092,"document":3600,"parties":3603,"scopes":3606,"localizedText":3610},"certificate-ccri-25-2156x","CCRI 25.2156X","2025-03-21","2030-03-20",{"sourceFile":3601,"sha256":3602,"pageCount":2459},"1.便携新品\u002FBTYQ-MS400-S-便携式四合一气体检测仪\u002F防爆证BTYQ-MS400-S Ex da ia I Ma+Ex da ia IIC T4 Ga.pdf","82b9ae8e6c462b04369f73206315b30c4f008c8ee8e5333f4b2526804264436b",[3604,3605],{"role":3114,"organizationName":1070},{"role":3152,"organizationName":1070},[3607,3609],{"productId":213,"explosionMarking":3608,"scopeText":3228},"Ex da ia I Ma \u002F Ex da ia ⅡC T4 Ga",{"productId":217,"explosionMarking":3608,"scopeText":3228},{"zh-CN":3611},{"Exact model transcribed from the certificate PDF.":3233,"China Explosion-Proof Certificate of Conformity":3382,"CCRI Testing Technology Co., Ltd. (Beijing)":3453},{"id":3613,"scheme":3366,"certificateNumber":3614,"issuer":3438,"issueDate":3581,"expiryDate":3615,"status":3092,"document":3616,"parties":3619,"scopes":3622,"localizedText":3625},"certificate-ccri-24-7313x","CCRI 24.7313X","2029-11-07",{"sourceFile":3617,"sha256":3618,"pageCount":2459},"1.便携新品\u002FBTYQ-PTM600-S-手提式多功能气体分析仪\u002F资质认证\u002F防爆证 BTYQ-PTM600-S Ex ia I Ma+Ex ia ⅡC T4 Ga+Ex ia ⅢC T200 130℃ Da.pdf","673984eadb5b256ea6964076c7dda511151cb7a2defce8482730abc56940ced7",[3620,3621],{"role":3114,"organizationName":1070},{"role":3152,"organizationName":1070},[3623,3624],{"productId":229,"explosionMarking":3591,"scopeText":3228},{"productId":233,"explosionMarking":3591,"scopeText":3228},{"zh-CN":3626},{"Exact model transcribed from the certificate PDF.":3233,"China Explosion-Proof Certificate of Conformity":3382,"CCRI Testing Technology Co., Ltd. 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Use with the registration certificate.",{"id":3985,"slug":3986,"type":3920,"status":3921,"productIds":3987,"gasIds":3988,"industryIds":3989,"applicationIds":3990,"certificateIds":3991,"marketContent":3992},"resource-company-trademark-81922942","company-trademark-81922942",[],[],[],[],[],[3993],{"market":17,"locale":18,"publication":3994,"title":3995,"summary":3996},{"status":663,"indexable":3930},"China - 逸云天 trademark registration","Registration No. 81922942. Nice class 9.",{"id":3998,"slug":3999,"type":3920,"status":3921,"productIds":4000,"gasIds":4001,"industryIds":4002,"applicationIds":4003,"certificateIds":4004,"marketContent":4005},"resource-company-trademark-74553369","company-trademark-74553369",[],[],[],[],[],[4006],{"market":17,"locale":18,"publication":4007,"title":4008,"summary":4009},{"status":663,"indexable":3930},"China - Eranntex and 逸云天 trademark registration","Registration No. 74553369. Nice classes 9, 35.",{"id":4011,"slug":4012,"type":3920,"status":3921,"productIds":4013,"gasIds":4014,"industryIds":4015,"applicationIds":4016,"certificateIds":4017,"marketContent":4018},"resource-company-trademark-74562363","company-trademark-74562363",[],[],[],[],[],[4019],{"market":17,"locale":18,"publication":4020,"title":4021,"summary":4022},{"status":663,"indexable":3930},"China - Eranntex and 逸云天电子 trademark registration","Registration No. 74562363. Nice classes 9, 35.",{"productIds":4024,"gasIds":4025,"industryIds":4026,"applicationIds":4027,"id":4028,"slug":4029,"type":4030,"status":3921,"language":316,"revision":4031,"issueDate":4032,"media":4033,"download":4040,"certificateIds":4045,"marketContent":4046,"sources":4051},[185],[],[],[],"resource-mic-500s-ch4-type-evaluation-hyq202638541","mic-500s-ch4-type-evaluation-hyq202638541","test_report","HYQ202638541","2026-10-13",{"id":4034,"url":4035,"alt":4036,"width":4037,"height":4038,"mimeType":4039},"media-mic-500s-ch4-type-evaluation-hyq202638541-preview","\u002Fimages\u002Fdocuments\u002Ftest-reports\u002Fmic-500s-ch4-type-evaluation-hyq202638541.jpg","Preview of type-evaluation report HYQ202638541 for the GTYQ-MIC-500S methane series",1072,1517,"image\u002Fjpeg",{"id":4041,"url":4042,"alt":4043,"mimeType":4044},"file-mic-500s-ch4-type-evaluation-hyq202638541","\u002Fdocuments\u002Ftest-reports\u002Fmic-500s-ch4-type-evaluation-hyq202638541.pdf","Type-evaluation report HYQ202638541 PDF (Chinese)","application\u002Fpdf",[3087],[4047],{"market":17,"locale":18,"publication":4048,"title":4049,"summary":4050},{"status":663,"indexable":3930},"Methane Type-Evaluation Report HYQ202638541","Guangdong Institute of Metrology type evaluation for CPA 2026C743-44, tested on six GTYQ-MIC-500S-CH4-100 units with a catalytic sensor at 20–24 °C. All applicable items passed, including indication error within ±5 %FS and a measured response time of 10–12 s. Laboratory results for the tested units.",[],{"productIds":4053,"gasIds":4054,"industryIds":4055,"applicationIds":4056,"id":4057,"slug":3087,"type":3920,"status":3921,"language":316,"issueDate":3091,"media":4058,"download":4064,"certificateIds":4068,"marketContent":4069,"sources":4073},[],[],[],[],"resource-certificate-2026c743-44",{"id":4059,"url":4060,"alt":4061,"width":4062,"height":4063,"mimeType":4039},"media-certificate-2026c743-44-preview","\u002Fimages\u002Fcertificates\u002Fproducts\u002Fcertificate-2026c743-44.jpg","Preview of China Type Approval Certificate (CPA) 2026C743-44",2286,1622,{"id":4065,"url":4066,"alt":4067,"mimeType":4044},"file-certificate-2026c743-44","\u002Fdocuments\u002Fcertificates\u002Fcertificate-2026c743-44.pdf","China Type Approval Certificate (CPA) 2026C743-44 PDF",[3087],[4070],{"market":17,"locale":18,"publication":4071,"title":4072},{"status":663,"indexable":3930},"China Type Approval Certificate (CPA) 2026C743-44",[],{"productIds":4075,"gasIds":4076,"industryIds":4077,"applicationIds":4078,"id":4079,"slug":4080,"type":4030,"status":3921,"language":316,"revision":4081,"issueDate":4082,"media":4083,"download":4089,"certificateIds":4093,"marketContent":4094,"sources":4099},[209],[],[],[],"resource-ms104k-s2-sgs-drop-test-gzmr261003754301-zh-cn","ms104k-s2-sgs-drop-test-gzmr261003754301-zh-cn","GZMR261003754301_CN","2026-10-16",{"id":4084,"url":4085,"alt":4086,"width":4087,"height":4088,"mimeType":1220},"media-ms104k-s2-drop-test-7m-gzmr261003754301-cn-preview","\u002Fimages\u002Fcertificates\u002Fms104k-s2\u002Fdrop-test-7m-gzmr261003754301-cn.png","Preview of Chinese 7 m free-fall test report GZMR261003754301_CN for BTYQ-MS104K-S2",910,1287,{"id":4090,"url":4091,"alt":4092,"mimeType":4044},"file-ms104k-s2-drop-test-7m-gzmr261003754301-cn","\u002Fdocuments\u002Fproducts\u002Fms104k-s2\u002Fbtyq-ms104k-s2-drop-test-7m-gzmr261003754301-cn.pdf","Chinese 7 m free-fall test report GZMR261003754301_CN PDF",[],[4095],{"market":17,"locale":18,"publication":4096,"title":4097,"summary":4098},{"status":663,"indexable":3930},"7 m Free-Fall Test Report — Chinese","Chinese-language version (GZMR261003754301_CN) of the same SGS 7 m free-fall test on one BTYQ-MS104K-S2 sample. The pass criterion was that the sample could be switched on after the drops; gas measurement accuracy after impact was not tested. Results apply only to the tested sample. CNAS and CMA marks identify the laboratory, not a product certification.",[],{"productIds":4101,"gasIds":4102,"industryIds":4103,"applicationIds":4104,"id":4105,"slug":4106,"type":4030,"status":3921,"language":18,"revision":4107,"issueDate":4082,"media":4108,"download":4112,"certificateIds":4116,"marketContent":4117,"sources":4122},[209],[],[],[],"resource-ms104k-s2-sgs-drop-test-gzmr261003754301-en","ms104k-s2-sgs-drop-test-gzmr261003754301-en","GZMR261003754301",{"id":4109,"url":4110,"alt":4111,"width":4087,"height":4088,"mimeType":1220},"media-ms104k-s2-drop-test-7m-gzmr261003754301-en-preview","\u002Fimages\u002Fcertificates\u002Fms104k-s2\u002Fdrop-test-7m-gzmr261003754301-en.png","Preview of English 7 m free-fall test report GZMR261003754301 for BTYQ-MS104K-S2",{"id":4113,"url":4114,"alt":4115,"mimeType":4044},"file-ms104k-s2-drop-test-7m-gzmr261003754301-en","\u002Fdocuments\u002Fproducts\u002Fms104k-s2\u002Fbtyq-ms104k-s2-drop-test-7m-gzmr261003754301-en.pdf","English 7 m free-fall test report GZMR261003754301 PDF",[],[4118],{"market":17,"locale":18,"publication":4119,"title":4120,"summary":4121},{"status":663,"indexable":3930},"7 m Free-Fall Test Report — English","SGS test report GZMR261003754301 for one BTYQ-MS104K-S2 sample: free fall from 7 m onto a steel plate, 3 drops, GB\u002FT 2423.7-2018 Procedure 1. The pass criterion was that the sample could be switched on after the drops; gas measurement accuracy after impact was not tested. Results apply only to the tested sample. CNAS and CMA marks identify the laboratory, not a product certification.",[],{"productIds":4124,"gasIds":4125,"industryIds":4126,"applicationIds":4127,"id":4128,"slug":4129,"type":4030,"status":3921,"language":316,"revision":4130,"issueDate":4131,"media":4132,"download":4136,"certificateIds":4140,"marketContent":4141,"sources":4146},[209],[],[],[],"resource-ms104k-s2-sgs-drop-test-gzmr260903639401-zh-cn","ms104k-s2-sgs-drop-test-gzmr260903639401-zh-cn","GZMR260903639401_CN","2026-10-09",{"id":4133,"url":4134,"alt":4135,"width":4087,"height":4088,"mimeType":1220},"media-ms104k-s2-drop-test-1-5m-gzmr260903639401-cn-preview","\u002Fimages\u002Fcertificates\u002Fms104k-s2\u002Fdrop-test-1-5m-gzmr260903639401-cn.png","Preview of Chinese 1.5 m free-fall test report GZMR260903639401_CN for BTYQ-MS104K-S2",{"id":4137,"url":4138,"alt":4139,"mimeType":4044},"file-ms104k-s2-drop-test-1-5m-gzmr260903639401-cn","\u002Fdocuments\u002Fproducts\u002Fms104k-s2\u002Fbtyq-ms104k-s2-drop-test-1-5m-gzmr260903639401-cn.pdf","Chinese 1.5 m free-fall test report GZMR260903639401_CN PDF",[],[4142],{"market":17,"locale":18,"publication":4143,"title":4144,"summary":4145},{"status":663,"indexable":3930},"1.5 m Free-Fall Test Report — Chinese","Chinese-language version (GZMR260903639401_CN) of the same SGS 1.5 m free-fall test on one BTYQ-MS104K-S2 sample. The pass criterion was that the sample could be switched on after the drops; gas measurement accuracy after impact was not tested. Results apply only to the tested sample. CNAS and CMA marks identify the laboratory, not a product certification.",[],{"productIds":4148,"gasIds":4149,"industryIds":4150,"applicationIds":4151,"id":4152,"slug":4153,"type":4030,"status":3921,"language":18,"revision":4154,"issueDate":4131,"media":4155,"download":4159,"certificateIds":4163,"marketContent":4164,"sources":4169},[209],[],[],[],"resource-ms104k-s2-sgs-drop-test-gzmr260903639401-en","ms104k-s2-sgs-drop-test-gzmr260903639401-en","GZMR260903639401",{"id":4156,"url":4157,"alt":4158,"width":4087,"height":4088,"mimeType":1220},"media-ms104k-s2-drop-test-1-5m-gzmr260903639401-en-preview","\u002Fimages\u002Fcertificates\u002Fms104k-s2\u002Fdrop-test-1-5m-gzmr260903639401-en.png","Preview of English 1.5 m free-fall test report GZMR260903639401 for BTYQ-MS104K-S2",{"id":4160,"url":4161,"alt":4162,"mimeType":4044},"file-ms104k-s2-drop-test-1-5m-gzmr260903639401-en","\u002Fdocuments\u002Fproducts\u002Fms104k-s2\u002Fbtyq-ms104k-s2-drop-test-1-5m-gzmr260903639401-en.pdf","English 1.5 m free-fall test report GZMR260903639401 PDF",[],[4165],{"market":17,"locale":18,"publication":4166,"title":4167,"summary":4168},{"status":663,"indexable":3930},"1.5 m Free-Fall Test Report — English","SGS test report GZMR260903639401 for one BTYQ-MS104K-S2 sample: free fall from 1.5 m onto a steel plate, 3 drops, GB\u002FT 2423.7-2018 Procedure 1. The pass criterion was that the sample could be switched on after the drops; gas measurement accuracy after impact was not tested. Results apply only to the tested sample. CNAS and CMA marks identify the laboratory, not a product certification.",[],{"productIds":4171,"gasIds":4172,"industryIds":4173,"applicationIds":4174,"id":297,"slug":4175,"type":1048,"status":3921,"language":18,"revision":4176,"issueDate":4177,"author":4178,"media":4179,"certificateIds":4186,"marketContent":4187,"sources":5516},[201,213],[],[],[],"what-does-a-4-gas-monitor-detect","w04-revision20-local-20261023","2026-10-23","Eranntex Technical Team",{"id":4180,"url":4181,"alt":4182,"width":4183,"height":4184,"mimeType":705,"roles":4185},"media-w04-four-gas-monitor-editorial-cover","\u002Fimages\u002Fresources\u002Fwhat-does-a-4-gas-monitor-detect-eranntex.webp","Eranntex technical guide cover: What does a 4-gas monitor detect? Product photographs of the BTYQ-MS104K-M and BTYQ-MS400-S portable gas detectors.",1672,941,[708],[],[4188],{"market":17,"locale":18,"publication":4189,"title":4190,"summary":4191,"body":4192,"faq":5499,"seo":5512,"mediaLayout":5515,"reviewedOnPublication":10},{"status":663,"indexable":10},"What Does a 4-Gas Monitor Detect? Gases, Limits & Selection","A common 4-gas monitor measures oxygen, carbon monoxide, hydrogen sulfide and combustible gas as %LEL. Those readings cover different hazards: they do not measure CO₂, and a low %LEL reading does not establish that solvent exposure is acceptable. Start with the gases present, then choose the measuring ranges and sampling method.",[4193,4339,4578,4756,4913,5153,5222,5266],{"id":4194,"heading":4195,"paragraphs":4196,"blocks":4201},"four-gas-readings","What do the four readings tell you?",[4197,4198,4199,4200],"The four readings use different units. Oxygen is reported as percent by volume, while CO and H₂S are reported in parts per million (ppm). The combustible-gas scale is a percentage of the lower explosive limit (LEL) of the calibration gas. [S1] These readings answer different questions, so one cannot stand in for another.","For CO and H₂S, a current reading and an exposure average describe different things. A peak shows a concentration reached during monitoring; a time-weighted average includes how long the concentration persisted. [S2] That distinction matters when an instrument records a brief high reading but a much lower average. The H₂S peak and TWA record guide works through that comparison.","Before comparing an exposure limit with a reading, identify the time period each represents. The US references below distinguish a time-weighted average (TWA), a short-term exposure limit (STEL) and a ceiling. [S2] Those references are not proposed factory alarm settings.","For BTYQ-MS104K-M and BTYQ-MS400-S, our specifications list low, high, range and TWA\u002FSTEL alarm modes. [S3] The supplied modes and set points belong in the quotation, with the gas combination and measuring ranges. Alarm settings must follow the applicable jurisdiction and site program; the mode list alone does not establish those settings.",[4202,4212,4292,4302,4309,4330],{"kind":4203,"content":4204},"paragraph",[4205,4207,4210],{"text":4206},"The four readings use different units. Oxygen is reported as percent by volume, while CO and H₂S are reported in parts per million (ppm). The combustible-gas scale is a percentage of the lower explosive limit (LEL) of the calibration gas. ",{"text":4208,"href":4209,"citation":10},"[S1]","#ref-s1",{"text":4211}," These readings answer different questions, so one cannot stand in for another.",{"kind":4213,"caption":4214,"headers":4215,"rows":4225,"source":4282},"table","What each reading answers and what it does not",[4216,4219,4222],[4217],{"text":4218},"Reading",[4220],{"text":4221},"What the reading answers",[4223],{"text":4224},"What the reading does not answer",[4226,4242,4253,4267],{"cells":4227},[4228,4231,4234],[4229],{"text":4230},"Oxygen (O₂), % vol",[4232],{"text":4233},"Whether the air is oxygen-deficient or oxygen-enriched.",[4235,4237,4240],{"text":4236},"Which gas displaced the oxygen, or how much CO₂ is present. See the ",{"text":4238,"href":4239},"CO₂ section","#carbon-dioxide-blind-spot",{"text":4241},".",{"cells":4243},[4244,4247,4250],[4245],{"text":4246},"Carbon monoxide (CO), ppm",[4248],{"text":4249},"The current CO concentration at the sensor.",[4251],{"text":4252},"A time-weighted average, unless the instrument calculates one over a stated period.",{"cells":4254},[4255,4258,4261],[4256],{"text":4257},"Hydrogen sulfide (H₂S), ppm",[4259],{"text":4260},"The current H₂S concentration at the sensor.",[4262,4264,4266],{"text":4263},"How a recorded peak relates to a TWA. See the ",{"text":4265,"href":270},"H₂S peak and TWA record guide",{"text":4241},{"cells":4268},[4269,4272,4275],[4270],{"text":4271},"Combustible gas, %LEL",[4273],{"text":4274},"Flammability relative to the LEL of the calibration gas.",[4276,4278,4281],{"text":4277},"Toxic exposure to the same vapor. See the ",{"text":4279,"href":4280},"solvent section","#solvent-vapor-exposure",{"text":4241},[4283,4285,4286,4288,4291],{"text":4284},"Sources: ",{"text":4208,"citation":10,"href":4209},{"text":4287}," ",{"text":4289,"citation":10,"href":4290},"[S2]","#ref-s2",{"text":4241},{"kind":4203,"content":4293},[4294,4296,4297,4299,4300],{"text":4295},"For CO and H₂S, a current reading and an exposure average describe different things. A peak shows a concentration reached during monitoring; a time-weighted average includes how long the concentration persisted. ",{"text":4289,"href":4290,"citation":10},{"text":4298}," That distinction matters when an instrument records a brief high reading but a much lower average. The ",{"text":4265,"href":270},{"text":4301}," works through that comparison.",{"kind":4203,"content":4303},[4304,4306,4307],{"text":4305},"Before comparing an exposure limit with a reading, identify the time period each represents. The US references below distinguish a time-weighted average (TWA), a short-term exposure limit (STEL) and a ceiling. ",{"text":4289,"href":4290,"citation":10},{"text":4308}," Those references are not proposed factory alarm settings.",{"kind":4310,"ordered":3930,"items":4311},"list",[4312,4318,4324],[4313,4315,4317],{"text":4314,"strong":10},"TWA:",{"text":4316}," a time-weighted average over a stated period. ",{"text":4289,"citation":10,"href":4290},[4319,4321,4323],{"text":4320,"strong":10},"STEL:",{"text":4322}," a short-term average, usually over 15 minutes. ",{"text":4289,"citation":10,"href":4290},[4325,4327,4329],{"text":4326,"strong":10},"Ceiling:",{"text":4328}," a value that should not be exceeded at any time. ",{"text":4289,"citation":10,"href":4290},{"kind":4203,"content":4331},[4332,4334,4337],{"text":4333},"For BTYQ-MS104K-M and BTYQ-MS400-S, our specifications list low, high, range and TWA\u002FSTEL alarm modes. ",{"text":4335,"href":4336,"citation":10},"[S3]","#ref-s3",{"text":4338}," The supplied modes and set points belong in the quotation, with the gas combination and measuring ranges. Alarm settings must follow the applicable jurisdiction and site program; the mode list alone does not establish those settings.",{"id":4340,"heading":4341,"paragraphs":4342,"blocks":4350},"co-range-accuracy","How do measuring range and accuracy affect the CO reading?",[4343,4344,4345,4346,4347,4348,4349],"Choose a CO range that covers the concentrations the job requires, then assess accuracy near the readings used for alarms or exposure assessment. A wider range can cover higher concentrations, but it does not necessarily give the same absolute error at low concentrations. Our model documents list the following gas and range options for BTYQ-MS104K-M and BTYQ-MS400-S. [S4]","The difference is easy to see when accuracy is expressed as a percentage of full scale (FS), the upper end of the measuring range. Our specification table gives a typical accuracy of ±3%FS, with higher-accuracy sensors available as an option. [S3] At that rating, 0–100 ppm gives an absolute tolerance of ±3 ppm, while 0–1000 ppm gives ±30 ppm. [S3; calculation] Display resolution is the smallest displayed step; extra decimal places do not reduce that tolerance.","NIOSH recommends 35 ppm as a CO TWA and 200 ppm as a ceiling. The OSHA permissible exposure limit is 50 ppm as a TWA. [S5] The narrower range reduces the calculated error at the same %FS rating, but cannot cover a 200 ppm event. The choice therefore depends on both required coverage and the applicable error specification.","Our CO type-evaluation reports give a different error statement: a maximum permissible error (MPE) of ±5 μmol\u002Fmol or ±10% for the 0–1000 μmol\u002Fmol configuration. [S6] [S7] Those reports record tests at 150, 300 and 700 μmol\u002Fmol, rather than near 35 ppm. They provide evidence for the wider range under the reported laboratory conditions, but do not establish its error at every lower concentration.","Across the reported CO test points, the results ranged from −1.7% to +5.3% of the reference gas. [S6] [S7] The tests covered 20–24 °C, whereas our typical operating range is −20 to +55 °C and 10–95 %RH. [S3] [S6] [S7] A purchase specification that depends on a low CO reading at another temperature needs performance evidence for that condition.","The calculator below answers a narrower question: which listed ranges satisfy a chosen concentration and error requirement if the stated %FS figure applies? With a rating of ±q%FS, the range must satisfy Cmax ≤ FS ≤ 100 × E ÷ q. Here Cmax is the highest required concentration and E is the permitted absolute error in ppm. [S3; calculation]","For example, covering 200 ppm while limiting absolute error to ±5 ppm gives no solution at ±3%FS. [S3; calculation] That result rules out the stated %FS specification for the task; it does not rule out a different documented accuracy specification. Any alternative still needs evidence for the concentration and conditions required by the job.",[4351,4358,4436,4447,4456,4469,4533,4549,4554,4571],{"kind":4203,"content":4352},[4353,4355],{"text":4354},"Choose a CO range that covers the concentrations the job requires, then assess accuracy near the readings used for alarms or exposure assessment. A wider range can cover higher concentrations, but it does not necessarily give the same absolute error at low concentrations. Our model documents list the following gas and range options for BTYQ-MS104K-M and BTYQ-MS400-S. ",{"text":4356,"href":4357,"citation":10},"[S4]","#ref-s4",{"kind":4213,"caption":4359,"headers":4360,"rows":4370,"source":4432},"Selected gas and range options for BTYQ-MS104K-M and BTYQ-MS400-S",[4361,4364,4367],[4362],{"text":4363},"Measurement",[4365],{"text":4366},"Measuring range",[4368],{"text":4369},"Display resolution",[4371,4382,4393,4403,4413,4421],{"cells":4372},[4373,4376,4379],[4374],{"text":4375},"Oxygen (O₂)",[4377],{"text":4378},"0–30% vol",[4380],{"text":4381},"0.01% vol",{"cells":4383},[4384,4387,4390],[4385],{"text":4386},"Carbon monoxide (CO)",[4388],{"text":4389},"0–100 ppm",[4391],{"text":4392},"0.01 ppm",{"cells":4394},[4395,4397,4400],[4396],{"text":4386},[4398],{"text":4399},"0–1000 ppm",[4401],{"text":4402},"0.1 ppm",{"cells":4404},[4405,4408,4411],[4406],{"text":4407},"Hydrogen sulfide (H₂S)",[4409],{"text":4410},"0–10 ppm",[4412],{"text":4392},{"cells":4414},[4415,4417,4419],[4416],{"text":4407},[4418],{"text":4389},[4420],{"text":4392},{"cells":4422},[4423,4426,4429],[4424],{"text":4425},"Combustible gas",[4427],{"text":4428},"0–100%LEL",[4430],{"text":4431},"0.1%LEL",[4433,4434,4435],{"text":4284},{"text":4356,"citation":10,"href":4357},{"text":4241},{"kind":4203,"content":4437},[4438,4440,4441,4443,4445],{"text":4439},"The difference is easy to see when accuracy is expressed as a percentage of full scale (FS), the upper end of the measuring range. Our specification table gives a typical accuracy of ±3%FS, with higher-accuracy sensors available as an option. ",{"text":4335,"href":4336,"citation":10},{"text":4442}," At that rating, 0–100 ppm gives an absolute tolerance of ±3 ppm, while 0–1000 ppm gives ±30 ppm. ",{"text":4444,"href":4336,"citation":10},"[S3; calculation]",{"text":4446}," Display resolution is the smallest displayed step; extra decimal places do not reduce that tolerance.",{"kind":4203,"content":4448},[4449,4451,4454],{"text":4450},"NIOSH recommends 35 ppm as a CO TWA and 200 ppm as a ceiling. The OSHA permissible exposure limit is 50 ppm as a TWA. ",{"text":4452,"href":4453,"citation":10},"[S5]","#ref-s5",{"text":4455}," The narrower range reduces the calculated error at the same %FS rating, but cannot cover a 200 ppm event. The choice therefore depends on both required coverage and the applicable error specification.",{"kind":4203,"content":4457},[4458,4460,4463,4464,4467],{"text":4459},"Our CO type-evaluation reports give a different error statement: a maximum permissible error (MPE) of ±5 μmol\u002Fmol or ±10% for the 0–1000 μmol\u002Fmol configuration. ",{"text":4461,"href":4462,"citation":10},"[S6]","#ref-s6",{"text":4287},{"text":4465,"href":4466,"citation":10},"[S7]","#ref-s7",{"text":4468}," Those reports record tests at 150, 300 and 700 μmol\u002Fmol, rather than near 35 ppm. They provide evidence for the wider range under the reported laboratory conditions, but do not establish its error at every lower concentration.",{"kind":4213,"caption":4470,"headers":4471,"rows":4484,"source":4524},"CO accuracy specifications: calculated tolerance and laboratory evidence",[4472,4475,4478,4481],[4473],{"text":4474},"Error statement",[4476],{"text":4477},"Range",[4479],{"text":4480},"What is established near 35 ppm?",[4482],{"text":4483},"Conditions and limits",[4485,4498,4510],{"cells":4486},[4487,4490,4492,4495],[4488],{"text":4489},"Specification table, typical ±3%FS",[4491],{"text":4389},[4493],{"text":4494},"±3 ppm",[4496],{"text":4497},"Typical value; test conditions not stated. Cannot read a 200 ppm ceiling event.",{"cells":4499},[4500,4502,4504,4507],[4501],{"text":4489},[4503],{"text":4399},[4505],{"text":4506},"±30 ppm",[4508],{"text":4509},"Typical value; test conditions not stated.",{"cells":4511},[4512,4515,4518,4521],[4513],{"text":4514},"Type-evaluation MPE: ±5 μmol\u002Fmol or ±10%",[4516],{"text":4517},"0–1000 μmol\u002Fmol",[4519],{"text":4520},"Not tested near 35 ppm. The report states ±5 μmol\u002Fmol or ±10%. ",[4522],{"text":4523},"Three units per model tested at 150, 300 and 700 μmol\u002Fmol. BTYQ-MS104K-M: 20–24 °C, 35–55 %RH. BTYQ-MS400-S: 21–23 °C, 55 %RH. ",[4525,4526,4527,4528,4529,4530,4531],{"text":4284},{"text":4335,"citation":10,"href":4336},{"text":4287},{"text":4461,"citation":10,"href":4462},{"text":4287},{"text":4465,"citation":10,"href":4466},{"text":4532},". Calculated values use the method and assumptions given in the text.",{"kind":4203,"content":4534},[4535,4537,4538,4539,4540,4542,4543,4544,4545,4546,4547],{"text":4536},"Across the reported CO test points, the results ranged from −1.7% to +5.3% of the reference gas. ",{"text":4461,"href":4462,"citation":10},{"text":4287},{"text":4465,"href":4466,"citation":10},{"text":4541}," The tests covered 20–24 °C, whereas our typical operating range is −20 to +55 °C and 10–95 %RH. ",{"text":4335,"href":4336,"citation":10},{"text":4287},{"text":4461,"href":4462,"citation":10},{"text":4287},{"text":4465,"href":4466,"citation":10},{"text":4548}," A purchase specification that depends on a low CO reading at another temperature needs performance evidence for that condition.",{"kind":4203,"content":4550},[4551,4553],{"text":4552},"The calculator below answers a narrower question: which listed ranges satisfy a chosen concentration and error requirement if the stated %FS figure applies? With a rating of ±q%FS, the range must satisfy Cmax ≤ FS ≤ 100 × E ÷ q. Here Cmax is the highest required concentration and E is the permitted absolute error in ppm. ",{"text":4444,"href":4336,"citation":10},{"kind":4555,"title":4556,"percentFS":2467,"gases":4557,"note":4570},"range_screen","Compare range, resolution and error",[4558,4564],{"key":4559,"label":2460,"spans":4560,"ranges":4561,"resolutions":4562,"exampleMaximum":4563,"exampleError":2484},"co",[1973,894],[4389,4399],[4392,4402],80,{"key":4565,"label":2361,"spans":4566,"ranges":4567,"resolutions":4568,"exampleMaximum":2509,"exampleError":4569},"h2s",[697,1973],[4410,4389],[4392,4392],0.5,"This screen applies the selected %FS rating to the listed ranges. A different documented accuracy specification needs a separate assessment.",{"kind":4203,"content":4572},[4573,4575,4576],{"text":4574},"For example, covering 200 ppm while limiting absolute error to ±5 ppm gives no solution at ±3%FS. ",{"text":4444,"href":4336,"citation":10},{"text":4577}," That result rules out the stated %FS specification for the task; it does not rule out a different documented accuracy specification. Any alternative still needs evidence for the concentration and conditions required by the job.",{"id":4579,"heading":4580,"paragraphs":4581,"blocks":4587},"solvent-vapor-exposure","Can a low %LEL reading rule out harmful solvent exposure?",[4582,4583,4584,4585,4586],"A low %LEL reading cannot establish that solvent exposure is acceptable, because flammability and toxic exposure occur at different concentrations. For n-hexane, NIOSH lists an LEL of 1.1% by volume and a recommended exposure limit (REL) of 50 ppm as a TWA. [S8] Using that LEL, even 1%LEL corresponds to 110 ppm. [S8; calculation] A small reading on the flammability scale can therefore exceed the exposure reference.","At 10%LEL, the calculated n-hexane concentration reaches 1,100 ppm, the NIOSH immediately dangerous to life or health (IDLH) value. [S8; calculation] OSHA 29 CFR 1910.146 also defines a flammable atmosphere above 10% of the lower flammable limit as hazardous in covered permit spaces. [S9] Staying below that flammability boundary does not demonstrate control of toxic exposure.","There is a second distinction: converting a gas property is not the same as predicting an instrument reading. Our %LEL type evaluations used methane; the BTYQ-MS400-S test configuration used a catalytic sensor with an MPE of ±5%FS. [S10] [S11] A sensor calibrated with methane needs its own response data for other combustible gases. [S1] The selector below changes the LEL reference in the calculation, without modelling that sensor response.","The conversion uses the published LEL references for methane, propane and n-hexane. [S12] [S13] [S8] For an n-hexane application, the flammability requirement and the exposure requirement should therefore remain separate in the enquiry.","Our documents list VOC ranges from 0–20 ppm to 0–10,000 ppm, and both models have a built-in gas library. [S3] [S4] Those features alone do not establish n-hexane performance: selection still needs the offered sensor’s response data and the required ppm range. On BTYQ-MS104K-M, a PID measurement and %LEL also compete for the same documented sensor position. [S3] That combination limit affects the model choice when both measurements are needed.",[4588,4601,4650,4662,4678,4690,4705,4744],{"kind":4203,"content":4589},[4590,4592,4595,4597,4599],{"text":4591},"A low %LEL reading cannot establish that solvent exposure is acceptable, because flammability and toxic exposure occur at different concentrations. For n-hexane, NIOSH lists an LEL of 1.1% by volume and a recommended exposure limit (REL) of 50 ppm as a TWA. ",{"text":4593,"href":4594,"citation":10},"[S8]","#ref-s8",{"text":4596}," Using that LEL, even 1%LEL corresponds to 110 ppm. ",{"text":4598,"href":4594,"citation":10},"[S8; calculation]",{"text":4600}," A small reading on the flammability scale can therefore exceed the exposure reference.",{"kind":4213,"caption":4602,"headers":4603,"rows":4613,"source":4646},"n-Hexane at 10%LEL compared with US references",[4604,4607,4610],[4605],{"text":4606},"Value",[4608],{"text":4609},"Concentration",[4611],{"text":4612},"What the value describes",[4614,4625,4635],{"cells":4615},[4616,4619,4622],[4617],{"text":4618},"10%LEL of n-hexane",[4620],{"text":4621},"1,100 ppm",[4623],{"text":4624},"Flammability, by gas-property conversion; not a detector reading",{"cells":4626},[4627,4630,4632],[4628],{"text":4629},"NIOSH IDLH",[4631],{"text":4621},[4633],{"text":4634},"Immediately dangerous to life or health",{"cells":4636},[4637,4640,4643],[4638],{"text":4639},"NIOSH REL",[4641],{"text":4642},"50 ppm TWA",[4644],{"text":4645},"Recommended exposure limit over a workday",[4647,4648,4649],{"text":4284},{"text":4593,"citation":10,"href":4594},{"text":4532},{"kind":4203,"content":4651},[4652,4654,4655,4657,4660],{"text":4653},"At 10%LEL, the calculated n-hexane concentration reaches 1,100 ppm, the NIOSH immediately dangerous to life or health (IDLH) value. ",{"text":4598,"href":4594,"citation":10},{"text":4656}," OSHA 29 CFR 1910.146 also defines a flammable atmosphere above 10% of the lower flammable limit as hazardous in covered permit spaces. ",{"text":4658,"href":4659,"citation":10},"[S9]","#ref-s9",{"text":4661}," Staying below that flammability boundary does not demonstrate control of toxic exposure.",{"kind":4203,"content":4663},[4664,4666,4669,4670,4673,4675,4676],{"text":4665},"There is a second distinction: converting a gas property is not the same as predicting an instrument reading. Our %LEL type evaluations used methane; the BTYQ-MS400-S test configuration used a catalytic sensor with an MPE of ±5%FS. ",{"text":4667,"href":4668,"citation":10},"[S10]","#ref-s10",{"text":4287},{"text":4671,"href":4672,"citation":10},"[S11]","#ref-s11",{"text":4674}," A sensor calibrated with methane needs its own response data for other combustible gases. ",{"text":4208,"href":4209,"citation":10},{"text":4677}," The selector below changes the LEL reference in the calculation, without modelling that sensor response.",{"kind":4679,"title":4680,"gases":4681,"note":4689},"lel_conversion","Same %LEL, different volume concentration",[4682,4683,4685],{"key":2473,"name":2474,"lelPercentVolume":2484},{"key":3069,"name":3070,"lelPercentVolume":4684},2.1,{"key":4686,"name":4687,"lelPercentVolume":4688},"nhexane","n-Hexane",1.1,"Gas-property conversion only. It does not predict the response of a sensor calibrated on another gas, provide a correction factor or set an alarm.",{"kind":4203,"content":4691},[4692,4694,4697,4698,4701,4702,4703],{"text":4693},"The conversion uses the published LEL references for methane, propane and n-hexane. ",{"text":4695,"href":4696,"citation":10},"[S12]","#ref-s12",{"text":4287},{"text":4699,"href":4700,"citation":10},"[S13]","#ref-s13",{"text":4287},{"text":4593,"href":4594,"citation":10},{"text":4704}," For an n-hexane application, the flammability requirement and the exposure requirement should therefore remain separate in the enquiry.",{"kind":4213,"caption":4706,"headers":4707,"rows":4717,"source":4740},"Two separate requirements for an n-hexane job",[4708,4711,4714],[4709],{"text":4710},"Requirement",[4712],{"text":4713},"Include in the enquiry",[4715],{"text":4716},"Evidence needed for the offered instrument",[4718,4729],{"cells":4719},[4720,4723,4726],[4721],{"text":4722},"Flammability",[4724],{"text":4725},"n-Hexane, %LEL scale and calibration gas.",[4727],{"text":4728},"Sensor-specific response to n-hexane; a gas-property conversion is not enough.",{"cells":4730},[4731,4734,4737],[4732],{"text":4733},"Exposure",[4735],{"text":4736},"n-Hexane in ppm, the applicable limit and its averaging period.",[4738],{"text":4739},"A ppm-level measurement method with matching performance data; a general “VOC” label is not enough.",[4741,4742,4743],{"text":4284},{"text":4208,"citation":10,"href":4209},{"text":4241},{"kind":4203,"content":4745},[4746,4748,4749,4750,4751,4753,4754],{"text":4747},"Our documents list VOC ranges from 0–20 ppm to 0–10,000 ppm, and both models have a built-in gas library. ",{"text":4335,"href":4336,"citation":10},{"text":4287},{"text":4356,"href":4357,"citation":10},{"text":4752}," Those features alone do not establish n-hexane performance: selection still needs the offered sensor’s response data and the required ppm range. On BTYQ-MS104K-M, a PID measurement and %LEL also compete for the same documented sensor position. ",{"text":4335,"href":4336,"citation":10},{"text":4755}," That combination limit affects the model choice when both measurements are needed.",{"id":4757,"heading":4758,"paragraphs":4759,"blocks":4764},"carbon-dioxide-blind-spot","Why does a normal oxygen reading not rule out CO₂?",[4760,4761,4762,4763],"An O₂ sensor measures oxygen, so its reading cannot tell you how much CO₂ is present. If oxygen-free CO₂ mixes uniformly with air initially containing 20.9% vol O₂, the oxygen fraction falls as the air is displaced. The calculation is O₂ = 20.9 × (1 − CO₂ fraction). [Calculation] At 3% vol CO₂, the resulting O₂ reading is still 20.27% vol.","At the NIOSH CO₂ IDLH of 40,000 ppm, the same calculation gives 20.06% vol O₂. [S14; calculation] That is above the 19.5% vol oxygen-deficiency boundary in OSHA 29 CFR 1910.146 for covered permit spaces. [S9] This example explains the blind spot; uniform mixing and oxygen-free CO₂ are calculation assumptions, not a prediction of a particular release.","Where CO₂ is a hazard, a separate CO₂ measurement is needed. Range selection then follows the same coverage-and-error question as CO: which concentrations must the instrument read, and how accurate must those readings be? Our documents list the following CO₂ options. [S3] [S4]","The 0–5,000 ppm option reaches the NIOSH TWA reference only at full scale, while the short-term and IDLH references lie above it. [S4] [S14] A range that reaches 40,000 ppm covers those higher reference concentrations, but range coverage alone does not establish accuracy. The next section explains why adding CO₂ to O₂\u002FCO\u002FH₂S\u002F%LEL also depends on the model’s sensor arrangement.",[4765,4773,4838,4849,4856,4904],{"kind":4203,"content":4766},[4767,4769,4771],{"text":4768},"An O₂ sensor measures oxygen, so its reading cannot tell you how much CO₂ is present. If oxygen-free CO₂ mixes uniformly with air initially containing 20.9% vol O₂, the oxygen fraction falls as the air is displaced. The calculation is O₂ = 20.9 × (1 − CO₂ fraction). ",{"text":4770,"citation":10},"[Calculation]",{"text":4772}," At 3% vol CO₂, the resulting O₂ reading is still 20.27% vol.",{"kind":4213,"caption":4774,"headers":4775,"rows":4785,"source":4830},"Ideal displacement: CO₂ concentration and calculated oxygen reading",[4776,4779,4782],[4777],{"text":4778},"CO₂ in the mixture",[4780],{"text":4781},"Calculated O₂ reading",[4783],{"text":4784},"US reference at that CO₂ level",[4786,4797,4808,4819],{"cells":4787},[4788,4791,4794],[4789],{"text":4790},"0.5% vol (5,000 ppm)",[4792],{"text":4793},"20.80% vol",[4795],{"text":4796},"NIOSH REL and OSHA PEL: TWA 5,000 ppm",{"cells":4798},[4799,4802,4805],[4800],{"text":4801},"3.0% vol (30,000 ppm)",[4803],{"text":4804},"20.27% vol",[4806],{"text":4807},"NIOSH short-term REL: 30,000 ppm",{"cells":4809},[4810,4813,4816],[4811],{"text":4812},"4.0% vol (40,000 ppm)",[4814],{"text":4815},"20.06% vol",[4817],{"text":4818},"NIOSH IDLH: 40,000 ppm",{"cells":4820},[4821,4824,4827],[4822],{"text":4823},"6.7% vol (67,000 ppm)",[4825],{"text":4826},"19.50% vol",[4828],{"text":4829},"Above the IDLH; O₂ reaches the 19.5% vol boundary in OSHA 29 CFR 1910.146",[4831,4832,4833,4834,4837],{"text":4284},{"text":4658,"citation":10,"href":4659},{"text":4287},{"text":4835,"citation":10,"href":4836},"[S14]","#ref-s14",{"text":4241},{"kind":4203,"content":4839},[4840,4842,4844,4846,4847],{"text":4841},"At the NIOSH CO₂ IDLH of 40,000 ppm, the same calculation gives 20.06% vol O₂. ",{"text":4843,"href":4836,"citation":10},"[S14; calculation]",{"text":4845}," That is above the 19.5% vol oxygen-deficiency boundary in OSHA 29 CFR 1910.146 for covered permit spaces. ",{"text":4658,"href":4659,"citation":10},{"text":4848}," This example explains the blind spot; uniform mixing and oxygen-free CO₂ are calculation assumptions, not a prediction of a particular release.",{"kind":4203,"content":4850},[4851,4853,4854,4855],{"text":4852},"Where CO₂ is a hazard, a separate CO₂ measurement is needed. Range selection then follows the same coverage-and-error question as CO: which concentrations must the instrument read, and how accurate must those readings be? Our documents list the following CO₂ options. ",{"text":4335,"href":4336,"citation":10},{"text":4287},{"text":4356,"href":4357,"citation":10},{"kind":4213,"caption":4857,"headers":4858,"rows":4865,"source":4898},"Documented CO₂ ranges and the US references they reach",[4859,4862],[4860],{"text":4861},"CO₂ range",[4863],{"text":4864},"Highest US reference within the range",[4866,4874,4882,4890],{"cells":4867},[4868,4871],[4869],{"text":4870},"0–5,000 ppm",[4872],{"text":4873},"TWA 5,000 ppm, at full scale; the short-term REL and IDLH are above the range",{"cells":4875},[4876,4879],[4877],{"text":4878},"0–50,000 ppm",[4880],{"text":4881},"Short-term REL 30,000 ppm and IDLH 40,000 ppm",{"cells":4883},[4884,4887],[4885],{"text":4886},"0–5% vol",[4888],{"text":4889},"IDLH 40,000 ppm (4% vol)",{"cells":4891},[4892,4895],[4893],{"text":4894},"0–100% vol",[4896],{"text":4897},"All three references; check the error that applies near your decision value",[4899,4900,4901,4902,4903],{"text":4284},{"text":4356,"citation":10,"href":4357},{"text":4287},{"text":4835,"citation":10,"href":4836},{"text":4241},{"kind":4203,"content":4905},[4906,4908,4909,4910,4911],{"text":4907},"The 0–5,000 ppm option reaches the NIOSH TWA reference only at full scale, while the short-term and IDLH references lie above it. ",{"text":4356,"href":4357,"citation":10},{"text":4287},{"text":4835,"href":4836,"citation":10},{"text":4912}," A range that reaches 40,000 ppm covers those higher reference concentrations, but range coverage alone does not establish accuracy. The next section explains why adding CO₂ to O₂\u002FCO\u002FH₂S\u002F%LEL also depends on the model’s sensor arrangement.",{"id":4914,"heading":4915,"paragraphs":4916,"blocks":4926},"detector-and-sampling-selection","Which model and sampling arrangement fit the job?",[4917,4918,4919,4920,4921,4922,4923,4924,4925],"For monitoring where gas can reach the instrument, both models support diffusion sampling. For a remote sample, BTYQ-MS104K-M uses an attached external pump, while BTYQ-MS400-S has a built-in pump that can be switched off for diffusion. [S3] Choose between those arrangements after deciding where the sample must come from and which gases must be measured together.","The standard accessories include an external pump and a filter. [S3] The MB20A pump identified in the type-evaluation report is rated at 500 mL\u002Fmin. [S11] The photographs show the instrument by itself and with the pump attached.","The built-in pump is rated at 0.5–1 L\u002Fmin with at least 10 flow levels. Standard accessories include a 0.2 m gooseneck sampling probe and a filter. [S3] Both models also offer a 0.6 m stainless-steel handle or a 0.9 m telescopic handle, each with 1 m of hose. [S3]","Our specification table describes both models as configurable for one to four gases, with expansion to five or six. [S3] It also gives different sensor-combination rules. A supported gas range is therefore not enough to establish that all required gases can be measured together.","For O₂\u002FCO\u002FH₂S\u002F%LEL plus CO₂, BTYQ-MS104K-M is outside the documented combinations because CO₂ and %LEL use the same sensor position. [S3] BTYQ-MS400-S is the model to evaluate for that five-gas requirement; the exact combination and CO₂ range still need confirmation in the quotation. The same reasoning applies when solvent exposure requires a PID measurement alongside %LEL.","The more-than-100-hour figure for BTYQ-MS104K-M applies to diffusion operation without catalytic, infrared or PID sensors. [S3] It therefore cannot establish runtime for an O₂\u002FCO\u002FH₂S\u002F%LEL configuration. BTYQ-MS400-S is documented at more than 20 hours in pumped operation. [S3] Because the two figures describe different loads, the quotation needs runtime for the proposed gas configuration and sampling mode.","A pump’s flow rating does not establish how quickly the complete kit will detect a target gas. The type-evaluation reports contain measured response times for the tested configurations and modes, as shown below. [S6] [S7] [S10] T90 means the time to reach 90% of the final reading.","These results were measured at 20–24 °C and do not include an added remote-sampling hose. [S6] [S7] [S10] For remote sampling, the waiting time must account for the target gas, handle, hose and filters together. A complete-path response result addresses that question; the laboratory response figure alone does not.","The personal gas monitoring guide compares worn and remote monitoring, kit weight and runtime, and pre-use checks. For remote testing through a pump, probe and hose, the confined-space guide covers sampling points, line purging and response. For fixed online sampling of humid air, where condensate and filters can remove H₂S or ammonia, see the wastewater gas sampling guide. Those checks follow from the sampling path selected here.",[4927,4934,4939,4949,4956,4964,4968,4976,4981,4987,4991,4998,5037,5044,5048,5058,5062,5073,5126,5137],{"kind":4203,"content":4928},[4929,4931,4932],{"text":4930},"For monitoring where gas can reach the instrument, both models support diffusion sampling. For a remote sample, BTYQ-MS104K-M uses an attached external pump, while BTYQ-MS400-S has a built-in pump that can be switched off for diffusion. ",{"text":4335,"href":4336,"citation":10},{"text":4933}," Choose between those arrangements after deciding where the sample must come from and which gases must be measured together.",{"kind":4935,"level":2467,"content":4936},"heading",[4937],{"text":4938},"BTYQ-MS104K-M: diffusion with an external pump",{"kind":4203,"content":4940},[4941,4943,4944,4946,4947],{"text":4942},"The standard accessories include an external pump and a filter. ",{"text":4335,"href":4336,"citation":10},{"text":4945}," The MB20A pump identified in the type-evaluation report is rated at 500 mL\u002Fmin. ",{"text":4671,"href":4672,"citation":10},{"text":4948}," The photographs show the instrument by itself and with the pump attached.",{"kind":4950,"items":4951},"images",[4952],{"url":4953,"alt":4954,"caption":4955,"width":1212,"height":1212},"\u002Fimages\u002Fresources\u002Fw04\u002Fimage-2-1f31d2c6c05a.webp","BTYQ-MS104K-M portable gas detector, front view","Instrument",{"kind":4950,"items":4957},[4958],{"url":4959,"alt":4960,"caption":4961,"width":4962,"height":4963},"\u002Fimages\u002Fresources\u002Fw04\u002Fimage-3-c67758e1202e.webp","BTYQ-MS104K-M with its external pump attached and a filter above the inlet","External pump attached",272,418,{"kind":4935,"level":2467,"content":4965},[4966],{"text":4967},"BTYQ-MS400-S: built-in pump with diffusion mode",{"kind":4203,"content":4969},[4970,4972,4973,4975],{"text":4971},"The built-in pump is rated at 0.5–1 L\u002Fmin with at least 10 flow levels. Standard accessories include a 0.2 m gooseneck sampling probe and a filter. ",{"text":4335,"href":4336,"citation":10},{"text":4974}," Both models also offer a 0.6 m stainless-steel handle or a 0.9 m telescopic handle, each with 1 m of hose. ",{"text":4335,"href":4336,"citation":10},{"kind":4950,"items":4977},[4978],{"url":4979,"alt":4980,"caption":4955,"width":1212,"height":1212},"\u002Fimages\u002Fresources\u002Fw04\u002Fimage-4-545ca174308f.webp","BTYQ-MS400-S portable gas detector, front view",{"kind":4950,"items":4982},[4983],{"url":4984,"alt":4985,"caption":4986,"width":704,"height":704},"\u002Fimages\u002Fresources\u002Fw04\u002Fimage-5-3c0125f77907.webp","BTYQ-MS400-S with a gooseneck sampling probe and inlet filter attached","Sampling probe attached",{"kind":4935,"level":2467,"content":4988},[4989],{"text":4990},"Gas combinations can decide the model before sampling does",{"kind":4203,"content":4992},[4993,4995,4996],{"text":4994},"Our specification table describes both models as configurable for one to four gases, with expansion to five or six. ",{"text":4335,"href":4336,"citation":10},{"text":4997}," It also gives different sensor-combination rules. A supported gas range is therefore not enough to establish that all required gases can be measured together.",{"kind":4213,"caption":4999,"headers":5000,"rows":5010,"source":5033},"Documented sensor combination rules",[5001,5004,5007],[5002],{"text":5003},"Model",[5005],{"text":5006},"Documented combinations",[5008],{"text":5009},"What this means for O₂ + CO + H₂S + %LEL",[5011,5022],{"cells":5012},[5013,5016,5019],[5014],{"text":5015},"BTYQ-MS104K-M",[5017],{"text":5018},"One EX, CO₂, PID or infrared sensor plus three electrochemical sensors; or four electrochemical sensors; or CO\u002FH₂S plus three other gases.",[5020],{"text":5021},"The %LEL sensor uses the single EX, CO₂, PID or infrared position. Adding CO₂ or a PID measurement is outside the documented combinations.",{"cells":5023},[5024,5027,5030],[5025],{"text":5026},"BTYQ-MS400-S",[5028],{"text":5029},"Plug-in digital sensors, automatically identified, in any combination.",[5031],{"text":5032},"A fifth measurement such as CO₂ is an expanded configuration; we confirm it in the quotation.",[5034,5035,5036],{"text":4284},{"text":4335,"citation":10,"href":4336},{"text":4241},{"kind":4203,"content":5038},[5039,5041,5042],{"text":5040},"For O₂\u002FCO\u002FH₂S\u002F%LEL plus CO₂, BTYQ-MS104K-M is outside the documented combinations because CO₂ and %LEL use the same sensor position. ",{"text":4335,"href":4336,"citation":10},{"text":5043}," BTYQ-MS400-S is the model to evaluate for that five-gas requirement; the exact combination and CO₂ range still need confirmation in the quotation. The same reasoning applies when solvent exposure requires a PID measurement alongside %LEL.",{"kind":4935,"level":2467,"content":5045},[5046],{"text":5047},"Compare runtime for the configuration you will use",{"kind":4203,"content":5049},[5050,5052,5053,5055,5056],{"text":5051},"The more-than-100-hour figure for BTYQ-MS104K-M applies to diffusion operation without catalytic, infrared or PID sensors. ",{"text":4335,"href":4336,"citation":10},{"text":5054}," It therefore cannot establish runtime for an O₂\u002FCO\u002FH₂S\u002F%LEL configuration. BTYQ-MS400-S is documented at more than 20 hours in pumped operation. ",{"text":4335,"href":4336,"citation":10},{"text":5057}," Because the two figures describe different loads, the quotation needs runtime for the proposed gas configuration and sampling mode.",{"kind":4935,"level":2467,"content":5059},[5060],{"text":5061},"Allow for the complete sampling path",{"kind":4203,"content":5063},[5064,5066,5067,5068,5069,5070,5071],{"text":5065},"A pump’s flow rating does not establish how quickly the complete kit will detect a target gas. The type-evaluation reports contain measured response times for the tested configurations and modes, as shown below. ",{"text":4461,"href":4462,"citation":10},{"text":4287},{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":4667,"href":4668,"citation":10},{"text":5072}," T90 means the time to reach 90% of the final reading.",{"kind":4213,"caption":5074,"headers":5075,"rows":5085,"source":5118},"Response times measured in type evaluation",[5076,5079,5082],[5077],{"text":5078},"Model and gas",[5080],{"text":5081},"Sampling mode in the test",[5083],{"text":5084},"Measured response time",[5086,5097,5108],{"cells":5087},[5088,5091,5094],[5089],{"text":5090},"BTYQ-MS104K-M, CO 0–1000 μmol\u002Fmol",[5092],{"text":5093},"Diffusion",[5095],{"text":5096},"13–14 s average, three units",{"cells":5098},[5099,5102,5105],[5100],{"text":5101},"BTYQ-MS400-S, CO 0–1000 μmol\u002Fmol",[5103],{"text":5104},"Pumped",[5106],{"text":5107},"10–11 s average, three units",{"cells":5109},[5110,5113,5115],[5111],{"text":5112},"BTYQ-MS400-S, methane 0–100%LEL",[5114],{"text":5104},[5116],{"text":5117},"8–10 s average, three units",[5119,5120,5121,5122,5123,5124,5125],{"text":4284},{"text":4461,"citation":10,"href":4462},{"text":4287},{"text":4465,"citation":10,"href":4466},{"text":4287},{"text":4667,"citation":10,"href":4668},{"text":4241},{"kind":4203,"content":5127},[5128,5130,5131,5132,5133,5134,5135],{"text":5129},"These results were measured at 20–24 °C and do not include an added remote-sampling hose. ",{"text":4461,"href":4462,"citation":10},{"text":4287},{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":4667,"href":4668,"citation":10},{"text":5136}," For remote sampling, the waiting time must account for the target gas, handle, hose and filters together. A complete-path response result addresses that question; the laboratory response figure alone does not.",{"kind":4203,"content":5138},[5139,5141,5143,5145,5147,5149,5151],{"text":5140},"The ",{"text":5142,"href":48},"personal gas monitoring guide",{"text":5144}," compares worn and remote monitoring, kit weight and runtime, and pre-use checks. For remote testing through a pump, probe and hose, the ",{"text":5146,"href":40},"confined-space guide",{"text":5148}," covers sampling points, line purging and response. For fixed online sampling of humid air, where condensate and filters can remove H₂S or ammonia, see the ",{"text":5150,"href":292},"wastewater gas sampling guide",{"text":5152},". Those checks follow from the sampling path selected here.",{"id":5154,"heading":5155,"paragraphs":5156,"blocks":5159},"explosion-protection-records","Which explosion-protection record applies to the offered detector?",[5157,5158],"The approval question concerns the model and version being supplied, not the brand as a whole. The Chinese GB\u002FT records below identify BTYQ-MS104K-M and BTYQ-MS400-S separately. Both carry Ex ia IIC T4 Ga, with an X suffix indicating special conditions. [S15] [S16] Those conditions need to be included in the project’s certificate review.","Neither of these records is an ATEX, IECEx or US approval. [S15] [S16] We hold other explosion-protection records with different markings, each limited to its own scope. The RFQ should name the required approval scheme so the offered model and configuration can be matched to the relevant record. A company management-system certificate cannot replace that product-level evidence.",[5160,5173,5213],{"kind":4203,"content":5161},[5162,5164,5167,5168,5171],{"text":5163},"The approval question concerns the model and version being supplied, not the brand as a whole. The Chinese GB\u002FT records below identify BTYQ-MS104K-M and BTYQ-MS400-S separately. Both carry Ex ia IIC T4 Ga, with an X suffix indicating special conditions. ",{"text":5165,"href":5166,"citation":10},"[S15]","#ref-s15",{"text":4287},{"text":5169,"href":5170,"citation":10},"[S16]","#ref-s16",{"text":5172}," Those conditions need to be included in the project’s certificate review.",{"kind":4213,"caption":5174,"headers":5175,"rows":5184,"source":5207},"Model-specific certificate check — Chinese GB\u002FT records",[5176,5178,5181],[5177],{"text":5003},[5179],{"text":5180},"Certificate and gas-atmosphere marking",[5182],{"text":5183},"Scope to keep",[5185,5197],{"cells":5186},[5187,5189,5194],[5188],{"text":5015},[5190,5192],{"text":3727,"href":5191},"\u002Fdocuments\u002Fcertificates\u002Fcertificate-ccri-24-2941x.pdf",{"text":5193},": Ex ia IIC T4 Ga.",[5195],{"text":5196},"The identified version only; carry the X special conditions into your document review.",{"cells":5198},[5199,5201,5205],[5200],{"text":5026},[5202,5204],{"text":3580,"href":5203},"\u002Fdocuments\u002Fcertificates\u002Fcertificate-ccri-25-2157x.pdf",{"text":5193},[5206],{"text":5196},[5208,5209,5210,5211,5212],{"text":4284},{"text":5165,"citation":10,"href":5166},{"text":4287},{"text":5169,"citation":10,"href":5170},{"text":4241},{"kind":4203,"content":5214},[5215,5217,5218,5219,5220],{"text":5216},"Neither of these records is an ATEX, IECEx or US approval. ",{"text":5165,"href":5166,"citation":10},{"text":4287},{"text":5169,"href":5170,"citation":10},{"text":5221}," We hold other explosion-protection records with different markings, each limited to its own scope. The RFQ should name the required approval scheme so the offered model and configuration can be matched to the relevant record. A company management-system certificate cannot replace that product-level evidence.",{"id":5223,"heading":5224,"paragraphs":5225,"blocks":5228},"configuration-enquiry","What should I send with a configuration enquiry?",[5226,5227],"A useful enquiry identifies which gases must be measured together, each range and the permitted error. It also describes the sampling path. Add the required operating period and approval scheme so we can propose a configuration and identify the supporting records. Unknown requirements can remain open.","Copy the worksheet into the configuration RFQ, or use the gas detector quotation checklist for the remaining order details. The BTYQ-MS104K-M product page and BTYQ-MS400-S product page provide the model specifications to review alongside the proposed combination.",[5229,5232,5246],{"kind":4203,"content":5230},[5231],{"text":5226},{"kind":5233,"title":5234,"fields":5235,"contextFields":5241,"rowCount":2475,"note":5245},"enquiry","Prepare a configuration enquiry",[5236,5237,5238,5239,5240],"Required gas","Range and unit","Permitted error \u002F time basis","Must be measured with","Evidence still needed",[5242,5243,5244],"Sampling task, tubing and filters","Operating conditions and required duration","Approval scheme and configuration scope","Preparing text keeps the entries on this page. Copy the result into your RFQ when ready; no enquiry is submitted here.",{"kind":4203,"content":5247},[5248,5250,5252,5254,5256,5258,5260,5262,5264],{"text":5249},"Copy the worksheet into the ",{"text":5251,"href":300},"configuration RFQ",{"text":5253},", or use the ",{"text":5255,"href":266},"gas detector quotation checklist",{"text":5257}," for the remaining order details. The ",{"text":5259,"href":200},"BTYQ-MS104K-M product page",{"text":5261}," and ",{"text":5263,"href":212},"BTYQ-MS400-S product page",{"text":5265}," provide the model specifications to review alongside the proposed combination.",{"id":5267,"heading":5268,"paragraphs":5269,"blocks":5271},"references","References",[5270],"Bracketed numbers in the text link to these sources. The four type-evaluation reports are available below as Chinese-language PDFs. Other Eranntex records are available on request; public reference sources link to the issuing body.",[5272,5275],{"kind":4203,"content":5273},[5274],{"text":5270},{"kind":4213,"caption":5276,"headers":5277,"rows":5287},"Sources cited in this guide",[5278,5281,5284],[5279],{"text":5280},"Ref.",[5282],{"text":5283},"Source",[5285],{"text":5286},"What it supports",[5288,5301,5314,5333,5345,5358,5371,5384,5397,5410,5423,5436,5449,5462,5475,5487],{"id":5289,"cells":5290},"ref-s1",[5291,5294,5298],[5292],{"text":5293},"S1",[5295],{"text":5296,"href":5297},"OSHA Technical Manual, Section II, Chapter 3","https:\u002F\u002Fwww.osha.gov\u002Fotm\u002Fsection-2-health-hazards\u002Fchapter-3",[5299],{"text":5300},"US guidance on direct-reading instruments; %LEL of the calibration gas.",{"id":5302,"cells":5303},"ref-s2",[5304,5307,5311],[5305],{"text":5306},"S2",[5308],{"text":5309,"href":5310},"NIOSH Pocket Guide: Introduction","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fnpg\u002Fpgintrod.html",[5312],{"text":5313},"Definitions of TWA, STEL and ceiling.",{"id":5315,"cells":5316},"ref-s3",[5317,5320,5330],[5318],{"text":5319},"S3",[5321,5323,5325,5326,5328],{"text":5322},"Eranntex product specification table, 2026-06-15 edition. Published values also appear on the ",{"text":5015,"href":5324},"https:\u002F\u002Fwww.eranntex.com\u002Fproducts\u002Fms104k-m\u002F",{"text":5261},{"text":5026,"href":5327},"https:\u002F\u002Fwww.eranntex.com\u002Fproducts\u002Fms400-s\u002F",{"text":5329}," product pages.",[5331],{"text":5332},"Configurations, typical accuracy, sampling, accessories and runtime, with their recorded conditions.",{"id":5334,"cells":5335},"ref-s4",[5336,5339,5342],[5337],{"text":5338},"S4",[5340],{"text":5341},"Eranntex model documents: gas-range appendices (Eranntex record).",[5343],{"text":5344},"Single gas-and-range options; not confirmed gas combinations.",{"id":5346,"cells":5347},"ref-s5",[5348,5351,5355],[5349],{"text":5350},"S5",[5352],{"text":5353,"href":5354},"NIOSH Pocket Guide: Carbon monoxide","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fnpg\u002Fnpgd0105.html",[5356],{"text":5357},"REL, ceiling and OSHA PEL with their averaging periods.",{"id":5359,"cells":5360},"ref-s6",[5361,5364,5368],[5362],{"text":5363},"S6",[5365],{"text":5366,"href":5367},"Type-evaluation report HYQ202538502, Guangdong Institute of Metrology, 2025-02-20 (PDF, Chinese).","\u002Fdocuments\u002Ftest-reports\u002Fms104k-m-co-type-evaluation-hyq202538502.pdf",[5369],{"text":5370},"BTYQ-MS104K-M, CO 0–1000 μmol\u002Fmol: three units, 20–24 °C, diffusion; laboratory result.",{"id":5372,"cells":5373},"ref-s7",[5374,5377,5381],[5375],{"text":5376},"S7",[5378],{"text":5379,"href":5380},"Type-evaluation report HYQ202538544, Guangdong Institute of Metrology, 2026-01-22 (PDF, Chinese).","\u002Fdocuments\u002Ftest-reports\u002Fms400-s-co-type-evaluation-hyq202538544.pdf",[5382],{"text":5383},"BTYQ-MS400-S, CO 0–1000 μmol\u002Fmol: three units, 21–23 °C, pumped; laboratory result.",{"id":5385,"cells":5386},"ref-s8",[5387,5390,5394],[5388],{"text":5389},"S8",[5391],{"text":5392,"href":5393},"NIOSH Pocket Guide: n-Hexane","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fnpg\u002Fnpgd0322.html",[5395],{"text":5396},"REL, IDLH and LEL; not a sensor response factor.",{"id":5398,"cells":5399},"ref-s9",[5400,5403,5407],[5401],{"text":5402},"S9",[5404],{"text":5405,"href":5406},"OSHA 29 CFR 1910.146","https:\u002F\u002Fwww.osha.gov\u002Flaws-regs\u002Fregulations\u002Fstandardnumber\u002F1910\u002F1910.146",[5408],{"text":5409},"Hazardous-atmosphere definitions for covered US permit spaces.",{"id":5411,"cells":5412},"ref-s10",[5413,5416,5420],[5414],{"text":5415},"S10",[5417],{"text":5418,"href":5419},"Type-evaluation report HYQ202538576, Guangdong Institute of Metrology, 2026-01-26 (PDF, Chinese).","\u002Fdocuments\u002Ftest-reports\u002Fms400-s-methane-type-evaluation-hyq202538576.pdf",[5421],{"text":5422},"BTYQ-MS400-S, methane 0–100%LEL: catalytic sensor, three units, 20–22 °C.",{"id":5424,"cells":5425},"ref-s11",[5426,5429,5433],[5427],{"text":5428},"S11",[5430],{"text":5431,"href":5432},"Type-evaluation report F24-164-JJ (PDF, Chinese).","\u002Fdocuments\u002Ftest-reports\u002Fms104k-m-methane-type-evaluation-f24-164-jj.pdf",[5434],{"text":5435},"BTYQ-MS104K-M, methane 0–100%LEL; lists the MB20A external pump rated 500 mL\u002Fmin.",{"id":5437,"cells":5438},"ref-s12",[5439,5442,5446],[5440],{"text":5441},"S12",[5443],{"text":5444,"href":5445},"NIOSH: Methane monitoring during roof bolting","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fengcontrols\u002Fecd\u002Fdetail153.html",[5447],{"text":5448},"Methane LEL of 5% by volume, used for conversion only.",{"id":5450,"cells":5451},"ref-s13",[5452,5455,5459],[5453],{"text":5454},"S13",[5456],{"text":5457,"href":5458},"NIOSH Pocket Guide: Propane","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fnpg\u002Fnpgd0524.html",[5460],{"text":5461},"Propane LEL of 2.1% by volume, used for conversion only.",{"id":5463,"cells":5464},"ref-s14",[5465,5468,5472],[5466],{"text":5467},"S14",[5469],{"text":5470,"href":5471},"NIOSH Pocket Guide: Carbon dioxide","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fnpg\u002Fnpgd0103.html",[5473],{"text":5474},"REL, short-term REL, OSHA PEL and IDLH.",{"id":5476,"cells":5477},"ref-s15",[5478,5481,5484],[5479],{"text":5480},"S15",[5482],{"text":5483,"href":5191},"Certificate CCRI 24.2941X (PDF)",[5485],{"text":5486},"Chinese GB\u002FT explosion-protection certificate for BTYQ-MS104K-M; identified version and X conditions only.",{"id":5488,"cells":5489},"ref-s16",[5490,5493,5496],[5491],{"text":5492},"S16",[5494],{"text":5495,"href":5203},"Certificate CCRI 25.2157X (PDF)",[5497],{"text":5498},"Chinese GB\u002FT explosion-protection certificate for BTYQ-MS400-S; identified version and X conditions only.",[5500,5504,5508],{"id":5501,"question":5502,"answer":5503},"w04-faq-1","Can a 4-gas monitor detect CO₂?","A configuration for O₂, CO, H₂S and %LEL does not measure CO₂. An oxygen reading cannot substitute for a separate CO₂ measurement: in the uniform-displacement example above, CO₂ at 40,000 ppm still leaves about 20.06% vol O₂. If CO₂ is part of the hazard assessment, include its range in the enquiry and confirm that the proposed instrument can measure it alongside the other required gases.",{"id":5505,"question":5506,"answer":5507},"w04-faq-2","Should I choose the widest available CO range?","Choose a range that covers the required concentration, then compare the applicable accuracy specifications. At the same ±3%FS rating, a wider range gives a larger absolute tolerance. However, the 0–1000 μmol\u002Fmol CO type-evaluation reports state a different MPE and include tests at 150, 300 and 700 μmol\u002Fmol. Those laboratory results do not establish performance near 35 ppm or across the full operating-temperature range.",{"id":5509,"question":5510,"answer":5511},"w04-faq-3","Does a 10%LEL alarm protect workers from solvent exposure?","A %LEL alarm addresses flammability. For n-hexane, the published LEL makes 10%LEL equivalent to 1,100 ppm, far above the NIOSH TWA reference of 50 ppm. That calculation also does not predict how a methane-calibrated sensor will respond to n-hexane. Where solvent exposure is part of the job, selection needs a separate ppm-level measurement method and response data for the target solvent.",{"title":5513,"description":5514},"What Does a 4-Gas Monitor Detect? Gases & Limits","Compare 4-gas readings, CO range accuracy and sampling options. Use worked examples to identify CO₂ and solvent hazards that standard readings can miss.","split",[],{"productIds":5518,"gasIds":5519,"industryIds":5520,"applicationIds":5521,"id":286,"slug":1031,"type":1032,"status":3921,"language":18,"revision":5522,"issueDate":5523,"author":5524,"media":5525,"certificateIds":5533,"marketContent":5534,"sources":5626},[],[],[],[],"company-news-approved-20261019","2026-10-19","Eranntex Team",{"id":5526,"url":5527,"mimeType":705,"width":4183,"height":5528,"alt":5529,"roles":5530,"localizedAlt":5531},"media-procurement-awards-real-product-split","\u002Fimages\u002Fresources\u002Feranntex-procurement-awards-real-product-split.webp",1045,"Eranntex procurement awards news cover: Qingdao and Xinjiang text on the left, with a BTYQ-MS600-S2 product photograph on the right.",[707,708],{"zh-CN":5532},"逸云天政府采购中标新闻配图：左侧为青岛、新疆文字，右侧为 BTYQ-MS600-S2 产品照片。",[],[5535,5587],{"market":17,"locale":18,"publication":5536,"title":5537,"summary":5538,"seo":5539,"body":5542,"mediaCaption":5586},{"status":663,"indexable":10},"Eranntex Congratulates Suppliers on Public Procurement Awards in Qingdao and Xinjiang","Official award notices list Eranntex instruments in procurement projects in Qingdao and Xinjiang. Eranntex congratulates the successful suppliers.",{"title":5540,"description":5541},"Public Procurement Awards in Qingdao and Xinjiang","Eranntex congratulates 鲁科检测科技（海南）有限公司 and 新疆博奇环保工程有限公司 on procurement awards whose published schedules list Eranntex instruments.",[5543,5547,5560,5572,5576],{"id":5544,"paragraphs":5545},"procurement-update",[5546],"Eranntex congratulates 鲁科检测科技（海南）有限公司 and 新疆博奇环保工程有限公司 on their public procurement awards in Qingdao and Xinjiang. The official award notices list Eranntex (逸云天) instruments in the procurement schedules.",{"id":5548,"heading":5549,"paragraphs":5550,"links":5553},"qingdao-award","Equipment procurement in Qingdao",[5551,5552],"An official notice dated October 17, 2026 names 鲁科检测科技（海南）有限公司 as the successful supplier for an equipment procurement lot. The purchaser is 青岛市特种设备检验研究院 (Qingdao Special Equipment Inspection Institute).","The published schedule lists four 逸云天 BTYQ-MS600-S2 instruments for toxic and hazardous gas analysis and one 逸云天 MS104K-L oxygen detector.",[5554],{"id":5555,"label":5556,"target":5557},"qingdao-official-notice","Read the official award notice on 国家公共资源交易平台",{"kind":5558,"sourceId":5559},"reference","news-ref-qingdao-award-20261017",{"id":5561,"heading":5562,"paragraphs":5563,"links":5566},"xinjiang-award","Environmental monitoring procurement in Xinjiang",[5564,5565],"An official notice dated October 10, 2026 names 新疆博奇环保工程有限公司 as the successful supplier for the 2026年白碱滩区生态环境监测和监察能力提升项目.","The published schedule includes one Eranntex (逸云天) portable particulate detector and two four-gas detectors.",[5567],{"id":5568,"label":5569,"target":5570},"xinjiang-official-notice","Read the official award notice on 新疆公共资源交易网",{"kind":5558,"sourceId":5571},"news-ref-xinjiang-award-20261010",{"id":5573,"paragraphs":5574},"award-scope",[5575],"These notices record procurement awards and the listed instruments. They do not confirm delivery, installation or operating results.",{"id":5577,"paragraphs":5578,"links":5580},"project-contact",[5579],"To discuss gas detection requirements for a procurement project, contact Eranntex with your application requirements.",[5581],{"id":5582,"label":5583,"target":5584},"contact-eranntex","contact Eranntex",{"kind":5585,"path":52},"internal","Editorial cover with a BTYQ-MS600-S2 product photograph. This image does not show equipment delivered to either procurement project.",{"body":5588,"mediaCaption":5620,"market":315,"locale":316,"publication":5621,"seo":5622,"title":1035,"summary":5625},[5589,5592,5601,5610,5613],{"id":5544,"paragraphs":5590},[5591],"逸云天祝贺鲁科检测科技（海南）有限公司和新疆博奇环保工程有限公司分别在青岛和新疆的政府采购项目中标。官方中标公告的采购清单列有逸云天（Eranntex）仪器。",{"id":5548,"heading":5593,"paragraphs":5594,"links":5597},"青岛设备采购",[5595,5596],"2026 年 10 月 17 日发布的官方公告显示，鲁科检测科技（海南）有限公司为一个设备采购包的中标供应商，采购人为青岛市特种设备检验研究院。","公布的采购清单列有 4 台逸云天 BTYQ-MS600-S2 有毒有害气体分析仪和 1 台逸云天 MS104K-L 氧气检测仪。",[5598],{"id":5555,"label":5599,"target":5600},"在国家公共资源交易平台查看官方中标公告",{"kind":5558,"sourceId":5559},{"id":5561,"heading":5602,"paragraphs":5603,"links":5606},"新疆环境监测采购",[5604,5605],"2026 年 10 月 10 日发布的官方公告显示，新疆博奇环保工程有限公司为“2026年白碱滩区生态环境监测和监察能力提升项目”的中标供应商。","公布的采购清单包括 1 台逸云天便携式颗粒物检测仪和 2 台四合一气体检测仪。",[5607],{"id":5568,"label":5608,"target":5609},"在新疆公共资源交易网查看官方中标公告",{"kind":5558,"sourceId":5571},{"id":5573,"paragraphs":5611},[5612],"这些公告记录的是中标结果和所列仪器，并不说明交付、安装或运行情况。",{"id":5577,"paragraphs":5614,"links":5616},[5615],"如需讨论政府采购项目中的气体检测需求，请联系逸云天并说明应用要求。",[5617],{"id":5582,"label":5618,"target":5619},"联系逸云天",{"kind":5585,"path":52},"编辑配图，使用 BTYQ-MS600-S2 产品照片。图中设备并非交付给上述任一采购项目的设备。",{"status":663,"indexable":10},{"title":5623,"description":5624},"青岛、新疆政府采购中标公告","逸云天祝贺鲁科检测科技（海南）有限公司和新疆博奇环保工程有限公司中标，公布的采购清单列有逸云天仪器。","官方中标公告的采购清单列有逸云天仪器。逸云天向中标供应商表示祝贺。",[],{"productIds":5628,"gasIds":5629,"industryIds":5630,"applicationIds":5631,"id":282,"slug":1037,"type":1032,"status":3921,"language":18,"revision":5522,"issueDate":5523,"author":5524,"media":5632,"certificateIds":5640,"marketContent":5641,"sources":5680},[],[],[],[],{"id":5633,"url":5634,"mimeType":4039,"width":5635,"height":5636,"alt":5637,"localizedAlt":5638},"local-oman-visit-photo","\u002Fimages\u002Fresources\u002Foman-customers-eranntex-reception-visit.jpg",4032,3024,"Eranntex team members and visitors from Oman in front of the Eranntex reception sign.",{"zh-CN":5639},"逸云天团队成员与阿曼来访客户在逸云天前台标识前合影。",[],[5642,5663],{"market":17,"locale":18,"publication":5643,"title":5644,"summary":5645,"seo":5646,"mediaCaption":5648,"body":5649},{"status":663,"indexable":10},"Eranntex Welcomes Customers from Oman to Discuss Refrigerated Vehicle Gas Detection","Customers from Oman visited Eranntex to discuss application requirements and potential cooperation on a refrigerated vehicle gas detection and connectivity project.",{"title":5647,"description":5645},"Oman Customer Visit: Refrigerated Vehicle Gas Detection","Eranntex team members with visiting customers from Oman.",[5650,5655],{"id":5651,"paragraphs":5652},"oman-customer-visit",[5653,5654],"Eranntex welcomed customers from Oman for business and technical discussions about a gas detection and connectivity project for refrigerated vehicles.","The visit provided an opportunity for the customers and the Eranntex team to discuss the project’s application requirements and potential cooperation.",{"id":5656,"paragraphs":5657,"links":5659},"discuss-your-project",[5658],"To discuss gas detection and connectivity requirements for refrigerated vehicles, contact Eranntex with your project details.",[5660],{"id":5661,"label":5583,"target":5662},"oman-contact-eranntex",{"kind":5585,"path":52},{"mediaCaption":5664,"body":5665,"market":315,"locale":316,"publication":5676,"seo":5677,"title":1040,"summary":5679},"逸云天团队成员与来访的阿曼客户合影。",[5666,5670],{"id":5651,"paragraphs":5667},[5668,5669],"逸云天接待了来自阿曼的客户，双方就一个冷藏车气体检测与联网项目进行了商务和技术交流。","这次来访让客户与逸云天团队有机会讨论项目的应用需求和潜在合作。",{"id":5656,"paragraphs":5671,"links":5673},[5672],"如需讨论冷藏车的气体检测与联网需求，请联系逸云天并提供项目详情。",[5674],{"id":5661,"label":5618,"target":5675},{"kind":5585,"path":52},{"status":663,"indexable":10},{"title":5678,"description":5679},"阿曼客户来访：冷藏车气体检测","阿曼客户到访逸云天，就冷藏车气体检测与联网项目的应用需求和潜在合作进行交流。",[],{"productIds":5682,"gasIds":5683,"industryIds":5684,"applicationIds":5685,"id":260,"slug":1042,"type":1032,"status":3921,"language":18,"revision":5522,"issueDate":5523,"author":5524,"media":5686,"certificateIds":5692,"marketContent":5693,"sources":5730},[],[],[],[],{"id":5687,"url":5688,"mimeType":1220,"width":1235,"height":1264,"alt":5689,"localizedAlt":5690},"local-customer-visit-photo","\u002Fimages\u002Fresources\u002Fcustomer-visit-custom-vehicle-exhaust-project.png","Eranntex representatives and visitors seated around a dining table.",{"zh-CN":5691},"逸云天代表与来访客户围坐在餐桌旁。",[],[5694,5713],{"market":17,"locale":18,"publication":5695,"title":5696,"summary":5697,"seo":5698,"mediaCaption":5700,"body":5701},{"status":663,"indexable":10},"Eranntex Welcomes Customer for Training on a Custom Vehicle Exhaust Gas Project","A customer visited Eranntex to learn about installation, operation, troubleshooting and maintenance for three sample systems ordered for a custom vehicle exhaust gas project.",{"title":5699,"description":5697},"Customer Training for a Custom Exhaust Gas Project","Eranntex representatives and visitors share a meal during the visit.",[5702,5707],{"id":5703,"paragraphs":5704},"customer-visit",[5705,5706],"Eranntex welcomed a customer who has ordered three sample systems for a custom exhaust gas project for construction vehicles. The visit focused on learning how to install, operate and maintain the systems, including how to troubleshoot common problems.","The customer is preparing to undertake installation and repair work for the end user. Understanding the sample systems and their maintenance requirements was therefore a key purpose of the visit.",{"id":5656,"paragraphs":5708,"links":5710},[5709],"To discuss a custom exhaust gas project for construction vehicles, contact Eranntex with your application requirements.",[5711],{"id":5582,"label":5583,"target":5712},{"kind":5585,"path":52},{"mediaCaption":5714,"body":5715,"market":315,"locale":316,"publication":5726,"seo":5727,"title":1045,"summary":5729},"来访期间，逸云天代表与来访客户一起用餐。",[5716,5720],{"id":5703,"paragraphs":5717},[5718,5719],"逸云天接待了一位客户。该客户为工程车辆定制尾气项目订购了三套样机，此次来访重点学习系统的安装、操作和维护，包括常见故障的排查方法。","客户正准备为最终用户承担安装和维修工作，因此了解样机及其维护要求是此次来访的主要目的。",{"id":5656,"paragraphs":5721,"links":5723},[5722],"如需讨论工程车辆定制尾气项目，请联系逸云天并说明应用要求。",[5724],{"id":5582,"label":5618,"target":5725},{"kind":5585,"path":52},{"status":663,"indexable":10},{"title":5728,"description":5729},"定制尾气项目客户培训","客户到访逸云天，学习为定制车辆尾气项目订购的三套样机的安装、操作、故障排查和维护。",[],{"productIds":5732,"gasIds":5733,"industryIds":5734,"applicationIds":5735,"id":271,"slug":1047,"type":1048,"status":3921,"language":18,"revision":5736,"issueDate":5523,"author":4178,"media":5737,"certificateIds":5744,"marketContent":5745,"sources":6536},[],[64],[],[],"1.0",{"id":5738,"url":5739,"alt":5740,"width":4183,"height":4184,"mimeType":705,"roles":5741,"localizedAlt":5742},"media-w03-h2s-peak-low-twa-editorial-cover","\u002Fimages\u002Fresources\u002Fh2s-peak-low-twa-record-review-eranntex.webp","Eranntex technical guide: High H₂S peak, but low TWA? A magnifying glass inspects an illustrative peak in monitoring records.",[708],{"zh-CN":5743},"逸云天技术指南：H₂S 峰值高，TWA 却很低？放大镜正在查看监测记录中的一个示例峰值。",[],[5746,6203],{"market":17,"locale":18,"publication":5747,"title":5748,"summary":5749,"body":5750,"faq":5847,"seo":5868,"recordReview":5871,"mediaCaption":6202,"mediaLayout":5515},{"status":663,"indexable":10},"High H₂S Peak, Low TWA: What to Check Next","A high hydrogen sulfide (H₂S) peak and a low time-weighted average (TWA) can describe the same monitoring period. A low TWA does not cancel the peak. Check the event time and sampling location, the TWA calculation window and reset history, and the measurement records around the event.",[5751,5768,5794,5805,5824,5832,5840],{"id":5752,"heading":5753,"navLabel":5753,"paragraphs":5754,"links":5757},"start-with-the-files","Can a high peak and a low TWA both be correct?",[5755,5756],"A high H₂S peak and a low TWA are not necessarily contradictory. A peak is a reported maximum; a TWA averages readings over a defined period. Those numbers alone do not establish an instrument fault.","A low average does not cancel a recorded peak. Check the event against the applicable short-term or ceiling criterion, using the required measurement method. An event peak is not itself a short-term average.",[5758,5763],{"id":5759,"label":5760,"target":5761},"start-with-the-files-us","OSHA: Hydrogen Sulfide — Standards",{"kind":5558,"sourceId":5762},"osha-hydrogen-sulfide-standards",{"id":5764,"label":5765,"target":5766},"start-with-the-files-gb","HSE EH40\u002F2005, Fourth Edition 2020",{"kind":5558,"sourceId":5767},"w03-ref-gb",{"id":5769,"heading":5770,"navLabel":5770,"paragraphs":5771,"links":5774},"what-to-check-next","What should I check first?",[5772,5773],"First check where and when H₂S was sampled, which period the TWA covers, and whether the surrounding measurements are available. This establishes whether the two values describe the same monitoring task and period.","A remote sample from a tank and a reading from a monitor worn by a worker answer different questions. For personal gas monitoring, record who wore the monitor and where it was worn.",[5775,5780,5785,5790],{"id":5776,"label":5777,"target":5778},"what-to-check-next-study","Comparison of 3 methods characterizing H2S exposure in water and wastewater management work",{"kind":5558,"sourceId":5779},"w03-ref-study",{"id":5781,"label":5782,"target":5783},"what-to-check-next-blackline","External manufacturer reference — Blackline Safety: G7c\u002FG7x TWA and STEL guidance",{"kind":5558,"sourceId":5784},"w03-ref-blackline",{"id":5786,"label":5787,"target":5788},"what-to-check-next-gasclip","External manufacturer reference — Gas Clip Technologies: MGC Simple Plus manual, v1.04",{"kind":5558,"sourceId":5789},"w03-ref-gasclip",{"id":5791,"label":5792,"target":5793},"what-to-check-next-context-0","Personal gas monitoring: placement and recording requirements",{"kind":5585,"path":48},{"id":5795,"heading":5796,"navLabel":5796,"paragraphs":5797,"links":5801},"reported-twa","Could a restart or setting change explain the TWA?",[5798,5799,5800],"A restart, manual reset or setting change can alter an H₂S TWA, depending on the model, firmware and configuration. Check whether the calculation was cleared, retained or paused before treating the reading as a complete-shift result.","One published model-specific example allows TWA and short-term exposure limit (STEL) readings to be retained with firmware 3.422 or later and retention enabled. Both values survive shutdowns shorter than 15 minutes. For shutdowns longer than 15 minutes but shorter than eight hours, TWA and peak readings survive, but STEL resets.","Those conditions belong to the models identified in the source note. For an Eranntex monitor, send us its model, firmware and relevant restart times with the original records. Ask for the matching calculation and reset instructions; do not transfer another model’s retention settings to your instrument.",[5802],{"id":5803,"label":5782,"target":5804},"reported-twa-blackline",{"kind":5558,"sourceId":5784},{"id":5806,"heading":5807,"navLabel":5807,"paragraphs":5808,"links":5813},"peak-without-a-curve","What if the peak is logged but readings are missing?",[5809,5810,5811,5812],"An H₂S alarm-event peak is a reported maximum, not a concentration history. If measurement intervals are absent, the peak cannot reconstruct their concentrations or a 15-minute average. The recorded alarm duration also does not establish total exposure duration.","Export scope, compression and storage overwrite are different possibilities to investigate. The examples below show what each can mean and which evidence to request. They do not diagnose the cause of a gap in your file.","For water and wastewater H₂S monitoring, retain the task and sampling-location record as well as the instrument files. The Norwegian study below illustrates why an alarm summary can remain available after its matching measurement history is no longer available.","A full memory does not always behave this way. When the BTYQ-MS104K-S2 fills its storage, it stops logging rather than overwriting older records. On that instrument, a full memory leaves a gap after the point where it filled, not a loss of earlier history. Check the storage status before treating a gap at the end of a file as a sensor or export fault.",[5814,5817,5820],{"id":5815,"label":5787,"target":5816},"peak-without-a-curve-gasclip",{"kind":5558,"sourceId":5789},{"id":5818,"label":5777,"target":5819},"peak-without-a-curve-study",{"kind":5558,"sourceId":5779},{"id":5821,"label":5822,"target":5823},"peak-without-a-curve-context-0","Water and wastewater monitoring: tasks and sampling locations",{"kind":5585,"path":79},{"id":5825,"heading":5826,"navLabel":5826,"paragraphs":5827,"links":5831},"jurisdiction","Which H₂S exposure limit should I compare with?",[5828,5829,5830],"Choose the H₂S exposure criterion for the workplace jurisdiction, sector and measurement period. A ceiling, an eight-hour TWA and a short-term average are different criteria. Satisfying one does not establish that the others are satisfied.","Ask the person responsible for your site’s exposure assessment which criterion and measurement method apply. The report’s language does not select the law. The five examples below are references, not alarm settings or permission to work.","WEL means workplace exposure limit; PEL means permissible exposure limit; STEL means short-term exposure limit. Australia’s WES label means workplace exposure standards. The table retains its 18 October 2026 source snapshot and jurisdiction-specific conditions.",[],{"id":5833,"heading":5834,"navLabel":5834,"paragraphs":5835,"links":5839},"review-note","What should I send to technical support?",[5836,5837,5838],"For an Eranntex H₂S record query, send us the model, firmware, event time, sampling task and original event and measurement files. Include known restarts or setting changes. This gives the query a specific instrument, period and set of records to investigate.","For a new instrument enquiry, specify the recording evidence you need before selecting a model. The BTYQ-MS104K-S2 example below separates documented capabilities from the file and firmware details that still need confirmation for your configuration.","Use the editable support message for an existing event, or the recording checklist for a new project. Unknown information can remain marked unknown. Do not include worker names or other personal details unless needed for the request.",[],{"id":5841,"heading":5842,"navLabel":5842,"paragraphs":5843,"links":5846},"worked-record","Optional: follow a fictional 20-minute example",[5844,5845],"In this fictional H₂S case, a peak falls within two minutes of missing measurements. The files cannot establish the complete 20-minute average or explain the separate reported TWA. The example contains no real worker or detector data.","The example data pack below contains the files and values used in the exercise. Download it if you want to inspect the rows. Read the four-file guide before comparing the event and summary with the measurements.",[],[5848,5852,5856,5860,5864],{"id":5849,"question":5850,"answer":5851},"w03-faq-1","Does a low H₂S TWA mean the recorded peak can be ignored?","A low H₂S TWA does not justify ignoring a recorded peak or an active alarm. Follow your site’s alarm response procedure. For the later review, identify the peak’s sampling context and the applicable exposure criterion. An alarm-event peak and a short-term exposure average are different quantities.",{"id":5853,"question":5854,"answer":5855},"w03-faq-2","Can I calculate a 15-minute exposure average from an alarm peak?","A peak value and alarm-event duration do not describe concentration throughout a 15-minute period. Obtain suitable time-resolved measurements for the required assessment method. If intervals are absent, identify what they represent before calculating an average. Neither a single peak nor a low displayed TWA supplies the missing concentrations.",{"id":5857,"question":5858,"answer":5859},"w03-faq-3","Can missing readings be entered as zero?","An unexplained gap in an H₂S export is not a zero reading. A documented compressed record may represent repeated readings, but its interpretation depends on the file definition. Check export scope and storage history before treating the gap analytically. Preserve the original file and document any later reconstruction or treatment.",{"id":5861,"question":5862,"answer":5863},"w03-faq-4","Does restarting a detector always reset its TWA?","Restarting an H₂S detector does not have one universal effect on TWA. Power-off, configuration changes, manual resets and retention settings can affect the result differently. Check the instructions for the actual model and firmware, together with the event and restart times. A post-restart display alone does not establish complete-shift coverage.",{"id":5865,"question":5866,"answer":5867},"w03-faq-5","Which country's limit should an English-language report use?","Use the H₂S exposure criterion governing the workplace jurisdiction, sector and measurement period. English-language reporting does not make US rules the default. Identify the relevant national, state, provincial or territory authority and the criterion’s effective version. Record why that criterion applies, separately from the instrument’s configured alarm settings.",{"title":5869,"description":5870},"High H2S Peak, Low TWA: What to Check Next","High H₂S peak but low TWA? Check sampling context, resets, export scope and missing readings, with worked records and jurisdiction-specific references.",{"sectionRoles":5872,"measurements":5873,"event":5942,"summary":5947,"findings":5950,"jurisdictions":5972,"downloads":6033,"relatedLinks":6039,"practical":6043,"visualExample":6059,"logChecks":6082,"logReferences":6106,"manufacturerExample":6113,"workedExample":6138,"recordingChecklist":6159,"labels":6188},{"arithmetic":5752,"record":5841,"jurisdiction":5825,"review":5833,"related":5833,"mechanisms":5806,"nextChecks":5769},[5874,5880,5884,5887,5890,5895,5898,5902,5905,5909,5912,5915,5918,5921,5924,5927,5930,5933,5936,5939],{"id":5875,"time":5876,"end":5877,"mean":5878,"status":5879},"M01","09:00","09:01","0.000","valid",{"id":5881,"time":5877,"end":5882,"mean":5883,"status":5879},"M02","09:02","0.200",{"id":5885,"time":5882,"end":5886,"mean":5883,"status":5879},"M03","09:03",{"id":5888,"time":5886,"end":5889,"mean":5883,"status":5879},"M04","09:04",{"id":5891,"time":5889,"end":5892,"mean":5893,"status":5894},"M05","09:05",null,"missing",{"id":5896,"time":5892,"end":5897,"mean":5893,"status":5894},"M06","09:06",{"id":5899,"time":5897,"end":5900,"mean":5901,"status":5879},"M07","09:07","0.400",{"id":5903,"time":5900,"end":5904,"mean":5901,"status":5879},"M08","09:08",{"id":5906,"time":5904,"end":5907,"mean":5908,"status":5879},"M09","09:09","0.100",{"id":5910,"time":5907,"end":5911,"mean":5878,"status":5879},"M10","09:10",{"id":5913,"time":5911,"end":5914,"mean":5878,"status":5879},"M11","09:11",{"id":5916,"time":5914,"end":5917,"mean":5878,"status":5879},"M12","09:12",{"id":5919,"time":5917,"end":5920,"mean":5878,"status":5879},"M13","09:13",{"id":5922,"time":5920,"end":5923,"mean":5878,"status":5879},"M14","09:14",{"id":5925,"time":5923,"end":5926,"mean":5878,"status":5879},"M15","09:15",{"id":5928,"time":5926,"end":5929,"mean":5878,"status":5879},"M16","09:16",{"id":5931,"time":5929,"end":5932,"mean":5878,"status":5879},"M17","09:17",{"id":5934,"time":5932,"end":5935,"mean":5878,"status":5879},"M18","09:18",{"id":5937,"time":5935,"end":5938,"mean":5878,"status":5879},"M19","09:19",{"id":5940,"time":5938,"end":5941,"mean":5878,"status":5879},"M20","09:20",{"id":5943,"start":5944,"end":5945,"peak":5946,"duration":11},"E01","09:04:15","09:04:45","12.000",{"id":5948,"value":5949},"summary.json","0.030",[5951,5958,5965],{"id":5952,"title":5953,"known":5954,"unknown":5955,"request":5956,"rows":5957},"peak","Peak without the surrounding curve","Alarm event E01 reports a 12.000 ppm peak and a 30-second alarm duration.","The concentrations during missing intervals M05 and M06, the total exposure duration and the true atmospheric maximum remain unknown.","Obtain the associated measurements, event-field definition and export or storage description.",[5943,5891,5896],{"id":5959,"title":5960,"known":5961,"unknown":5962,"request":5963,"rows":5964},"gap","Zero and missing are different","Measurement M01 is a valid 0.000 ppm one-minute mean. M05 and M06 have no values. Eighteen of twenty minutes have numeric values.","The files do not explain why two intervals are missing or what concentrations occurred then.","Check the original download scope, status information and relevant activity records.",[5875,5891,5896],{"id":5966,"title":5967,"known":5968,"unknown":5969,"request":5970,"rows":5971},"twa","A reported TWA without its calculation history","The summary file labels 0.030 ppm as a reported TWA.","Its calculation period, input readings and reset history are unspecified. The wearer and sample location are also unknown.","Obtain the actual model and firmware instructions, settings, monitoring times and instrument assignment.",[5948],[5973,5983,5993,6005,6017],{"id":5974,"name":5975,"basis":5976,"values":5977,"period":5978,"implication":5979,"references":5980},"us-general","United States — federal OSHA, general industry","29 CFR 1910.1000, Table Z-2; check applicable State Plan rules and worker\u002Fsector coverage","20 ppm ceiling; a 50 ppm peak exception has specific conditions","Exception: one period of no more than 10 minutes, only if there is no other measurable exposure during the 8-hour shift","This is not an 8-hour TWA row. State Plans may have different or more stringent requirements. A low displayed TWA does not answer the ceiling question.",[5981],{"id":5762,"label":5760,"url":5982},"https:\u002F\u002Fwww.osha.gov\u002Fhydrogen-sulfide\u002Fstandards",{"id":5984,"name":5985,"basis":5986,"values":5987,"period":5988,"implication":5989,"references":5990},"gb","Great Britain — EH40","EH40\u002F2005 Table 1, H2S entry","5 ppm long-term WEL; 10 ppm short-term WEL","8-hour and 15-minute reference periods","Keep the reference period and evaluation method with the number. An event maximum is not a 15-minute average.",[5991],{"id":5767,"label":5765,"url":5992},"https:\u002F\u002Fwww.hse.gov.uk\u002Fpubns\u002Fpriced\u002Feh40.pdf",{"id":5994,"name":5995,"basis":5996,"values":5997,"period":5998,"implication":5999,"references":6000},"sg","Singapore — WSH General Provisions","Regulation 2 definitions and First Schedule","10 ppm long-term PEL; 15 ppm short-term PEL","8-hour working day \u002F 40-hour work week; 15-minute short-term period","Use Singapore's actual PEL definitions. Singapore is an example, not a substitute for the laws of other Southeast Asian countries.",[6001],{"id":6002,"label":6003,"url":6004},"w03-ref-sg","Singapore WSH (General Provisions) Regulations","https:\u002F\u002Fsso.agc.gov.sg\u002FSL\u002FWSHA2006-RG1?ProvIds=Sc1-&ViewType=Within",{"id":6006,"name":6007,"basis":6008,"values":6009,"period":6010,"implication":6011,"references":6012},"ontario","Ontario, Canada — Regulation 833 table","Current Ontario occupational-exposure table, H2S row","10 ppm TWA; 15 ppm STEL","Use the Regulation 833 reference-period and workplace requirements","Identify the applicable province or federal regime. Do not label this a Canada-wide limit.",[6013],{"id":6014,"label":6015,"url":6016},"w03-ref-ontario","Current occupational exposure limits for Ontario workplaces under Regulation 833","https:\u002F\u002Fwww.ontario.ca\u002Fpage\u002Fcurrent-occupational-exposure-limits-ontario-workplaces-under-regulation-833",{"id":6018,"name":6019,"basis":6020,"values":6021,"period":6022,"implication":6023,"references":6024},"au","Australia — national WES reference","November 2025 national WES reference; confirm applicable Commonwealth, state or territory law and effective dates","10 ppm 8-hour TWA; 15 ppm 15-minute STEL","8 hours and 15 minutes; confirm jurisdictional adoption and commencement before applying the national reference","The 24 June 2026 update says H2S levels remain unchanged at the 1 December 2026 transition. The proposed 1\u002F5 ppm option is not treated here as adopted law.",[6025,6029],{"id":6026,"label":6027,"url":6028},"w03-ref-au","Safe Work Australia: Workplace exposure standards, amended November 2025","https:\u002F\u002Fwww.safeworkaustralia.gov.au\u002Fsites\u002Fdefault\u002Ffiles\u002F2025-11\u002Fworkplace-exposure-standards-amended-november2025.pdf",{"id":6030,"label":6031,"url":6032},"w03-ref-au-update","Safe Work Australia, 24 June 2026: publication of decision impact statement for nine chemicals","https:\u002F\u002Fwww.safeworkaustralia.gov.au\u002Fmedia-centre\u002Fnews\u002Fpublication-decision-regulation-impact-statement-proposed-workplace-exposure-limits-9-chemicals",{"base":6034,"packet":6035,"arithmetic":6036,"worksheet":6037,"diagram":6038},"\u002Fdownloads\u002Fw03-record-review\u002F","\u002Fdownloads\u002Fw03-record-review\u002Fw03-teaching-packet.zip","\u002Fdownloads\u002Fw03-record-review\u002Fcomplete-arithmetic-example.csv","\u002Fdownloads\u002Fw03-record-review\u002Freview-worksheet.csv","\u002Fdownloads\u002Fw03-record-review\u002Fpeak-average-example.svg",[6040],{"label":6041,"url":289,"description":6042},"Technical support for an existing instrument","Prepare a request with the actual model, firmware, event and available records.",{"firstAction":6044,"checks":6045,"requestTemplate":6058},"If the monitor is alarming now, follow your site’s alarm response procedure. Do not use a low TWA to dismiss the alarm or decide that work can continue. The checks below are for reviewing the readings after the event.",[6046,6050,6054],{"title":6047,"action":6048,"outcome":6049},"Match the peak to the sampling task","Record the gas, units, peak and timestamp. Was the monitor worn by a worker, sampling remotely, or being exposed to test gas?","A remote sample describes air at the sampling point. It does not, by itself, establish the worker’s breathing-zone exposure.",{"title":6051,"action":6052,"outcome":6053},"Identify the TWA window and any resets","Check the model instructions and settings for the averaging period. Compare the alarm time with power-off, restart, manual-reset and mode-change records.","If the calculation window or reset history is unknown, do not label the displayed TWA as a complete-shift result.",{"title":6055,"action":6056,"outcome":6057},"Check the measurements around the event","Keep the original event and measurement exports. Note the software version and download scope; retain a timestamped screenshot if no export is available.","If rows are absent, use the checks below to investigate export scope, compression and overwrite. A peak cannot supply the missing concentrations.","Monitor model, serial number and firmware:\nSoftware version and selected download scope:\nEvent date, time and time zone:\nGas, units, recorded peak and alarm-event duration:\nDisplayed TWA and configured calculation period, if known:\nPower-off, restart, manual reset or mode changes:\nSampling task and sample location \u002F monitor placement:\nOriginal event and measurement files or timestamped screenshots available:\n\nPlease confirm what the peak and TWA cover, how missing or compressed intervals are represented, which reset and retention rules apply, and what further records are needed.",{"title":6060,"intro":6061,"sourceFile":6062,"periodMinutes":6063,"maximumMinuteMeanPpm":1246,"periodMeanPpm":6064,"bars":6065,"formula":6078,"scaleNote":6079,"boundary":6080,"downloadLabel":6081},"Why can the two numbers be so different?","Imagine eight hours with a valid mean for every minute: one minute at 12 parts per million (ppm) and the other 479 minutes at zero.","complete-arithmetic-example.csv",480,0.025,[6066,6072],{"id":6067,"button":6068,"label":6069,"value":6070,"explanation":6071},"minute","Look at the highest minute","Highest one-minute mean","12","The highest saved one-minute mean is 12 ppm. This describes one minute; it does not tell you the highest instantaneous concentration.",{"id":6073,"button":6074,"label":6075,"value":6076,"explanation":6077},"period","Look at the eight-hour mean","Mean across all 480 minutes","0.025","All 480 minutes count in this average. The 479 zero-valued minutes bring the mean down to 0.025 ppm, while the 12 ppm minute remains in the record.","(12 ppm × 1 min + 0 ppm × 479 min) ÷ 480 min = 0.025 ppm","Both bars use the same 0–12 ppm scale. The average bar is only 1\u002F480 of the upper bar, so it is barely visible.","Fictional arithmetic illustration. These are complete one-minute means, not a sensor trace or a real detector’s peak field. This example does not define an instrument’s TWA algorithm or establish an acceptable exposure.","Download this illustration (SVG)",[6083,6091,6098],{"id":6084,"mechanism":6085,"example":6086,"action":6087,"boundary":6088,"referenceIds":6089},"scope","A restricted download scope","Download selections include events only, the last week, records since the previous download, or the full log.","Record the selected scope and retrieve the measurement log covering the event, if still available. A broader download cannot establish that overwritten measurements are recoverable.","Example from the referenced manual and software; check the options for your instrument.",[6090],"gasclip",{"id":6092,"mechanism":6093,"example":6094,"action":6095,"boundary":6096,"referenceIds":6097},"compression","Compressed repeated records","The same manual describes one-second status logging with compression of redundant records.","Check how the software represents repeated values and elapsed time. Compression alone does not establish lost measurements or zero concentration. Do not turn unexplained blanks into zeros.","The manual does not establish a rule that every absent export row means zero.",[6090],{"id":6099,"mechanism":6100,"example":6101,"action":6102,"boundary":6103,"referenceIds":6104},"overwrite","Separate circular storage","A 2024 Norwegian water and wastewater study reported 15-second logging and 16 hours of wraparound storage. Alarm records used separate storage, so a peak could be extracted without its corresponding measurement log.","Check the logging interval, storage capacity and download delay. Ask whether event and measurement records have separate retention rules. Circular storage overwrites older records when its space is reused.","Study equipment and conditions; not an Eranntex storage specification or a universal detector rule.",[6105],"study",[6107,6110],{"id":6105,"label":6108,"url":6109},"Study: methods and equipment","https:\u002F\u002Fpmc.ncbi.nlm.nih.gov\u002Farticles\u002FPMC11306318\u002F",{"id":6090,"label":6111,"url":6112},"Manual, pp. 14–15","https:\u002F\u002Fwww.gascliptech.com\u002Fproducts\u002Fmgc-simple-plus\u002Fdownloads\u002FUM-MGC-S-P%20v1.04%20WEB.pdf",{"title":6114,"model":6115,"intro":6116,"rows":6117,"boundary":6135,"productLabel":6136,"productUrl":208,"rfqLabel":6137,"rfqUrl":300},"Eranntex example: specify the records you need","BTYQ-MS104K-S2","These recording details are settled for the BTYQ-MS104K-S2.",[6118,6120,6123,6126,6129,6132],{"capability":6119,"documented":5093},"Sampling method",{"capability":6121,"documented":6122},"Record capacity","More than 1,000,000 records as standard",{"capability":6124,"documented":6125},"When storage is full","Logging stops; older records are not overwritten. Records can be deleted on the instrument.",{"capability":6127,"documented":6128},"Storage interval","Configurable",{"capability":6130,"documented":6131},"Alarm records","Content is set for the instrument and can be customised",{"capability":6133,"documented":6134},"Data export","Records can be viewed, deleted and exported on the instrument, with USB-C data connection. The export format is set to the project's requirements.","Three points depend on the instrument, firmware and configuration you order: how the TWA behaves after a restart, the default storage interval, and whether alarm events are stored separately from measurements. Our sales engineers can confirm them. Include the logging interval, the alarm values and the file format your review needs in your enquiry.","Review MS104K-S2 specifications and configuration options","Include recording requirements in a project enquiry",{"downloadLabel":6139,"fileGuideIntro":6140,"fileGuide":6141,"details":6153,"calculationNote":6158},"Download example data pack (ZIP)","Start with these four case files. The ZIP also includes a worksheet, supporting notes and the separate eight-hour arithmetic example.",[6142,6145,6148,6151],{"file":6143,"purpose":6144},"metadata.json","Read first. Defines units and what each value means. Timestamps use Coordinated Universal Time (UTC).",{"file":6146,"purpose":6147},"measurements.csv","Contains twenty one-minute intervals labelled M01–M20. NR on this page means no measurement was supplied; it is not zero.",{"file":6149,"purpose":6150},"events.csv","Contains one alarm event, labelled E01, with its start, end, recorded peak and alarm-event duration.",{"file":5948,"purpose":6152},"Contains a reported TWA with intentionally missing calculation details. It is a separate summary, not a result calculated from the measurement CSV.",[6154,6155,6156,6157],"The fictional record covers 09:00–09:20 UTC. Each numeric measurement is defined as a mean for one complete minute. Eighteen minutes have values; the two minutes from 09:04 to 09:06 have none.","Event E01 runs from 09:04:15 to 09:04:45 UTC, inside that gap. It reports a 12 ppm peak and a 30-second alarm duration. The separate summary reports a TWA of 0.030 ppm.","The 0.030 ppm value was chosen for this exercise; its calculation period, inputs and reset history are deliberately unspecified. The files use a generic format, not an Eranntex or other manufacturer’s export.","Use the findings below to separate what the files establish from what is still unknown. You do not need this exercise to use the checks above.","For the 18 valid minutes, the covered-interval mean is 1.500 ppm·min ÷ 18 min = 0.0833 ppm. This is not the complete 20-minute average. The separate 0.030 ppm TWA remains unexplained because its calculation period and inputs are unspecified.",[6160,6164,6168,6172,6176,6180,6184],{"topic":6161,"question":6162,"evidence":6163},"Saved values and event peaks","What does each saved value represent: an instantaneous reading, an interval mean or a maximum? Over which period is an event peak recorded? On the MS104K-S2, the content of an alarm record is set for the instrument and can be customised, so state which values your review needs.","An export from the configured instrument, with value definitions and units.",{"topic":6165,"question":6166,"evidence":6167},"Timestamps and coverage","Do timestamps identify interval starts or ends? How are the time zone, clock changes and recording interruptions documented?","Example timestamps, clock settings and records identifying the monitoring start, stop and gaps.",{"topic":6169,"question":6170,"evidence":6171},"Logging intervals and status flags","Which logging intervals are available? How do missing, invalid, warm-up, fault and over-range states appear in the export?","The supported interval settings and a field or status-code guide for the proposed configuration.",{"topic":6173,"question":6174,"evidence":6175},"TWA calculation and resets","Which averaging period and readings are used? What happens to the calculation after power-off, a reset or a mode change?","Model- and firmware-specific calculation instructions, configuration settings and a reset record where available.",{"topic":6177,"question":6178,"evidence":6179},"Download scope","Which records will be exported, and in what format? For the MS104K-S2, the export format is set to the project's requirements.","A sample export in the agreed format, with its field definitions.",{"topic":6181,"question":6182,"evidence":6183},"Storage and retention","How long does storage last at your logging interval, and who clears it? The MS104K-S2 stops logging when storage is full and does not overwrite older records.","The record capacity for your configuration, and a download-and-delete routine that fits the shift pattern.",{"topic":6185,"question":6186,"evidence":6187},"Instrument, wearer and sample location","How will the records identify the instrument, the wearer where relevant, and the location from which air was sampled?","An instrument assignment or activity record that distinguishes personal monitoring from fixed-point or remote sampling.",{"logCaption":6189,"logDescription":6190,"plotDescription":6191,"measurementIntro":6192,"measurementDescription":6193,"measurementNote":6194,"measurementCaption":6195,"summaryNote":6196,"jurisdictionCaption":6197,"procurementTitle":6198,"arithmeticDownload":6199,"completeValuesDownload":6200,"manufacturerCaption":6201,"eventFile":6149},"Missing H₂S measurements: three checks before interpreting the gap","Three reasons to investigate missing measurements","Two values on the same zero to twelve ppm scale","Fictional example · one-minute interval means · UTC","Twenty one-minute teaching intervals","Each cell represents one minute. NR means no measurement was supplied. No line connects the values across the gap.","Fictional one-minute measurement intervals, UTC","calculation window and inputs not supplied","H₂S exposure-limit reference examples · source snapshot 18 October 2026","Planning new equipment? Confirm these recording requirements","Download separate eight-hour arithmetic example (CSV)","Check the 480 one-minute values (CSV)","BTYQ-MS104K-S2 · documented capabilities and details to confirm","Conceptual illustration of monitoring-record review. The plotted trace is illustrative, not an instrument measurement record.",{"body":6204,"faq":6279,"recordReview":6295,"mediaCaption":6531,"mediaLayout":5515,"market":315,"locale":316,"publication":6532,"seo":6533,"title":1051,"summary":6535},[6205,6217,6235,6244,6259,6266,6273],{"id":5752,"heading":6206,"navLabel":6206,"paragraphs":6207,"links":6210},"峰值高、TWA 低，两者可能都正确吗？",[6208,6209],"H₂S 峰值高、TWA 低，两者并不一定矛盾。峰值是报告的最大值；TWA 是对规定时段内读数的平均。仅凭这两个数字，不能认定仪器有故障。","平均值低并不能抵消已记录的峰值。请按规定的测量方法，将该事件与适用的短时间或上限值标准进行对照。事件峰值本身并不是短时间平均值。",[6211,6214],{"id":5759,"label":6212,"target":6213},"OSHA: Hydrogen Sulfide — Standards（中译：OSHA 硫化氢标准）",{"kind":5558,"sourceId":5762},{"id":5764,"label":6215,"target":6216},"HSE EH40\u002F2005, Fourth Edition 2020（中译：英国 HSE《工作场所接触限值》EH40\u002F2005，2020 年第四版）",{"kind":5558,"sourceId":5767},{"id":5769,"heading":6218,"navLabel":6218,"paragraphs":6219,"links":6222},"首先应该核查什么？",[6220,6221],"首先核查 H₂S 是在何处、何时采样的，TWA 覆盖哪个时段，以及事件前后的测量数据是否可用。由此可以判断这两个数值是否描述同一项监测任务和同一个时段。","从储罐远程抽取的样品，与作业人员佩戴的监测仪读数，回答的是不同的问题。对于个人气体监测，请记录由谁佩戴监测仪以及佩戴在什么位置。",[6223,6226,6229,6232],{"id":5776,"label":6224,"target":6225},"Comparison of 3 methods characterizing H2S exposure in water and wastewater management work（中译：水务与污水管理作业人员 H₂S 暴露表征的三种方法比较）",{"kind":5558,"sourceId":5779},{"id":5781,"label":6227,"target":6228},"外部制造商资料 — Blackline Safety：G7c\u002FG7x TWA 与 STEL 说明",{"kind":5558,"sourceId":5784},{"id":5786,"label":6230,"target":6231},"外部制造商资料 — Gas Clip Technologies：MGC Simple Plus 手册，v1.04",{"kind":5558,"sourceId":5789},{"id":5791,"label":6233,"target":6234},"个人气体监测：佩戴位置与记录要求",{"kind":5585,"path":48},{"id":5795,"heading":6236,"navLabel":6236,"paragraphs":6237,"links":6241},"重启或设置变更会不会影响 TWA？",[6238,6239,6240],"重启、手动重置或设置变更都可能改变 H₂S 的 TWA，具体取决于型号、固件和配置。在把该读数当作整班结果之前，请核查计算是被清零、保留还是暂停。","一个已公开的特定型号示例中，固件为 3.422 或更高版本且启用保留功能时，TWA 和短时间接触限值（STEL）读数可以保留。关机不足 15 分钟时，两项数值都会保留。关机超过 15 分钟但不足 8 小时时，TWA 和峰值读数保留，但 STEL 会重置。","这些条件只适用于来源说明中列出的型号。如果是逸云天的监测仪，请将型号、固件和相关重启时间连同原始记录一起发给我们，并索取对应的计算与重置说明；不要把其他型号的保留设置套用到您的仪器上。",[6242],{"id":5803,"label":6227,"target":6243},{"kind":5558,"sourceId":5784},{"id":5806,"heading":6245,"navLabel":6245,"paragraphs":6246,"links":6251},"峰值有记录，但读数缺失怎么办？",[6247,6248,6249,6250],"H₂S 报警事件峰值是报告的最大值，而不是浓度历史。如果缺少某些测量时段，峰值无法还原这些时段的浓度，也无法还原 15 分钟平均值。记录的报警持续时间也不能代表总接触时长。","导出范围、记录压缩和存储覆盖是需要分别排查的不同可能。下面的示例说明每种情况可能意味着什么，以及应索取哪些证据。它们并不能诊断您文件中缺口的原因。","对于水与污水的 H₂S 监测，除仪器文件外，还应保留作业任务和采样位置记录。下面的挪威研究说明了为什么报警摘要还在，而对应的测量历史却可能已经不在。","存储写满后并不总是这样。BTYQ-MS104K-S2 存储写满后会停止记录，而不会覆盖较早的记录。在这台仪器上，存储写满留下的是写满时刻之后的缺口，而不是较早历史的丢失。在把文件末尾的缺口当作传感器或导出故障之前，请先核查存储状态。",[6252,6254,6256],{"id":5815,"label":6230,"target":6253},{"kind":5558,"sourceId":5789},{"id":5818,"label":6224,"target":6255},{"kind":5558,"sourceId":5779},{"id":5821,"label":6257,"target":6258},"水与污水监测：作业任务与采样位置",{"kind":5585,"path":79},{"id":5825,"heading":6260,"navLabel":6260,"paragraphs":6261,"links":6265},"应与哪项 H₂S 接触限值对照？",[6262,6263,6264],"请根据工作场所所在的司法管辖区、行业和测量时段选择 H₂S 接触标准。上限值、8 小时 TWA 和短时间平均值是不同的标准。满足其中一项，并不代表其他各项也已满足。","请向负责贵现场接触评估的人员确认适用的标准和测量方法。报告使用的语言并不决定适用哪国法律。下面的五个示例仅供参考，不是报警设定值，也不代表允许作业。","WEL 指工作场所接触限值；PEL 指容许接触限值；STEL 指短时间接触限值。澳大利亚的 WES 指工作场所接触标准。表格保留其 2026 年 10 月 18 日的来源快照，以及各司法管辖区的具体条件。",[],{"id":5833,"heading":6267,"navLabel":6267,"paragraphs":6268,"links":6272},"应向技术支持提供哪些信息？",[6269,6270,6271],"如需逸云天协助查询 H₂S 记录，请发送型号、固件、事件时间、采样任务，以及原始事件文件和测量文件，并注明已知的重启或设置变更。这样，查询就有了明确的仪器、时段和需要排查的记录。","如果是新仪器询价，请在选型之前明确所需的记录证据。下面的 BTYQ-MS104K-S2 示例区分了已有文件记载的功能，以及仍需针对您的配置确认的文件和固件细节。","现有事件请使用可编辑的技术支持留言模板，新项目请使用记录要求清单。不清楚的信息可以标注为未知。除非请求确有需要，请不要填写作业人员姓名或其他个人信息。",[],{"id":5841,"heading":6274,"navLabel":6274,"paragraphs":6275,"links":6278},"可选：跟着一个虚构的 20 分钟示例走一遍",[6276,6277],"在这个虚构的 H₂S 案例中，一个峰值出现在缺失测量数据的两分钟之内。这些文件既无法得出完整的 20 分钟平均值，也无法解释单独报告的 TWA。示例中不含任何真实作业人员或检测仪数据。","下面的示例数据包包含本练习使用的文件和数值。如需查看具体数据行，可以下载。在把事件和摘要与测量数据对照之前，请先阅读四个文件的说明。",[],[6280,6283,6286,6289,6292],{"id":5849,"question":6281,"answer":6282},"H₂S 的 TWA 低，是否意味着可以忽略已记录的峰值？","H₂S 的 TWA 低，并不能成为忽略已记录峰值或正在报警的理由。请按照现场的报警响应程序处理。事后复核时，请确认峰值的采样情况和适用的接触标准。报警事件峰值与短时间接触平均值是不同的量。",{"id":5853,"question":6284,"answer":6285},"能否根据报警峰值计算 15 分钟接触平均值？","峰值和报警事件持续时间并不能描述整个 15 分钟时段内的浓度。请按所需的评估方法获取合适的时间分辨测量数据。如果有时段缺失，请在计算平均值之前先弄清这些时段代表什么。单个峰值和显示的较低 TWA 都无法补上缺失的浓度。",{"id":5857,"question":6287,"answer":6288},"缺失的读数能否按零填写？","H₂S 导出数据中无法解释的缺口并不是零读数。有文件说明的压缩记录可能代表重复读数，但其含义取决于文件定义。在对缺口进行分析处理之前，请先核查导出范围和存储历史。请保留原始文件，并记录之后进行的任何重建或处理。",{"id":5861,"question":6290,"answer":6291},"重启检测仪一定会重置 TWA 吗？","重启 H₂S 检测仪对 TWA 并没有统一的影响。关机、配置变更、手动重置和保留设置对结果的影响各不相同。请结合事件时间和重启时间，查阅实际型号和固件的说明。仅凭重启后的显示，不能认定覆盖了整个班次。",{"id":5865,"question":6293,"answer":6294},"报告用中文写，就应采用中国的限值吗？","请采用对工作场所所在司法管辖区、行业和测量时段有效的 H₂S 接触标准。报告用中文撰写，并不意味着默认适用中国规定；项目在境外时，应按当地规定执行。请确认相关的国家、州、省或领地主管机构，以及该标准的生效版本。请记录采用该标准的理由，并与仪器配置的报警设定值分开记录。",{"sectionRoles":6296,"measurements":6297,"event":6318,"summary":6319,"findings":6320,"jurisdictions":6339,"downloads":6385,"relatedLinks":6386,"practical":6390,"visualExample":6406,"logChecks":6421,"logReferences":6440,"manufacturerExample":6445,"workedExample":6470,"recordingChecklist":6488,"labels":6517},{"arithmetic":5752,"record":5841,"jurisdiction":5825,"review":5833,"related":5833,"mechanisms":5806,"nextChecks":5769},[6298,6299,6300,6301,6302,6303,6304,6305,6306,6307,6308,6309,6310,6311,6312,6313,6314,6315,6316,6317],{"id":5875,"time":5876,"end":5877,"mean":5878,"status":5879},{"id":5881,"time":5877,"end":5882,"mean":5883,"status":5879},{"id":5885,"time":5882,"end":5886,"mean":5883,"status":5879},{"id":5888,"time":5886,"end":5889,"mean":5883,"status":5879},{"id":5891,"time":5889,"end":5892,"mean":5893,"status":5894},{"id":5896,"time":5892,"end":5897,"mean":5893,"status":5894},{"id":5899,"time":5897,"end":5900,"mean":5901,"status":5879},{"id":5903,"time":5900,"end":5904,"mean":5901,"status":5879},{"id":5906,"time":5904,"end":5907,"mean":5908,"status":5879},{"id":5910,"time":5907,"end":5911,"mean":5878,"status":5879},{"id":5913,"time":5911,"end":5914,"mean":5878,"status":5879},{"id":5916,"time":5914,"end":5917,"mean":5878,"status":5879},{"id":5919,"time":5917,"end":5920,"mean":5878,"status":5879},{"id":5922,"time":5920,"end":5923,"mean":5878,"status":5879},{"id":5925,"time":5923,"end":5926,"mean":5878,"status":5879},{"id":5928,"time":5926,"end":5929,"mean":5878,"status":5879},{"id":5931,"time":5929,"end":5932,"mean":5878,"status":5879},{"id":5934,"time":5932,"end":5935,"mean":5878,"status":5879},{"id":5937,"time":5935,"end":5938,"mean":5878,"status":5879},{"id":5940,"time":5938,"end":5941,"mean":5878,"status":5879},{"id":5943,"start":5944,"end":5945,"peak":5946,"duration":11},{"id":5948,"value":5949},[6321,6327,6333],{"id":5952,"title":6322,"known":6323,"unknown":6324,"request":6325,"rows":6326},"只有峰值，没有前后曲线","报警事件 E01 报告的峰值为 12.000 ppm，报警持续时间为 30 秒。","缺失时段 M05 和 M06 的浓度、总接触时长以及真实的大气最大值仍然未知。","索取相关的测量数据、事件字段定义，以及导出或存储说明。",[5943,5891,5896],{"id":5959,"title":6328,"known":6329,"unknown":6330,"request":6331,"rows":6332},"零和缺失不是一回事","测量 M01 是有效的 1 分钟平均值 0.000 ppm。M05 和 M06 没有数值。20 分钟中有 18 分钟有数值。","这些文件没有说明为什么缺少两个时段，也没有说明当时的浓度是多少。","核查原始下载范围、状态信息和相关的作业记录。",[5875,5891,5896],{"id":5966,"title":6334,"known":6335,"unknown":6336,"request":6337,"rows":6338},"报告了 TWA，却没有计算历史","摘要文件把 0.030 ppm 标为报告的 TWA。","其计算时段、输入读数和重置历史都没有说明。佩戴者和采样位置也不清楚。","索取实际型号和固件的说明、设置、监测时间以及仪器分配记录。",[5948],[6340,6348,6356,6365,6374],{"id":5974,"name":6341,"basis":6342,"values":6343,"period":6344,"implication":6345,"references":6346},"美国 — 联邦 OSHA，一般行业","29 CFR 1910.1000，表 Z-2；请核查适用的州计划（State Plan）规定及其对作业人员和行业的覆盖范围","上限值 20 ppm；50 ppm 峰值例外有特定条件","例外：仅一次，不超过 10 分钟，且仅限于 8 小时班次内没有其他可测量的接触","这一行不是 8 小时 TWA。州计划可能有不同或更严格的要求。显示的 TWA 较低，并不能回答是否超过上限值的问题。",[6347],{"id":5762,"label":6212,"url":5982},{"id":5984,"name":6349,"basis":6350,"values":6351,"period":6352,"implication":6353,"references":6354},"英国（大不列颠）— EH40","EH40\u002F2005 表 1，H₂S 条目","长期 WEL 5 ppm；短期 WEL 10 ppm","8 小时和 15 分钟参考时段","数值须与其参考时段和评估方法一起使用。事件最大值不是 15 分钟平均值。",[6355],{"id":5767,"label":6215,"url":5992},{"id":5994,"name":6357,"basis":6358,"values":6359,"period":6360,"implication":6361,"references":6362},"新加坡 — WSH（一般规定）","第 2 条定义及附表一（First Schedule）","长期 PEL 10 ppm；短期 PEL 15 ppm","8 小时工作日 \u002F 每周 40 小时；15 分钟短期时段","请使用新加坡实际的 PEL 定义。新加坡只是一个示例，不能代替其他东南亚国家的法律。",[6363],{"id":6002,"label":6364,"url":6004},"Singapore WSH (General Provisions) Regulations（中译：新加坡《工作场所安全与健康（一般规定）条例》）",{"id":6006,"name":6366,"basis":6367,"values":6368,"period":6369,"implication":6370,"references":6371},"加拿大安大略省 — 第 833 号条例表","安大略省现行职业接触限值表，H₂S 行","TWA 10 ppm；STEL 15 ppm","按第 833 号条例的参考时段和工作场所要求执行","请确认适用的省级或联邦制度。不要把它标为全加拿大的限值。",[6372],{"id":6014,"label":6373,"url":6016},"Current occupational exposure limits for Ontario workplaces under Regulation 833（中译：安大略省第 833 号条例下工作场所的现行职业接触限值）",{"id":6018,"name":6375,"basis":6376,"values":6377,"period":6378,"implication":6379,"references":6380},"澳大利亚 — 全国 WES 参考","2025 年 11 月全国 WES 参考；请确认适用的联邦、州或领地法律及其生效日期","8 小时 TWA 10 ppm；15 分钟 STEL 15 ppm","8 小时和 15 分钟；在采用全国参考值之前，请确认所在司法管辖区是否已采纳及何时开始实施","2026 年 6 月 24 日的更新说明，H₂S 限值在 2026 年 12 月 1 日过渡时保持不变。本文不把拟议的 1\u002F5 ppm 方案视为已通过的法律。",[6381,6383],{"id":6026,"label":6382,"url":6028},"Safe Work Australia：工作场所接触标准（2025 年 11 月修订）",{"id":6030,"label":6384,"url":6032},"Safe Work Australia，2026 年 6 月 24 日：发布九种化学物质的决策影响声明",{"base":6034,"packet":6035,"arithmetic":6036,"worksheet":6037,"diagram":6038},[6387],{"label":6388,"url":289,"description":6389},"现有仪器的技术支持","准备请求时，请提供实际型号、固件、事件和现有记录。",{"firstAction":6391,"checks":6392,"requestTemplate":6405},"如果监测仪正在报警，请按照现场的报警响应程序处理。不要以 TWA 低为由忽视报警，或据此决定可以继续作业。下面的核查用于事件结束后复核读数。",[6393,6397,6401],{"title":6394,"action":6395,"outcome":6396},"把峰值与采样任务对应起来","记录气体、单位、峰值和时间戳。监测仪当时是由作业人员佩戴、在远程采样，还是正在通标准气？","远程样品描述的是采样点的空气，本身并不能代表作业人员呼吸带的接触情况。",{"title":6398,"action":6399,"outcome":6400},"确认 TWA 的计算时段和是否有重置","查阅型号说明和设置，确认平均时段。把报警时间与关机、重启、手动重置和模式切换记录进行对照。","如果计算时段或重置历史不明，不要把显示的 TWA 标为整班结果。",{"title":6402,"action":6403,"outcome":6404},"核查事件前后的测量数据","保留原始的事件导出文件和测量导出文件。记下软件版本和下载范围；如果无法导出，请保留带时间戳的截图。","如果缺少数据行，请按下面的核查项排查导出范围、记录压缩和存储覆盖。峰值无法补上缺失的浓度。","监测仪型号、序列号和固件：\n软件版本和所选下载范围：\n事件日期、时间和时区：\n气体、单位、记录的峰值和报警事件持续时间：\n显示的 TWA 及配置的计算时段（如已知）：\n关机、重启、手动重置或模式切换：\n采样任务和采样位置 \u002F 监测仪佩戴位置：\n可提供的原始事件文件和测量文件，或带时间戳的截图：\n\n请确认峰值和 TWA 各自覆盖的范围、缺失或压缩时段如何表示、适用哪些重置和保留规则，以及还需要哪些记录。",{"title":6407,"intro":6408,"sourceFile":6062,"periodMinutes":6063,"maximumMinuteMeanPpm":1246,"periodMeanPpm":6064,"bars":6409,"formula":6078,"scaleNote":6418,"boundary":6419,"downloadLabel":6420},"两个数字为什么会相差这么大？","假设八小时内每一分钟都有有效的平均值：其中一分钟为 12 ppm（百万分之一），其余 479 分钟均为零。",[6410,6414],{"id":6067,"button":6411,"label":6412,"value":6070,"explanation":6413},"看最高的那一分钟","最高 1 分钟平均值","保存的最高 1 分钟平均值为 12 ppm。它描述的是一分钟，并不能告诉您最高的瞬时浓度。",{"id":6073,"button":6415,"label":6416,"value":6076,"explanation":6417},"看 8 小时平均值","全部 480 分钟的平均值","全部 480 分钟都计入这个平均值。479 个零值分钟把平均值拉低到 0.025 ppm，而那个 12 ppm 的分钟仍然保留在记录中。","两根柱子使用相同的 0–12 ppm 刻度。平均值柱只有上方柱子的 1\u002F480，因此几乎看不见。","虚构的算术示意。这些是完整的 1 分钟平均值，不是传感器曲线，也不是真实检测仪的峰值字段。本示例不定义任何仪器的 TWA 算法，也不代表某个接触水平可以接受。","下载此示意图（SVG）",[6422,6428,6434],{"id":6084,"mechanism":6423,"example":6424,"action":6425,"boundary":6426,"referenceIds":6427},"下载范围受限","下载选项包括仅事件、最近一周、上次下载以来的记录，或完整日志。","记录所选的下载范围；如果覆盖该事件的测量日志仍然存在，请将其取回。扩大下载范围并不能证明已被覆盖的测量数据可以恢复。","示例来自所引用的手册和软件；请核查您仪器的选项。",[6090],{"id":6092,"mechanism":6429,"example":6430,"action":6431,"boundary":6432,"referenceIds":6433},"重复记录被压缩","同一手册介绍了每秒一次的状态记录，并对冗余记录进行压缩。","核查软件如何表示重复数值和经过的时间。仅有压缩，并不能证明测量数据丢失或浓度为零。不要把无法解释的空白改成零。","该手册并未规定导出中缺少的每一行都代表零。",[6090],{"id":6099,"mechanism":6435,"example":6436,"action":6437,"boundary":6438,"referenceIds":6439},"独立的循环存储","2024 年挪威的一项水与污水研究报告了 15 秒的记录间隔和 16 小时的循环存储。报警记录使用独立存储，因此可以提取到峰值，却没有对应的测量日志。","核查记录间隔、存储容量和下载延迟。询问事件记录和测量记录是否有不同的保留规则。循环存储在空间被重复使用时会覆盖较早的记录。","这是研究所用的设备和条件，不是逸云天的存储规格，也不是适用于所有检测仪的规则。",[6105],[6441,6443],{"id":6105,"label":6442,"url":6109},"研究：方法与设备",{"id":6090,"label":6444,"url":6112},"手册，第 14–15 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小时算术示例。",[6474,6476,6478,6480],{"file":6143,"purpose":6475},"请先阅读。定义单位和各数值的含义。时间戳采用协调世界时（UTC）。",{"file":6146,"purpose":6477},"包含二十个 1 分钟时段，编号 M01–M20。本页中的 NR 表示未提供测量值，不代表零。",{"file":6149,"purpose":6479},"包含一个报警事件，编号 E01，含开始时间、结束时间、记录的峰值和报警事件持续时间。",{"file":5948,"purpose":6481},"包含一个报告的 TWA，有意省略了计算细节。它是一份独立的摘要，不是根据测量 CSV 计算出的结果。",[6483,6484,6485,6486],"这份虚构记录覆盖 09:00–09:20 UTC。每个数值测量都定义为一个完整分钟的平均值。十八分钟有数值；09:04 至 09:06 之间的两分钟没有数值。","事件 E01 从 09:04:15 持续到 09:04:45 UTC，正好落在该缺口内。它报告的峰值为 12 ppm，报警持续时间为 30 秒。单独的摘要报告的 TWA 为 0.030 ppm。","0.030 ppm 这个数值是为本练习选定的；其计算时段、输入和重置历史都有意未作说明。这些文件采用通用格式，不是逸云天或其他制造商的导出格式。","请用下面的结论区分哪些是文件能证明的、哪些仍然未知。即使不做这个练习，也可以使用上面的核查项。","对 18 个有效分钟，覆盖时段平均值为 1.500 ppm·min ÷ 18 min = 0.0833 ppm。这不是完整的 20 分钟平均值。单独的 0.030 ppm TWA 仍然无法解释，因为其计算时段和输入均未说明。",[6489,6493,6497,6501,6505,6509,6513],{"topic":6490,"question":6491,"evidence":6492},"保存的数值与事件峰值","每个保存的数值代表什么：瞬时读数、时段平均值还是最大值？事件峰值是在哪个时段内记录的？在 MS104K-S2 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interference.",[],{"productIds":7138,"gasIds":7139,"industryIds":7140,"applicationIds":7141,"id":7142,"slug":7143,"type":6544,"status":3921,"language":18,"revision":7144,"issueDate":6546,"media":7145,"download":7149,"certificateIds":7153,"marketContent":7154,"sources":7159},[157],[],[],[],"resource-mic-200-uvir2-technical-summary-en","mic-200-uvir2-technical-summary-en","TS-20261008-740e027c",{"id":7146,"url":7147,"alt":7148,"width":6551,"height":6552,"mimeType":4039},"media-resource-mic-200-uvir2-technical-summary-en","\u002Fimages\u002Fresources\u002Ftechnical-summaries\u002Fmic-200-uvir2-technical-summary-en.jpg","MIC-200-UVIR2 English technical summary cover",{"id":7150,"url":7151,"alt":7152,"mimeType":4044},"file-resource-mic-200-uvir2-technical-summary-en","\u002Fdocuments\u002Ftechnical-summaries\u002Fmic-200-uvir2-technical-summary-en.pdf","MIC-200-UVIR2 English technical summary PDF",[],[7155],{"market":17,"locale":18,"publication":7156,"title":7157,"summary":7158},{"status":663,"indexable":3930},"MIC-200-UVIR2 English technical summary","A combined dual-infrared and ultraviolet flame detector for fast industrial fire detection and interference rejection.",[],{"productIds":7161,"gasIds":7162,"industryIds":7163,"applicationIds":7164,"id":7165,"slug":7166,"type":6544,"status":3921,"language":18,"revision":7167,"issueDate":6546,"media":7168,"download":7172,"certificateIds":7176,"marketContent":7177,"sources":7182},[161],[],[],[],"resource-mic-200-uvir3-technical-summary-en","mic-200-uvir3-technical-summary-en","TS-20261008-bf827cfe",{"id":7169,"url":7170,"alt":7171,"width":6551,"height":6552,"mimeType":4039},"media-resource-mic-200-uvir3-technical-summary-en","\u002Fimages\u002Fresources\u002Ftechnical-summaries\u002Fmic-200-uvir3-technical-summary-en.jpg","MIC-200-UVIR3 English technical summary cover",{"id":7173,"url":7174,"alt":7175,"mimeType":4044},"file-resource-mic-200-uvir3-technical-summary-en","\u002Fdocuments\u002Ftechnical-summaries\u002Fmic-200-uvir3-technical-summary-en.pdf","MIC-200-UVIR3 English technical summary PDF",[],[7178],{"market":17,"locale":18,"publication":7179,"title":7180,"summary":7181},{"status":663,"indexable":3930},"MIC-200-UVIR3 English technical summary","A combined triple-infrared and ultraviolet flame detector for complex high-risk industrial environments.",[],{"productIds":7184,"gasIds":7185,"industryIds":7186,"applicationIds":7187,"id":7188,"slug":7189,"type":6544,"status":3921,"language":18,"revision":7190,"issueDate":6546,"media":7191,"download":7195,"certificateIds":7199,"marketContent":7200,"sources":7205},[165],[],[],[],"resource-mic-200-uvir4-technical-summary-en","mic-200-uvir4-technical-summary-en","TS-20261008-af53a134",{"id":7192,"url":7193,"alt":7194,"width":6551,"height":6552,"mimeType":4039},"media-resource-mic-200-uvir4-technical-summary-en","\u002Fimages\u002Fresources\u002Ftechnical-summaries\u002Fmic-200-uvir4-technical-summary-en.jpg","MIC-200-UVIR4 English technical summary cover",{"id":7196,"url":7197,"alt":7198,"mimeType":4044},"file-resource-mic-200-uvir4-technical-summary-en","\u002Fdocuments\u002Ftechnical-summaries\u002Fmic-200-uvir4-technical-summary-en.pdf","MIC-200-UVIR4 English technical summary PDF",[],[7201],{"market":17,"locale":18,"publication":7202,"title":7203,"summary":7204},{"status":663,"indexable":3930},"MIC-200-UVIR4 English technical summary","A combined four-infrared and ultraviolet flame detector for demanding industrial fire-detection applications.",[],{"productIds":7207,"gasIds":7208,"industryIds":7209,"applicationIds":7210,"id":7211,"slug":7212,"type":6544,"status":3921,"language":18,"revision":7213,"issueDate":6546,"media":7214,"download":7218,"certificateIds":7222,"marketContent":7223,"sources":7228},[237],[],[],[],"resource-smart-cloud-monitoring-platform-technical-summary-en","smart-cloud-monitoring-platform-technical-summary-en","TS-20261008-bd26be38",{"id":7215,"url":7216,"alt":7217,"width":6551,"height":6552,"mimeType":4039},"media-resource-smart-cloud-monitoring-platform-technical-summary-en","\u002Fimages\u002Fresources\u002Ftechnical-summaries\u002Fsmart-cloud-monitoring-platform-technical-summary-en.jpg","Smart Cloud Monitoring Platform English technical summary cover",{"id":7219,"url":7220,"alt":7221,"mimeType":4044},"file-resource-smart-cloud-monitoring-platform-technical-summary-en","\u002Fdocuments\u002Ftechnical-summaries\u002Fsmart-cloud-monitoring-platform-technical-summary-en.pdf","Smart Cloud Monitoring Platform English technical summary PDF",[],[7224],{"market":17,"locale":18,"publication":7225,"title":7226,"summary":7227},{"status":663,"indexable":3930},"Smart Cloud Monitoring Platform English technical summary","Centralized monitoring software for real-time gas data, alarms, device status, trends, historical records and multi-site visibility.",[],{"productIds":7230,"gasIds":7231,"industryIds":7232,"applicationIds":7233,"id":7234,"slug":7235,"type":6544,"status":3921,"language":18,"revision":7236,"issueDate":6546,"media":7237,"download":7241,"certificateIds":7245,"marketContent":7246,"sources":7251},[137],[],[],[],"resource-mic-1000-ex-technical-summary-en","mic-1000-ex-technical-summary-en","TS-20261008-361c9d99",{"id":7238,"url":7239,"alt":7240,"width":6551,"height":6552,"mimeType":4039},"media-resource-mic-1000-ex-technical-summary-en","\u002Fimages\u002Fresources\u002Ftechnical-summaries\u002Fmic-1000-ex-technical-summary-en.jpg","MIC-1000-Ex English technical summary cover",{"id":7242,"url":7243,"alt":7244,"mimeType":4044},"file-resource-mic-1000-ex-technical-summary-en","\u002Fdocuments\u002Ftechnical-summaries\u002Fmic-1000-ex-technical-summary-en.pdf","MIC-1000-Ex English technical summary PDF",[],[7247],{"market":17,"locale":18,"publication":7248,"title":7249,"summary":7250},{"status":663,"indexable":3930},"MIC-1000-Ex English technical summary","An explosion-protected gas alarm controller with one 4–20 mA input as standard, expandable to eight, plus up to 128 RS485 detector inputs.",[],{"productIds":7253,"gasIds":7254,"industryIds":7255,"applicationIds":7256,"id":293,"slug":1053,"type":1048,"status":3921,"language":18,"issueDate":7257,"author":4178,"media":7258,"certificateIds":7265,"marketContent":7266,"sources":8633},[133,193,245],[1994,64,2014],[80],[37],"2026-09-05",{"id":7259,"url":7260,"alt":7261,"width":4183,"height":4184,"mimeType":705,"roles":7262,"localizedAlt":7263},"media-eranntex-wastewater-technical-guide-cover","\u002Fimages\u002Fresources\u002Feranntex-wastewater-gas-sampling-guide-cover.webp","Eranntex technical guide cover: wastewater gas sampling, with coiled sample tubing, a magnifying glass and a planning sheet.",[707,708],{"zh-CN":7264},"逸云天技术指南封面：污水气体采样，画面中有盘绕的采样管、放大镜和规划表。",[],[7267,7969],{"market":17,"locale":18,"publication":7268,"title":7269,"summary":7270,"updatedOn":7271,"body":7272,"faq":7944,"seo":7965,"mediaCaption":7968,"mediaLayout":5515},{"status":663,"indexable":10},"Wastewater H₂S Monitoring: Setting Up the Gas Sampling System for Humid Tank Air","Air drawn from a covered wastewater tank is humid, and water that condenses in the sample line dissolves ammonia and some H₂S, so the analyzer reads low. Remove the water at one controlled point, make sure filters pass the target gas, and check the whole path with calibration gas at the probe inlet.","2026-11-03",[7273,7308,7352,7425,7463,7543,7570,7676,7700,7759],{"id":7274,"heading":7275,"paragraphs":7276,"blocks":7278},"ww-short-answer","How should humid tank air be sampled for H₂S and ammonia?",[7277],"Take the water out at one controlled point, keep it from condensing anywhere else in the line, and prove with calibration gas that the target gas still reaches the analyzer. Air drawn from a covered wastewater tank is humid. If its water condenses in the sample line, it dissolves part of the H₂S and much more of the ammonia, and the analyzer reads low without showing a fault.",[7279,7282],{"kind":4203,"content":7280},[7281],{"text":7277},{"kind":4310,"ordered":3930,"items":7283},[7284,7291,7298,7301],[7285,7287,7290],{"text":7286},"Remove the water in a cooler with an automatic drain, or keep the line heated and dry the sample in a condenser. See ",{"text":7288,"href":7289},"how the water is removed","#ww-drying",{"text":4241},[7292,7294,7297],{"text":7293},"Make sure every filter in the path passes the target gas: one moisture filter took a 1,000 ppm ammonia reading to zero. See ",{"text":7295,"href":7296},"how to check the path","#ww-whole-path",{"text":4241},[7299],{"text":7300},"Apply calibration gas at the probe inlet, not only at the analyzer, to measure what the line removes.",[7302,7304,7307],{"text":7303},"Allow for the time the gas needs to travel the line, on top of the sensor's own response time. See ",{"text":7305,"href":7306},"line length and response time","#ww-line-response",{"text":4241},{"id":7309,"heading":7310,"paragraphs":7311,"blocks":7316},"ww-condensation","Why do H₂S and ammonia readings drop in a wet sample line?",[7312,7313,7314,7315],"Because the gas dissolves in the water that condenses in the line. In extractive sampling, a pump draws air from the tank through a sample line to an analyzer outside the tank. The instrument stays out of the wet air space above the liquid (the headspace) and can be serviced without opening the tank, as in both Eranntex projects described below. [S4] [S5] The reading then depends on what happens to the gas inside the line.","Humid air and liquid water are different problems. Relative humidity (%RH) says how close air is to holding all the water vapor it can at its temperature. The GTYQ-MIC-600 fixed detector is specified for 10–95 %RH, so humid air alone is within its range. [S9] Liquid water forms when air cools below its dew point, the temperature at which that air would reach 100 %RH. Warm, humid tank air, like the air above the anaerobic tank in Example 1, can cool below its dew point in a line that runs through colder surroundings, and part of its vapor then turns into liquid water (condensate) on the tube walls. [S4]","Both H₂S and ammonia dissolve in that water, ammonia far more readily. At 25 °C, a liter of water in equilibrium with the sample air holds about 1,500 times as much ammonia as a liter of that air, but only about 2.5 times as much H₂S. [S1] One milliliter of condensate can therefore hold the ammonia from about 1.5 liters of sample. Gas that dissolves in the line never reaches the sensor, so the instrument reads low. A low reading is the dangerous error, because the system still looks as if it is working.","Some detectors are instead built to sit in a duct or a flow cell in condensing air. Which areas of a plant need personal, fixed or extracted monitoring is covered on the water and wastewater industry page.",[7317,7326,7338,7345],{"kind":4203,"content":7318},[7319,7321,7322,7323,7324],{"text":7320},"Because the gas dissolves in the water that condenses in the line. In extractive sampling, a pump draws air from the tank through a sample line to an analyzer outside the tank. The instrument stays out of the wet air space above the liquid (the headspace) and can be serviced without opening the tank, as in both Eranntex projects described below. ",{"text":4356,"href":4357,"citation":10},{"text":4287},{"text":4452,"href":4453,"citation":10},{"text":7325}," The reading then depends on what happens to the gas inside the line.",{"kind":4203,"content":7327},[7328,7330,7332,7334,7335,7337],{"text":7329},"Humid air and liquid water are different problems. Relative humidity (%RH) says how close air is to holding all the water vapor it can at its temperature. The ",{"text":7331,"href":192},"GTYQ-MIC-600",{"text":7333}," fixed detector is specified for 10–95 %RH, so humid air alone is within its range. ",{"text":4658,"href":4659,"citation":10},{"text":7336}," Liquid water forms when air cools below its dew point, the temperature at which that air would reach 100 %RH. Warm, humid tank air, like the air above the anaerobic tank in Example 1, can cool below its dew point in a line that runs through colder surroundings, and part of its vapor then turns into liquid water (condensate) on the tube walls. ",{"text":4356,"href":4357,"citation":10},{"kind":4203,"content":7339},[7340,7342,7343],{"text":7341},"Both H₂S and ammonia dissolve in that water, ammonia far more readily. At 25 °C, a liter of water in equilibrium with the sample air holds about 1,500 times as much ammonia as a liter of that air, but only about 2.5 times as much H₂S. ",{"text":4208,"href":4209,"citation":10},{"text":7344}," One milliliter of condensate can therefore hold the ammonia from about 1.5 liters of sample. Gas that dissolves in the line never reaches the sensor, so the instrument reads low. A low reading is the dangerous error, because the system still looks as if it is working.",{"kind":4203,"content":7346},[7347,7349,7351],{"text":7348},"Some detectors are instead built to sit in a duct or a flow cell in condensing air. Which areas of a plant need personal, fixed or extracted monitoring is covered on the ",{"text":7350,"href":79},"water and wastewater industry page",{"text":4241},{"id":7353,"heading":7354,"paragraphs":7355,"blocks":7358},"ww-drying","How is the water removed without losing the gas?",[7356,7357],"At one controlled point, chosen from the sample, rather than wherever the line happens to be cold. Water has to come out before the sample reaches the detector: a sample near saturation is above the MIC-600's 95 %RH limit, and liquid carried with the sample can damage the analyzer. [S9] Ahead of that point, the sample is kept above its dew point. The US EPA reference method for instrumental gas analyzers requires this of every component except the sample conditioning, and asks for minimal contact between condensate and the sample gas. [S12]","Whichever stage is used, its filters have to pass the target gas. The whole-path gas check shows whether they do.",[7359,7367,7375,7417],{"kind":4203,"content":7360},[7361,7363,7364,7366],{"text":7362},"At one controlled point, chosen from the sample, rather than wherever the line happens to be cold. Water has to come out before the sample reaches the detector: a sample near saturation is above the MIC-600's 95 %RH limit, and liquid carried with the sample can damage the analyzer. ",{"text":4658,"href":4659,"citation":10},{"text":7365}," Ahead of that point, the sample is kept above its dew point. The US EPA reference method for instrumental gas analyzers requires this of every component except the sample conditioning, and asks for minimal contact between condensate and the sample gas. ",{"text":4695,"href":4696,"citation":10},{"kind":4950,"items":7368},[7369],{"url":7370,"alt":7371,"caption":7372,"width":7373,"height":7374},"\u002Fimages\u002Fresources\u002Fwastewater-sample-path.svg","Isometric drawing of a covered tank with a sampling probe, a heat-traced sample line on two pipe stands, and an open cabinet containing a cooler, a gas-water separator with drain pump and drain valve, a sample pump, a flowmeter and a gas detector.","Fig. 1 · From left: a covered tank with its sampling probe; a heat-traced sample line on two pipe stands; an open cabinet with a cooler, a gas-water separator (highlighted) with a peristaltic drain pump and solenoid drain valve below it, a sample pump, a flowmeter and the gas detector; the exhaust outlet on the right. Conceptual arrangement of documented conditioning stages, not a product drawing or installation layout.",1080,560,{"kind":4310,"ordered":3930,"items":7376},[7377,7390,7409],[7378,7380,7382,7384,7386,7387,7389],{"text":7379,"strong":10},"Cooling stage with automatic drain.",{"text":7381}," For the warm, humid air above the anaerobic tank in Example 1, the ",{"text":7383,"href":244},"TH-2000-C",{"text":7385}," conditioning system cooled the sample in a thermoelectric (solid-state) cooler inside the cabinet so the water condensed there, drained it automatically, and passed the dried sample to a GTYQ-MIC-600 in the same cabinet. ",{"text":4356,"href":4357,"citation":10},{"text":7388}," The TH-2000-C is documented for high-humidity, low-dust samples in this way. ",{"text":4593,"href":4594,"citation":10},[7391,7393,7395,7396,7398,7399,7401,7403,7405,7406,7408],{"text":7392,"strong":10},"Heated line and two-stage condenser.",{"text":7394}," Where low concentrations of water-soluble gases have to be measured accurately, the sample line is heat-traced, that is, wrapped with an electric heating cable, so water cannot condense in it. ",{"text":4695,"href":4696,"citation":10},{"text":7397}," The sample is then dried in a two-stage condenser that holds its dew point at 4–5 °C. ",{"text":4289,"href":4290,"citation":10},{"text":7400}," On the ",{"text":7402,"href":132},"DOAS-3000",{"text":7404}," analyzer, this arrangement exists to limit losses of water-soluble components. ",{"text":4335,"href":4336,"citation":10},{"text":7407}," Where an outdoor line can freeze, it is heat-traced for that reason as well. ",{"text":4593,"href":4594,"citation":10},[7410,7412,7414,7415,7416],{"text":7411,"strong":10},"Simple pretreatment.",{"text":7413}," In Eranntex's documented pretreatment options, simple uncooled pretreatment is matched to ambient-temperature, low-humidity, dust-free samples; humid samples are dried in a cooling stage. ",{"text":4593,"href":4594,"citation":10},{"text":4287},{"text":4658,"href":4659,"citation":10},{"kind":4203,"content":7418},[7419,7421,7423],{"text":7420},"Whichever stage is used, its filters have to pass the target gas. The ",{"text":7422,"href":7296},"whole-path gas check",{"text":7424}," shows whether they do.",{"id":7426,"heading":7427,"paragraphs":7428,"blocks":7432},"ww-whole-path","How do you know the sample path is not absorbing the gas?",[7429,7430,7431],"Apply calibration gas, a cylinder gas of known concentration, at the probe inlet and compare the reading with the same gas applied directly at the analyzer. The difference is what the line, filters and conditioning remove. US EPA Method 7E, a US stack-testing method, calls this difference system bias; for the system check, the gas goes in at the probe, upstream of the filter and all sample conditioning. [S12]","Eranntex ran this check before shipment on an ammonia treatment project: the analyzer read 1,000 ppm ammonia calibration gas correctly on its own but read zero with the sample conditioning fitted. The moisture filter was taking up the ammonia. It was removed, and the calibration gas then reached the analyzer. [S6] Filter material matters: in a laboratory study, paper and fuel filters took up ammonia, most strongly when first exposed, while PTFE (Teflon) filters took up almost none. [S13] For any path that must deliver ammonia, test the assembled path with ammonia before relying on it.","After installation, repeat the check at the probe inlet. A bump test, a short exposure to test gas, shows that gas gets through and the alarm works, but not how much is lost, and a calibration done only at the analyzer port cannot show that loss either. OSHA's guidance on direct-reading monitors, a US advisory bulletin, states that a bump test does not measure accuracy and counts sample tubing among the links in the calibration chain. [S11] The differences between a bump test, a calibration check and a full calibration are explained in the personal gas monitoring guide. The water and wastewater page describes an HSE investigation in which a complete sampling arrangement responded far more slowly to a flammable vapor than the detector alone.",[7433,7438,7448],{"kind":4203,"content":7434},[7435,7437],{"text":7436},"Apply calibration gas, a cylinder gas of known concentration, at the probe inlet and compare the reading with the same gas applied directly at the analyzer. The difference is what the line, filters and conditioning remove. US EPA Method 7E, a US stack-testing method, calls this difference system bias; for the system check, the gas goes in at the probe, upstream of the filter and all sample conditioning. ",{"text":4695,"href":4696,"citation":10},{"kind":4203,"content":7439},[7440,7442,7443,7445,7446],{"text":7441},"Eranntex ran this check before shipment on an ammonia treatment project: the analyzer read 1,000 ppm ammonia calibration gas correctly on its own but read zero with the sample conditioning fitted. The moisture filter was taking up the ammonia. It was removed, and the calibration gas then reached the analyzer. ",{"text":4461,"href":4462,"citation":10},{"text":7444}," Filter material matters: in a laboratory study, paper and fuel filters took up ammonia, most strongly when first exposed, while PTFE (Teflon) filters took up almost none. ",{"text":4699,"href":4700,"citation":10},{"text":7447}," For any path that must deliver ammonia, test the assembled path with ammonia before relying on it.",{"kind":4203,"content":7449},[7450,7452,7453,7455,7456,7458,7461],{"text":7451},"After installation, repeat the check at the probe inlet. A bump test, a short exposure to test gas, shows that gas gets through and the alarm works, but not how much is lost, and a calibration done only at the analyzer port cannot show that loss either. OSHA's guidance on direct-reading monitors, a US advisory bulletin, states that a bump test does not measure accuracy and counts sample tubing among the links in the calibration chain. ",{"text":4671,"href":4672,"citation":10},{"text":7454}," The differences between a bump test, a calibration check and a full calibration are explained in the ",{"text":5142,"href":48},{"text":7457},". The ",{"text":7459,"href":7460},"water and wastewater page","https:\u002F\u002Fwww.eranntex.com\u002Findustries\u002Fwater-and-wastewater\u002F#ww01-05",{"text":7462}," describes an HSE investigation in which a complete sampling arrangement responded far more slowly to a flammable vapor than the detector alone.",{"id":7464,"heading":7465,"paragraphs":7466,"blocks":7472},"ww-example-anaerobic","Example 1: alarms for H₂S, methane and three other gases above an anaerobic tank",[7467,7468,7469,7470,7471],"Above a sealed anaerobic wastewater tank, the monitoring task was alarms for five gases. Anaerobic treatment warmed the water, so the air above it was hot and heavy with vapor. The operator wanted an alarm whenever H₂S, methane (CH₄), carbon monoxide (CO), carbon dioxide (CO₂) or oxygen (O₂) moved outside its limit. An alarm would send staff to check whether the ventilation had failed. [S4]","Eranntex supplied a TH-2000-C sample-conditioning system with a GTYQ-MIC-600 five-gas detector, in an outdoor rainproof cabinet. The specified ranges were:","A brushless DC pump drew the tank air over a 20 m sampling distance, and a 10 m sample line was supplied with the system. Inside the cabinet, a thermoelectric cooler condensed the water out, a filter removed remaining moisture and dust, and a peristaltic pump (a pump that squeezes a tube to move liquid) and a solenoid valve drained the condensate automatically. The 7-inch touchscreen showed all five readings. [S4]","The site's requirements were not fully stated at the first enquiry. When the specification was reviewed, the site confirmed a hazardous-area requirement at the mounting location, and the cabinet specification was updated before shipment. The alarm points were set at the factory, an Eranntex engineer guided the installation and wiring by video, and the system went into service. [S4]","These ranges serve alarms above a process tank. They say nothing about exposure limits for people working at the tank, who still need personal monitors.",[7473,7478,7488,7530,7535,7540],{"kind":4203,"content":7474},[7475,7477],{"text":7476},"Above a sealed anaerobic wastewater tank, the monitoring task was alarms for five gases. Anaerobic treatment warmed the water, so the air above it was hot and heavy with vapor. The operator wanted an alarm whenever H₂S, methane (CH₄), carbon monoxide (CO), carbon dioxide (CO₂) or oxygen (O₂) moved outside its limit. An alarm would send staff to check whether the ventilation had failed. ",{"text":4356,"href":4357,"citation":10},{"kind":4203,"content":7479},[7480,7482,7483,7485,7486],{"text":7481},"Eranntex supplied a ",{"text":7383,"href":244},{"text":7484}," sample-conditioning system with a ",{"text":7331,"href":192},{"text":7487}," five-gas detector, in an outdoor rainproof cabinet. The specified ranges were:",{"kind":4213,"caption":7489,"headers":7490,"rows":7496},"Specified ranges, anaerobic tank alarm system",[7491,7494],[7492],{"text":7493},"Gas",[7495],{"text":4477},[7497,7503,7510,7517,7523],{"cells":7498},[7499,7501],[7500],{"text":2361},[7502],{"text":4389},{"cells":7504},[7505,7507],[7506],{"text":2476},[7508],{"text":7509},"0–5 %Vol",{"cells":7511},[7512,7514],[7513],{"text":2460},[7515],{"text":7516},"0–1,000 ppm",{"cells":7518},[7519,7521],[7520],{"text":2485},[7522],{"text":4870},{"cells":7524},[7525,7527],[7526],{"text":2468},[7528],{"text":7529},"0–30 %Vol",{"kind":4203,"content":7531},[7532,7534],{"text":7533},"A brushless DC pump drew the tank air over a 20 m sampling distance, and a 10 m sample line was supplied with the system. Inside the cabinet, a thermoelectric cooler condensed the water out, a filter removed remaining moisture and dust, and a peristaltic pump (a pump that squeezes a tube to move liquid) and a solenoid valve drained the condensate automatically. The 7-inch touchscreen showed all five readings. ",{"text":4356,"href":4357,"citation":10},{"kind":4203,"content":7536},[7537,7539],{"text":7538},"The site's requirements were not fully stated at the first enquiry. When the specification was reviewed, the site confirmed a hazardous-area requirement at the mounting location, and the cabinet specification was updated before shipment. The alarm points were set at the factory, an Eranntex engineer guided the installation and wiring by video, and the system went into service. ",{"text":4356,"href":4357,"citation":10},{"kind":4203,"content":7541},[7542],{"text":7471},{"id":7544,"heading":7545,"paragraphs":7546,"blocks":7551},"ww-example-storage","Example 2: ammonia and H₂S at 0.01 ppm to measure treatment performance",[7547,7548,7549,7550],"At a covered sewage storage tank, the measurement was for treatment performance, not alarms. The customer had built equipment to remove ammonia and H₂S from the air above the tank and needed data showing how well it worked, with readings resolved to 0.01 ppm. The air was at ambient temperature and atmospheric pressure, humid and free of dust. [S5]","The configuration Eranntex specified drew air from the tank's air duct through a 10 m hose to a pumped online monitor in an outdoor 304 stainless-steel cabinet rated IP67. Both gases were measured with electrochemical sensors on 0–25 ppm ranges at 0.01 ppm resolution, the ammonia sensor was chosen to resist interference from H₂S, and temperature was logged alongside. A pretreatment stage removed water vapor ahead of the sensors. [S5]","An alarm on a 0–100 ppm H₂S range needs reliable readings well above zero. A treatment-performance measurement at 0.01 ppm needs the path to pass very low concentrations without loss.","Measuring both sides of a treatment unit means two measuring points with different requirements. On an industrial ammonia treatment project, the inlet sample was hot (75 °C), under negative pressure (3.5 kPa) and specified on a 0–15,000 mg\u002FNm³ range (milligrams per normal cubic meter), so it was specified with cooling and a tunable diode laser absorption spectroscopy (TDLAS) analyzer, an optical method chosen here for the high concentration. The outlet sample was at ambient temperature on a 0–20 mg\u002FNm³ range, where an electrochemical sensor was specified. [S6]",[7552,7557,7562,7565],{"kind":4203,"content":7553},[7554,7556],{"text":7555},"At a covered sewage storage tank, the measurement was for treatment performance, not alarms. The customer had built equipment to remove ammonia and H₂S from the air above the tank and needed data showing how well it worked, with readings resolved to 0.01 ppm. The air was at ambient temperature and atmospheric pressure, humid and free of dust. ",{"text":4452,"href":4453,"citation":10},{"kind":4203,"content":7558},[7559,7561],{"text":7560},"The configuration Eranntex specified drew air from the tank's air duct through a 10 m hose to a pumped online monitor in an outdoor 304 stainless-steel cabinet rated IP67. Both gases were measured with electrochemical sensors on 0–25 ppm ranges at 0.01 ppm resolution, the ammonia sensor was chosen to resist interference from H₂S, and temperature was logged alongside. A pretreatment stage removed water vapor ahead of the sensors. ",{"text":4452,"href":4453,"citation":10},{"kind":4203,"content":7563},[7564],{"text":7549},{"kind":4203,"content":7566},[7567,7569],{"text":7568},"Measuring both sides of a treatment unit means two measuring points with different requirements. On an industrial ammonia treatment project, the inlet sample was hot (75 °C), under negative pressure (3.5 kPa) and specified on a 0–15,000 mg\u002FNm³ range (milligrams per normal cubic meter), so it was specified with cooling and a tunable diode laser absorption spectroscopy (TDLAS) analyzer, an optical method chosen here for the high concentration. The outlet sample was at ambient temperature on a 0–20 mg\u002FNm³ range, where an electrochemical sensor was specified. ",{"text":4461,"href":4462,"citation":10},{"id":7571,"heading":7572,"paragraphs":7573,"blocks":7575},"ww-conditions","Which conditions at the sampling point change the system?",[7574],"High temperature, a near-saturated or wet sample, dust, pressure or suction, and interfering gases each add a component to the sample path. A standard detector configuration is meant for open air with a simple gas background, so when gas is drawn from a wastewater pipe or a closed tank, the Eranntex Technical Team first reviews these conditions. [S7]",[7576,7581],{"kind":4203,"content":7577},[7578,7580],{"text":7579},"High temperature, a near-saturated or wet sample, dust, pressure or suction, and interfering gases each add a component to the sample path. A standard detector configuration is meant for open air with a simple gas background, so when gas is drawn from a wastewater pipe or a closed tank, the Eranntex Technical Team first reviews these conditions. ",{"text":4465,"href":4466,"citation":10},{"kind":4213,"caption":7582,"headers":7583,"rows":7590},"Sampling-point conditions, what they add to the path, and documented Eranntex options",[7584,7587],[7585],{"text":7586},"Condition at the sampling point",[7588],{"text":7589},"What it adds, and documented Eranntex options",[7591,7608,7627,7644,7659],{"cells":7592},[7593,7596],[7594],{"text":7595},"High sample temperature",[7597,7599,7601,7602,7603,7605,7607],{"text":7598,"strong":10},"Adds:",{"text":7600}," a cooling sampling handle or cooling stage. ",{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":7604,"strong":10},"Documented:",{"text":7606}," TH-2000-C sample temperature −40 to 600 °C standard, up to 1,300 °C optional; its −40 to 70 °C figure is the cabinet's operating range, not the sample's. ",{"text":4593,"href":4594,"citation":10},{"cells":7609},[7610,7613],[7611],{"text":7612},"Sample near saturation or carrying liquid",[7614,7615,7617,7618,7619,7620,7622,7623,7624,7625,7626],{"text":7598,"strong":10},{"text":7616}," moisture removal ahead of the detector. ",{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":7604,"strong":10},{"text":7621}," a cooling stage with automatic drain (TH-2000-C), or a heat-traced line with a two-stage condenser at a 4–5 °C dew point (DOAS-3000); the MIC-600 is specified for 10–95 %RH. ",{"text":4289,"href":4290,"citation":10},{"text":4287},{"text":4593,"href":4594,"citation":10},{"text":4287},{"text":4658,"href":4659,"citation":10},{"cells":7628},[7629,7632],[7630],{"text":7631},"Dust",[7633,7634,7636,7637,7638,7639,7641,7642,7643],{"text":7598,"strong":10},{"text":7635}," dust filtration so the path does not clog. ",{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":7604,"strong":10},{"text":7640}," TH-2000-C adds a gas-cleaning and backflush unit for dusty samples; MIC-600 pretreatment options come in three grades: ambient, low-humidity and dust-free; hot and humid with little dust; hot, humid and dusty. ",{"text":4593,"href":4594,"citation":10},{"text":4287},{"text":4658,"href":4659,"citation":10},{"cells":7645},[7646,7649],[7647],{"text":7648},"Positive pressure or suction",[7650,7651,7653,7654,7655,7656,7658],{"text":7598,"strong":10},{"text":7652}," a pressure-reducing valve and flowmeter for positive pressure, or a higher-capacity sample pump for suction. ",{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":7604,"strong":10},{"text":7657}," TH-2000-C is documented for sampling points under positive or negative pressure. ",{"text":4593,"href":4594,"citation":10},{"cells":7660},[7661,7664],[7662],{"text":7663},"Interfering, corrosive or acid gases in the background",[7665,7666,7668,7669,7670,7671,7673,7674,7675],{"text":7598,"strong":10},{"text":7667}," a sensing principle chosen for the gas mixture, such as high-accuracy infrared or a photoionization detector (PID). ",{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":7604,"strong":10},{"text":7672}," Example 2 used an ammonia sensor chosen to resist H₂S; the high-concentration ammonia inlet was specified with TDLAS. ",{"text":4452,"href":4453,"citation":10},{"text":4287},{"text":4461,"href":4462,"citation":10},{"id":7677,"heading":7678,"paragraphs":7679,"blocks":7683},"ww-line-response","How long does the gas take to reach the analyzer?",[7680,7681,7682],"Roughly the line's internal volume divided by the sample flow, plus the sensor's own response time. For example, a 4 mm bore line holds about 0.25 L per 20 m, so at 2 L\u002Fmin the gas takes about 8 seconds to cover 20 m and about 26 seconds to cover 70 m. The sensor's response comes on top: Eranntex lists a T90 (the time to reach 90% of the final reading) of up to 30 s for its H₂S and ammonia sensors and up to 10 s for methane. [S10]","Conditioning stages add volume, and adsorption or condensate can slow the response much further, so the response that matters is the one measured with gas applied at the sample inlet after installation. US EPA Method 7E defines response time the same way, from a change in concentration at the sampling point. [S12] The TH-2000-C samples over 30–40 m as standard; an optional jet or vacuum pump extends this beyond 70 m. Sample flow is 2 L\u002Fmin as standard, with 4 L\u002Fmin optional. [S8]","Put the cabinet as close to the tank as the site allows. The measured sample also has to go somewhere afterwards; with H₂S in it, the outlet needs a safe discharge point.",[7684,7689,7697],{"kind":4203,"content":7685},[7686,7688],{"text":7687},"Roughly the line's internal volume divided by the sample flow, plus the sensor's own response time. For example, a 4 mm bore line holds about 0.25 L per 20 m, so at 2 L\u002Fmin the gas takes about 8 seconds to cover 20 m and about 26 seconds to cover 70 m. The sensor's response comes on top: Eranntex lists a T90 (the time to reach 90% of the final reading) of up to 30 s for its H₂S and ammonia sensors and up to 10 s for methane. ",{"text":4667,"href":4668,"citation":10},{"kind":4203,"content":7690},[7691,7693,7694,7696],{"text":7692},"Conditioning stages add volume, and adsorption or condensate can slow the response much further, so the response that matters is the one measured with gas applied at the sample inlet after installation. US EPA Method 7E defines response time the same way, from a change in concentration at the sampling point. ",{"text":4695,"href":4696,"citation":10},{"text":7695}," The TH-2000-C samples over 30–40 m as standard; an optional jet or vacuum pump extends this beyond 70 m. Sample flow is 2 L\u002Fmin as standard, with 4 L\u002Fmin optional. ",{"text":4593,"href":4594,"citation":10},{"kind":4203,"content":7698},[7699],{"text":7682},{"id":7701,"heading":7702,"paragraphs":7703,"blocks":7706,"links":7742},"ww-enquiry","What should you send with an enquiry?",[7704,7705],"The gases, the conditions at the sampling point and the route of the line; a model does not need to be chosen first.","Certificate coverage for a hazardous-area installation depends on the model and configuration. Our sales engineers confirm it for the configuration you specify. The quotation checklist lists general project details.",[7707,7710,7734],{"kind":4203,"content":7708},[7709],{"text":7704},{"kind":4310,"ordered":3930,"items":7711},[7712,7715,7718,7721,7724,7727,7731],[7713],{"text":7714},"The gases and ranges, and whether the measurement is for an alarm or for process or treatment-performance data.",[7716],{"text":7717},"The tank or duct, and whether the sampling point is under suction or pressure.",[7719],{"text":7720},"The sample temperature, its moisture, and the coldest place the line will pass.",[7722],{"text":7723},"Dust, grease, foam or liquid carry-over at the sampling point, and any other gases present.",[7725],{"text":7726},"The line length and route, and where the measured sample can be discharged.",[7728,7730],{"text":7729},"Indoor or outdoor installation, available power, and the signal your control system expects. TH-2000-C provides 4–20 mA, RS485 and passive contacts. ",{"text":4593,"href":4594,"citation":10},[7732],{"text":7733},"The country, and any hazardous-area classification at the cabinet location.",{"kind":4203,"content":7735},[7736,7738,7740],{"text":7737},"Certificate coverage for a hazardous-area installation depends on the model and configuration. Our sales engineers confirm it for the configuration you specify. The ",{"text":7739,"href":266},"quotation checklist",{"text":7741}," lists general project details.",[7743,7751,7755],{"id":7744,"label":7745,"target":7746},"ww-rfq","Discuss a wastewater tank monitoring requirement",{"kind":5585,"path":300,"query":7747},{"type":7748,"context":7749,"gasRequirements":7750,"source":292},"technical_enquiry","Wastewater tank sample path","Hydrogen sulfide (H2S), ammonia (NH3)",{"id":7752,"label":7753,"target":7754},"ww-industry","Review wastewater monitoring tasks",{"kind":5585,"path":79},{"id":7756,"label":7757,"target":7758},"ww-area","Review fixed and area monitoring tasks",{"kind":5585,"path":35},{"id":5267,"heading":5268,"paragraphs":7760,"blocks":7762},[7761],"Bracketed numbers in the text link to these sources. Project configurations and the factory test record on this page come from Eranntex Technical Team project records. Product data comes from Eranntex product documentation for the TH-2000-C, GTYQ-MIC-600 and DOAS-3000.",[7763,7766],{"kind":4203,"content":7764},[7765],{"text":7761},{"kind":4213,"caption":5276,"headers":7767,"rows":7774},[7768,7770,7772],[7769],{"text":5280},[7771],{"text":5283},[7773],{"text":5286},[7775,7798,7808,7819,7829,7839,7849,7859,7877,7890,7901,7914,7929],{"id":5289,"cells":7776},[7777,7779,7795],[7778],{"text":5293},[7780,7782,7785,7787,7789,7790,7793],{"text":7781},"R. Sander, ",{"text":7783,"href":7784},"Compilation of Henry's law constants (version 5.0.0) for water as solvent","https:\u002F\u002Fdoi.org\u002F10.5194\u002Facp-23-10901-2023",{"text":7786},", Atmospheric Chemistry and Physics 23, 10901–12440 (2023); entries for ",{"text":2491,"href":7788},"https:\u002F\u002Fwww.henrys-law.org\u002Fhenry\u002Fcasrn\u002F7664-41-7",{"text":5261},{"text":7791,"href":7792},"hydrogen sulfide","https:\u002F\u002Fwww.henrys-law.org\u002Fhenry\u002Fcasrn\u002F7783-06-4",{"text":7794},", retrieved 3 November 2026",[7796],{"text":7797},"Henry's law solubility at 25 °C: ammonia 0.59 and H₂S 1.0 × 10⁻³ mol\u002F(m³·Pa). Multiplied by RT, these give the water-to-air ratios in the text, about 1,460 and 2.5.",{"id":5302,"cells":7799},[7800,7802,7805],[7801],{"text":5306},[7803],{"text":7804},"Eranntex DOAS-3000 product documentation: sample conditioning description",[7806],{"text":7807},"Heat-traced sample line and two-stage condenser at a 4–5 °C dew point.",{"id":5315,"cells":7809},[7810,7812,7816],[7811],{"text":5319},[7813],{"text":7814,"href":7815},"Eranntex DOAS-3000 product page","https:\u002F\u002Fwww.eranntex.com\u002Fproducts\u002Fdoas-3000\u002F",[7817],{"text":7818},"Heated transport and two-stage condensation to limit losses of water-soluble components.",{"id":5334,"cells":7820},[7821,7823,7826],[7822],{"text":5338},[7824],{"text":7825},"Eranntex project record: five-gas monitoring system above an anaerobic wastewater tank",[7827],{"text":7828},"Example 1 conditions, configuration, ranges and commissioning; extractive layout.",{"id":5346,"cells":7830},[7831,7833,7836],[7832],{"text":5350},[7834],{"text":7835},"Eranntex configuration record: ammonia and H₂S monitoring above a covered sewage storage tank",[7837],{"text":7838},"Example 2 conditions and configuration; extractive layout.",{"id":5359,"cells":7840},[7841,7843,7846],[7842],{"text":5363},[7844],{"text":7845},"Eranntex project record: ammonia monitoring at the inlet and outlet of a treatment unit, including the pre-shipment gas test",[7847],{"text":7848},"Inlet and outlet specification; filter adsorption found in the pre-shipment test.",{"id":5372,"cells":7850},[7851,7853,7856],[7852],{"text":5376},[7854],{"text":7855},"Eranntex Technical Team note on sampling from pipes and closed spaces",[7857],{"text":7858},"Conditions that add components to the sample path.",{"id":5385,"cells":7860},[7861,7863,7874],[7862],{"text":5389},[7864,7866,7869,7871],{"text":7865},"Eranntex product specification table, online monitoring systems; ",{"text":7867,"href":7868},"TH-2000-C product page","https:\u002F\u002Fwww.eranntex.com\u002Fproducts\u002Fth-2000-c\u002F",{"text":7870},"; ",{"text":7872,"href":7873},"Oil & Gas industry page","https:\u002F\u002Fwww.eranntex.com\u002Findustries\u002Foil-and-gas\u002F",[7875],{"text":7876},"TH-2000-C sample temperature, distance, flow, pressure, outputs, application range and dust option; heat tracing of lines that can freeze.",{"id":5398,"cells":7878},[7879,7881,7887],[7880],{"text":5402},[7882,7884],{"text":7883},"Eranntex product specification table, fixed detectors; ",{"text":7885,"href":7886},"GTYQ-MIC-600 product page","https:\u002F\u002Fwww.eranntex.com\u002Fproducts\u002Fmic-600\u002F",[7888],{"text":7889},"MIC-600 operating humidity, sampling options and pretreatment grades.",{"id":5411,"cells":7891},[7892,7894,7898],[7893],{"text":5415},[7895,7897],{"text":7896},"Eranntex product specification table, sensor options; ",{"text":7885,"href":7886},[7899],{"text":7900},"Sensor T90 for H₂S, ammonia and methane.",{"id":5424,"cells":7902},[7903,7905,7911],[7904],{"text":5428},[7906,7909],{"text":7907,"href":7908},"OSHA Safety and Health Information Bulletin: Calibrating and Testing Direct-Reading Monitors","https:\u002F\u002Fwww.osha.gov\u002Fpublications\u002Fshib093013",{"text":7910},", SHIB 11-26-2024 (US advisory guidance)",[7912],{"text":7913},"A bump test does not measure accuracy; sample tubing is a link in the calibration chain.",{"id":5437,"cells":7915},[7916,7918,7926],[7917],{"text":5441},[7919,7921,7924],{"text":7920},"US EPA ",{"text":7922,"href":7923},"Method 7E","https:\u002F\u002Fwww.ecfr.gov\u002Fcurrent\u002Ftitle-40\u002Fchapter-I\u002Fsubchapter-C\u002Fpart-60\u002Fappendix-Appendix%20A-4%20to%20Part%2060",{"text":7925},", 40 CFR Part 60, Appendix A-4, sections 3 and 6.1 (US reference method for stack testing with instrumental analyzers)",[7927],{"text":7928},"System calibration at the probe, system bias and response time definitions; components other than sample conditioning kept above the moisture dew point; minimal contact between condensate and sample gas.",{"id":5450,"cells":7930},[7931,7933,7941],[7932],{"text":5454},[7934,7936,7939],{"text":7935},"Z. Zhu, H. Xin, H. Li, R. T. Burns, H. Dong, ",{"text":7937,"href":7938},"Assessment of in-line dust filter type and condition on ammonia adsorption","https:\u002F\u002Fagris.fao.org\u002Fsearch\u002Fen\u002Frecords\u002F65df338b4c5aef494fe0c901",{"text":7940},", Transactions of the ASABE 50(5), 1823–1830 (2007)",[7942],{"text":7943},"Ammonia taken up by paper and fuel filters, highest at first exposure; negligible uptake by PTFE filters.",[7945,7949,7953,7957,7961],{"id":7946,"question":7947,"answer":7948},"ww-faq-humidity","Can a gas detector handle humid air from a wastewater tank?","Humid air, yes, within the detector's rating; liquid water, no. The GTYQ-MIC-600 is specified for 10–95 %RH. Tank air that cools below its dew point in the sample line leaves liquid water, which should not reach the analyzer and which dissolves ammonia and, to a lesser degree, H₂S. The sample is therefore kept above its dew point up to one controlled drying stage, as US EPA Method 7E requires for every component except the sample conditioning.",{"id":7950,"question":7951,"answer":7952},"ww-faq-heated-line","Do I need a heated sample line for H₂S monitoring?","Not always. What matters is that water does not condense before the point where it is removed. A heated line ensures that where the line runs colder than the sample's dew point, and it is used where low concentrations of water-soluble gases must be measured with little loss, or where an outdoor line can freeze. The documented system in the anaerobic tank example removed the water in a cooling stage inside its cabinet, and its specification lists no line heating.",{"id":7954,"question":7955,"answer":7956},"ww-faq-ammonia-zero","Why does an ammonia analyzer read low or zero through a sample line?","Because ammonia dissolves in condensate and is taken up by some filter materials. At 25 °C, water in equilibrium with the sample holds about 1,500 times as much ammonia per liter as the air, according to Henry's law constants (Sander, 2023). In a laboratory study, paper and fuel filters took up ammonia while PTFE filters took up almost none (Zhu et al., 2007). On one Eranntex system, a moisture filter brought a 1,000 ppm ammonia calibration gas reading to zero until it was removed. Apply ammonia calibration gas at the probe inlet to find the loss.",{"id":7958,"question":7959,"answer":7960},"ww-faq-bump-test","Is a bump test enough for an extractive gas monitor?","No. A bump test shows that the sensor responds and the alarm works; OSHA guidance notes that it does not measure accuracy. It also cannot show how much gas the sample line removes. For that, compare the reading of calibration gas applied at the probe inlet with the same gas applied directly at the analyzer. US EPA Method 7E calls this difference system bias.",{"id":7962,"question":7963,"answer":7964},"ww-faq-travel-time","How long does gas take to travel through a sample line?","At least the internal volume of the line divided by the sample flow. A 4 mm bore line at 2 L\u002Fmin takes about 8 seconds for 20 m and about 26 seconds for 70 m. The sensor's own T90 comes on top, up to 30 seconds for Eranntex H₂S and ammonia sensors, and conditioning stages or adsorption add more. Measure the real response by applying gas at the probe inlet after installation.",{"title":7966,"description":7967},"Wastewater Gas Sampling Systems for Humid H₂S and NH₃","Water condensing in a sample line lowers H₂S and ammonia readings. Where to remove it, how to check the path with gas, and two Eranntex tank projects.","Conceptual illustration of sample-path review, not an installation drawing or a product configuration.",{"updatedOn":7271,"body":7970,"faq":8611,"mediaCaption":8627,"mediaLayout":5515,"market":315,"locale":316,"publication":8628,"seo":8629,"title":1056,"summary":8632},[7971,8003,8045,8112,8148,8225,8251,8356,8379,8433],{"id":7274,"heading":7972,"paragraphs":7973,"blocks":7975},"潮湿的池内空气应如何采样，才能测准 H₂S 和氨？",[7974],"只在一个受控位置除去水分，不让它在管路其他地方冷凝，并用标定气证明目标气体仍能到达分析仪。从加盖污水池抽取的空气很潮湿。其中的水汽一旦在样气管路里冷凝，就会溶解一部分 H₂S 和多得多的氨，分析仪读数随之偏低，却不会显示故障。",[7976,7979],{"kind":4203,"content":7977},[7978],{"text":7974},{"kind":4310,"ordered":3930,"items":7980},[7981,7988,7994,7997],[7982,7984,7986],{"text":7983},"可以用带自动排水的冷却器除去水分，也可以让管路保持加热、在冷凝器中干燥样气。详见",{"text":7985,"href":7289},"水分如何去除",{"text":7987},"。",[7989,7991,7993],{"text":7990},"确认路径上的每个过滤器都能让目标气体通过：曾有一个除湿过滤器让 1,000 ppm 的氨读数降到零。详见",{"text":7992,"href":7296},"如何检查路径",{"text":7987},[7995],{"text":7996},"在探杆进口处通入标定气，而不只是在分析仪处通气，这样才能测出管路去除了多少气体。",[7998,8000,8002],{"text":7999},"除了传感器本身的响应时间，还要算上气体流经管路所需的时间。详见",{"text":8001,"href":7306},"管路长度与响应时间",{"text":7987},{"id":7309,"heading":8004,"paragraphs":8005,"blocks":8010},"为什么潮湿的样气管路会让 H₂S 和氨读数下降？",[8006,8007,8008,8009],"因为气体溶解在管路中冷凝的水里。抽取式采样时，泵把池内空气经样气管路抽到池外的分析仪。仪器不处在液面上方的潮湿空间（顶空）里，无需开池即可维护，下文介绍的两个逸云天项目都是如此。[S4] [S5] 这样一来，读数就取决于气体在管路中经历了什么。","潮湿空气和液态水是两个不同的问题。相对湿度（%RH）表示空气所含水汽接近其在该温度下所能容纳最大量的程度。GTYQ-MIC-600 固定式检测器的规定湿度范围为 10–95 %RH，因此仅仅是空气潮湿，仍在其范围之内。[S9] 空气冷却到露点以下时就会形成液态水；露点是这部分空气达到 100 %RH 时的温度。温暖潮湿的池内空气（例如示例 1 中厌氧池上方的空气）在穿过较冷环境的管路中可能降到露点以下，部分水汽随之在管壁上变成液态水（冷凝水）。[S4]","H₂S 和氨都会溶入这些水，而氨要容易得多。在 25 °C 下，与样气达到平衡的 1 升水所含的氨约为 1 升该空气的 1,500 倍，而 H₂S 只有约 2.5 倍。[S1] 因此，1 毫升冷凝水就能容纳约 1.5 升样气中的氨。溶入管路的气体永远到不了传感器，仪器读数就会偏低。读数偏低是危险的误差，因为系统看起来仍在正常工作。","另有一些检测器设计为直接装在冷凝空气中的风管或流通池里。工厂中哪些区域需要个人、固定式或抽取式监测，见水与污水行业页面。",[8011,8020,8031,8038],{"kind":4203,"content":8012},[8013,8015,8016,8017,8018],{"text":8014},"因为气体溶解在管路中冷凝的水里。抽取式采样时，泵把池内空气经样气管路抽到池外的分析仪。仪器不处在液面上方的潮湿空间（顶空）里，无需开池即可维护，下文介绍的两个逸云天项目都是如此。",{"text":4356,"href":4357,"citation":10},{"text":4287},{"text":4452,"href":4453,"citation":10},{"text":8019},"这样一来，读数就取决于气体在管路中经历了什么。",{"kind":4203,"content":8021},[8022,8024,8025,8027,8028,8030],{"text":8023},"潮湿空气和液态水是两个不同的问题。相对湿度（%RH）表示空气所含水汽接近其在该温度下所能容纳最大量的程度。",{"text":7331,"href":192},{"text":8026}," 固定式检测器的规定湿度范围为 10–95 %RH，因此仅仅是空气潮湿，仍在其范围之内。",{"text":4658,"href":4659,"citation":10},{"text":8029},"空气冷却到露点以下时就会形成液态水；露点是这部分空气达到 100 %RH 时的温度。温暖潮湿的池内空气（例如示例 1 中厌氧池上方的空气）在穿过较冷环境的管路中可能降到露点以下，部分水汽随之在管壁上变成液态水（冷凝水）。",{"text":4356,"href":4357,"citation":10},{"kind":4203,"content":8032},[8033,8035,8036],{"text":8034},"H₂S 和氨都会溶入这些水，而氨要容易得多。在 25 °C 下，与样气达到平衡的 1 升水所含的氨约为 1 升该空气的 1,500 倍，而 H₂S 只有约 2.5 倍。",{"text":4208,"href":4209,"citation":10},{"text":8037},"因此，1 毫升冷凝水就能容纳约 1.5 升样气中的氨。溶入管路的气体永远到不了传感器，仪器读数就会偏低。读数偏低是危险的误差，因为系统看起来仍在正常工作。",{"kind":4203,"content":8039},[8040,8042,8044],{"text":8041},"另有一些检测器设计为直接装在冷凝空气中的风管或流通池里。工厂中哪些区域需要个人、固定式或抽取式监测，见",{"text":8043,"href":79},"水与污水行业页面",{"text":7987},{"id":7353,"heading":8046,"paragraphs":8047,"blocks":8050},"如何去除水分而不损失气体？",[8048,8049],"在一个按样气条件选定的受控位置去除，而不是管路哪里冷就在哪里析出。水必须在样气到达检测器之前去除：接近饱和的样气超出 MIC-600 95 %RH 的上限，随样气带入的液体还可能损坏分析仪。[S9] 在这个位置之前，样气要保持在露点以上。美国 EPA 针对仪器式气体分析仪的参考方法要求，除样气预处理部件外，所有部件都要做到这一点，并要求冷凝水与样气尽量少接触。[S12]","无论采用哪种处理环节，其过滤器都必须能让目标气体通过。整条路径的通气检查能确认是否如此。",[8051,8059,8064,8104],{"kind":4203,"content":8052},[8053,8055,8056,8058],{"text":8054},"在一个按样气条件选定的受控位置去除，而不是管路哪里冷就在哪里析出。水必须在样气到达检测器之前去除：接近饱和的样气超出 MIC-600 95 %RH 的上限，随样气带入的液体还可能损坏分析仪。",{"text":4658,"href":4659,"citation":10},{"text":8057},"在这个位置之前，样气要保持在露点以上。美国 EPA 针对仪器式气体分析仪的参考方法要求，除样气预处理部件外，所有部件都要做到这一点，并要求冷凝水与样气尽量少接触。",{"text":4695,"href":4696,"citation":10},{"kind":4950,"items":8060},[8061],{"url":7370,"alt":8062,"caption":8063,"width":7373,"height":7374},"加盖水池的等轴测图：水池上装有采样探杆，伴热样气管路架在两个管架上，一个打开的机柜内装有冷却器、带排水泵和排水阀的气水分离器、采样泵、流量计和气体检测器。","图 1 · 从左至右：带采样探杆的加盖水池；架在两个管架上的伴热样气管路；打开的机柜，内有冷却器、气水分离器（高亮）及其下方的蠕动排水泵和电磁排水阀、采样泵、流量计和气体检测器；右侧为排气出口。图示为资料所载预处理环节的概念布置，不是产品图或安装布置图。",{"kind":4310,"ordered":3930,"items":8065},[8066,8078,8096],[8067,8069,8071,8072,8074,8075,8077],{"text":8068,"strong":10},"带自动排水的冷却环节。",{"text":8070},"对于示例 1 中厌氧池上方温暖潮湿的空气，",{"text":7383,"href":244},{"text":8073}," 预处理系统在机柜内用半导体（固态）冷却器冷却样气，让水在那里冷凝并自动排出，再把干燥后的样气送到同一机柜内的 GTYQ-MIC-600。",{"text":4356,"href":4357,"citation":10},{"text":8076},"资料记载 TH-2000-C 正是以这种方式处理高湿、低尘样气。",{"text":4593,"href":4594,"citation":10},[8079,8081,8083,8084,8086,8087,8089,8090,8092,8093,8095],{"text":8080,"strong":10},"伴热管路与两级冷凝器。",{"text":8082},"需要准确测量低浓度水溶性气体时，样气管路会做伴热，即缠绕电伴热带，使水无法在管内冷凝。",{"text":4695,"href":4696,"citation":10},{"text":8085},"随后样气在两级冷凝器中干燥，冷凝器把露点保持在 4–5 °C。",{"text":4289,"href":4290,"citation":10},{"text":8088},"在",{"text":7402,"href":132},{"text":8091}," 分析仪上，这种布置的作用就是减少水溶性组分的损失。",{"text":4335,"href":4336,"citation":10},{"text":8094},"室外管路可能结冰的地方，也会因此做伴热。",{"text":4593,"href":4594,"citation":10},[8097,8099,8101,8102,8103],{"text":8098,"strong":10},"简单预处理。",{"text":8100},"在逸云天资料所载的预处理方案中，不带冷却的简单预处理适用于常温、低湿、无尘的样气；潮湿样气则在冷却环节中干燥。",{"text":4593,"href":4594,"citation":10},{"text":4287},{"text":4658,"href":4659,"citation":10},{"kind":4203,"content":8105},[8106,8108,8110],{"text":8107},"无论采用哪种处理环节，其过滤器都必须能让目标气体通过。",{"text":8109,"href":7296},"整条路径的通气检查",{"text":8111},"能确认是否如此。",{"id":7426,"heading":8113,"paragraphs":8114,"blocks":8118},"怎样确认样气路径没有吸收气体？",[8115,8116,8117],"在探杆进口处通入标定气（已知浓度的钢瓶气），把读数与同一气体直接通入分析仪时的读数比较。两者之差，就是管路、过滤器和预处理去除的部分。美国 EPA 方法 7E（美国烟道测试方法）把这一差值称为系统偏差；做系统检查时，气体从探杆处通入，位于过滤器和全部样气预处理部件的上游。[S12]","逸云天在一个氨处理项目发货前做过这项检查：分析仪单独测量 1,000 ppm 氨标定气时读数正确，装上样气预处理后读数却为零。原因是除湿过滤器吸附了氨。去掉该过滤器后，标定气就能到达分析仪了。[S6] 过滤器材质很关键：一项实验室研究中，纸质和燃油过滤器会吸附氨，首次接触时最明显，而 PTFE（特氟龙）过滤器几乎不吸附。[S13] 任何需要输送氨的路径，投入使用前都应先用氨测试组装好的整条路径。","安装后，在探杆进口处再做一次检查。冲击测试（短时通入测试气）只能说明气体能通过、报警会动作，不能说明损失了多少；只在分析仪端口做的标定同样看不出这部分损失。OSHA 关于直读式监测仪的指南（美国咨询性公告）指出，冲击测试不能衡量准确度，并把采样管列为标定链中的一环。[S11] 冲击测试、标定检查和完整标定之间的区别，见个人气体监测指南。水与污水页面介绍了 HSE 的一项调查：完整的采样布置对一种可燃蒸气的响应，远慢于检测器单独使用时。",[8119,8124,8134],{"kind":4203,"content":8120},[8121,8123],{"text":8122},"在探杆进口处通入标定气（已知浓度的钢瓶气），把读数与同一气体直接通入分析仪时的读数比较。两者之差，就是管路、过滤器和预处理去除的部分。美国 EPA 方法 7E（美国烟道测试方法）把这一差值称为系统偏差；做系统检查时，气体从探杆处通入，位于过滤器和全部样气预处理部件的上游。",{"text":4695,"href":4696,"citation":10},{"kind":4203,"content":8125},[8126,8128,8129,8131,8132],{"text":8127},"逸云天在一个氨处理项目发货前做过这项检查：分析仪单独测量 1,000 ppm 氨标定气时读数正确，装上样气预处理后读数却为零。原因是除湿过滤器吸附了氨。去掉该过滤器后，标定气就能到达分析仪了。",{"text":4461,"href":4462,"citation":10},{"text":8130},"过滤器材质很关键：一项实验室研究中，纸质和燃油过滤器会吸附氨，首次接触时最明显，而 PTFE（特氟龙）过滤器几乎不吸附。",{"text":4699,"href":4700,"citation":10},{"text":8133},"任何需要输送氨的路径，投入使用前都应先用氨测试组装好的整条路径。",{"kind":4203,"content":8135},[8136,8138,8139,8141,8143,8144,8146],{"text":8137},"安装后，在探杆进口处再做一次检查。冲击测试（短时通入测试气）只能说明气体能通过、报警会动作，不能说明损失了多少；只在分析仪端口做的标定同样看不出这部分损失。OSHA 关于直读式监测仪的指南（美国咨询性公告）指出，冲击测试不能衡量准确度，并把采样管列为标定链中的一环。",{"text":4671,"href":4672,"citation":10},{"text":8140},"冲击测试、标定检查和完整标定之间的区别，见",{"text":8142,"href":48},"个人气体监测指南",{"text":7987},{"text":8145,"href":7460},"水与污水页面",{"text":8147},"介绍了 HSE 的一项调查：完整的采样布置对一种可燃蒸气的响应，远慢于检测器单独使用时。",{"id":7464,"heading":8149,"paragraphs":8150,"blocks":8156},"示例 1：厌氧池上方 H₂S、甲烷等五种气体的报警",[8151,8152,8153,8154,8155],"在一个密闭的厌氧污水池上方，监测任务是五种气体的报警。厌氧处理使水温升高，池面上方的空气又热又富含水汽。运营方希望 H₂S、甲烷（CH₄）、一氧化碳（CO）、二氧化碳（CO₂）或氧气（O₂）任一种超出限值时就报警。报警后，工作人员会去检查通风是否失效。[S4]","逸云天提供了一套 TH-2000-C 样气预处理系统，配一台可检测五种气体的 GTYQ-MIC-600 检测器，装在室外防雨机柜中。规定的量程如下：","一台无刷直流泵在 20 m 采样距离上抽取池内空气，系统随附 10 m 样气管。机柜内，半导体冷却器使水冷凝析出，过滤器除去残余水分和粉尘，蠕动泵（通过挤压软管输送液体的泵）和电磁阀自动排出冷凝水。7 英寸触摸屏显示全部五个读数。[S4]","首次询价时，现场要求没有完全说明。评审规格时，现场确认了安装位置的危险区域要求，机柜规格在发货前作了更新。报警点在工厂预设，逸云天工程师通过视频指导安装和接线，系统随后投入使用。[S4]","这些量程用于工艺池上方的报警，与池边作业人员的接触限值无关，这些人员仍需佩戴个人监测仪。",[8157,8162,8172,8212,8217,8222],{"kind":4203,"content":8158},[8159,8161],{"text":8160},"在一个密闭的厌氧污水池上方，监测任务是五种气体的报警。厌氧处理使水温升高，池面上方的空气又热又富含水汽。运营方希望 H₂S、甲烷（CH₄）、一氧化碳（CO）、二氧化碳（CO₂）或氧气（O₂）任一种超出限值时就报警。报警后，工作人员会去检查通风是否失效。",{"text":4356,"href":4357,"citation":10},{"kind":4203,"content":8163},[8164,8166,8167,8169,8170],{"text":8165},"逸云天提供了一套",{"text":7383,"href":244},{"text":8168}," 样气预处理系统，配一台可检测五种气体的",{"text":7331,"href":192},{"text":8171}," 检测器，装在室外防雨机柜中。规定的量程如下：",{"kind":4213,"caption":8173,"headers":8174,"rows":8181},"规定量程：厌氧池报警系统",[8175,8178],[8176],{"text":8177},"气体",[8179],{"text":8180},"量程",[8182,8188,8194,8200,8206],{"cells":8183},[8184,8186],[8185],{"text":2361},[8187],{"text":4389},{"cells":8189},[8190,8192],[8191],{"text":2476},[8193],{"text":7509},{"cells":8195},[8196,8198],[8197],{"text":2460},[8199],{"text":7516},{"cells":8201},[8202,8204],[8203],{"text":2485},[8205],{"text":4870},{"cells":8207},[8208,8210],[8209],{"text":2468},[8211],{"text":7529},{"kind":4203,"content":8213},[8214,8216],{"text":8215},"一台无刷直流泵在 20 m 采样距离上抽取池内空气，系统随附 10 m 样气管。机柜内，半导体冷却器使水冷凝析出，过滤器除去残余水分和粉尘，蠕动泵（通过挤压软管输送液体的泵）和电磁阀自动排出冷凝水。7 英寸触摸屏显示全部五个读数。",{"text":4356,"href":4357,"citation":10},{"kind":4203,"content":8218},[8219,8221],{"text":8220},"首次询价时，现场要求没有完全说明。评审规格时，现场确认了安装位置的危险区域要求，机柜规格在发货前作了更新。报警点在工厂预设，逸云天工程师通过视频指导安装和接线，系统随后投入使用。",{"text":4356,"href":4357,"citation":10},{"kind":4203,"content":8223},[8224],{"text":8155},{"id":7544,"heading":8226,"paragraphs":8227,"blocks":8232},"示例 2：以 0.01 ppm 分辨率测量氨和 H₂S，评估处理效果",[8228,8229,8230,8231],"在一个加盖的污水储池，测量目的是评估处理效果，而不是报警。客户自建了去除池面上方空气中氨和 H₂S 的设备，需要数据证明其效果，读数分辨率要达到 0.01 ppm。空气为常温常压，潮湿且无尘。[S5]","逸云天规定的配置是：经 10 m 软管从池体风管抽取空气，送到一台泵吸式在线监测仪，监测仪装在室外 304 不锈钢机柜中，防护等级 IP67。两种气体都用电化学传感器测量，量程 0–25 ppm，分辨率 0.01 ppm；氨传感器选用抗 H₂S 干扰的型号，同时记录温度。传感器前设有预处理环节，用于除去水汽。[S5]","0–100 ppm H₂S 量程上的报警，需要的是远高于零的可靠读数；0.01 ppm 级的处理效果测量，则要求路径能无损地通过极低浓度。","测量处理装置的进出口两侧，意味着两个要求不同的测量点。在一个工业氨处理项目中，进口样气温度高（75 °C）、处于负压（3.5 kPa），量程规定为 0–15,000 mg\u002FNm³（毫克每标准立方米），因此规定采用冷却加可调谐二极管激光吸收光谱（TDLAS）分析仪；这里选用这种光学方法，是因为浓度高。出口样气为常温，量程 0–20 mg\u002FNm³，规定采用电化学传感器。[S6]",[8233,8238,8243,8246],{"kind":4203,"content":8234},[8235,8237],{"text":8236},"在一个加盖的污水储池，测量目的是评估处理效果，而不是报警。客户自建了去除池面上方空气中氨和 H₂S 的设备，需要数据证明其效果，读数分辨率要达到 0.01 ppm。空气为常温常压，潮湿且无尘。",{"text":4452,"href":4453,"citation":10},{"kind":4203,"content":8239},[8240,8242],{"text":8241},"逸云天规定的配置是：经 10 m 软管从池体风管抽取空气，送到一台泵吸式在线监测仪，监测仪装在室外 304 不锈钢机柜中，防护等级 IP67。两种气体都用电化学传感器测量，量程 0–25 ppm，分辨率 0.01 ppm；氨传感器选用抗 H₂S 干扰的型号，同时记录温度。传感器前设有预处理环节，用于除去水汽。",{"text":4452,"href":4453,"citation":10},{"kind":4203,"content":8244},[8245],{"text":8230},{"kind":4203,"content":8247},[8248,8250],{"text":8249},"测量处理装置的进出口两侧，意味着两个要求不同的测量点。在一个工业氨处理项目中，进口样气温度高（75 °C）、处于负压（3.5 kPa），量程规定为 0–15,000 mg\u002FNm³（毫克每标准立方米），因此规定采用冷却加可调谐二极管激光吸收光谱（TDLAS）分析仪；这里选用这种光学方法，是因为浓度高。出口样气为常温，量程 0–20 mg\u002FNm³，规定采用电化学传感器。",{"text":4461,"href":4462,"citation":10},{"id":7571,"heading":8252,"paragraphs":8253,"blocks":8255},"采样点的哪些条件会改变系统配置？",[8254],"高温、接近饱和或含液的样气、粉尘、正压或抽吸，以及干扰气体，每一项都会给样气路径增加一个部件。标准检测器配置面向开放空气和简单的气体背景，因此从污水管道或密闭池体抽取气体时，逸云天技术团队会先评审这些条件。[S7]",[8256,8261],{"kind":4203,"content":8257},[8258,8260],{"text":8259},"高温、接近饱和或含液的样气、粉尘、正压或抽吸，以及干扰气体，每一项都会给样气路径增加一个部件。标准检测器配置面向开放空气和简单的气体背景，因此从污水管道或密闭池体抽取气体时，逸云天技术团队会先评审这些条件。",{"text":4465,"href":4466,"citation":10},{"kind":4213,"caption":8262,"headers":8263,"rows":8270},"采样点条件、需要增加的部件，以及逸云天资料所载的方案",[8264,8267],[8265],{"text":8266},"采样点条件",[8268],{"text":8269},"需要增加的部件，以及逸云天资料所载的方案",[8271,8288,8307,8324,8339],{"cells":8272},[8273,8276],[8274],{"text":8275},"样气温度高",[8277,8279,8281,8282,8283,8285,8287],{"text":8278,"strong":10},"增加：",{"text":8280}," 冷却采样手柄或冷却环节。",{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":8284,"strong":10},"资料所载：",{"text":8286}," TH-2000-C 的样气温度标准为 −40 至 600 °C，可选最高 1,300 °C；其 −40 至 70 °C 是机柜的工作温度范围，不是样气温度。",{"text":4593,"href":4594,"citation":10},{"cells":8289},[8290,8293],[8291],{"text":8292},"样气接近饱和或携带液体",[8294,8295,8297,8298,8299,8300,8302,8303,8304,8305,8306],{"text":8278,"strong":10},{"text":8296}," 在检测器前去除水分。",{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":8284,"strong":10},{"text":8301}," 带自动排水的冷却环节（TH-2000-C），或伴热管路加露点 4–5 °C 的两级冷凝器（DOAS-3000）；MIC-600 的规定湿度范围为 10–95 %RH。",{"text":4289,"href":4290,"citation":10},{"text":4287},{"text":4593,"href":4594,"citation":10},{"text":4287},{"text":4658,"href":4659,"citation":10},{"cells":8308},[8309,8312],[8310],{"text":8311},"粉尘",[8313,8314,8316,8317,8318,8319,8321,8322,8323],{"text":8278,"strong":10},{"text":8315}," 粉尘过滤，防止路径堵塞。",{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":8284,"strong":10},{"text":8320}," TH-2000-C 针对含尘样气增加气体净化与反吹单元；MIC-600 的预处理方案分三个等级：常温、低湿、无尘；高温高湿、少尘；高温、高湿、多尘。",{"text":4593,"href":4594,"citation":10},{"text":4287},{"text":4658,"href":4659,"citation":10},{"cells":8325},[8326,8329],[8327],{"text":8328},"正压或抽吸",[8330,8331,8333,8334,8335,8336,8338],{"text":8278,"strong":10},{"text":8332}," 正压时增加减压阀和流量计，抽吸时增加抽气量更大的采样泵。",{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":8284,"strong":10},{"text":8337}," 资料记载 TH-2000-C 可用于正压或负压采样点。",{"text":4593,"href":4594,"citation":10},{"cells":8340},[8341,8344],[8342],{"text":8343},"背景中有干扰性、腐蚀性或酸性气体",[8345,8346,8348,8349,8350,8351,8353,8354,8355],{"text":8278,"strong":10},{"text":8347}," 按气体混合物选择传感原理，例如高精度红外或光离子化检测器（PID）。",{"text":4465,"href":4466,"citation":10},{"text":4287},{"text":8284,"strong":10},{"text":8352}," 示例 2 选用了抗 H₂S 干扰的氨传感器；高浓度的氨进口样气规定采用 TDLAS。",{"text":4452,"href":4453,"citation":10},{"text":4287},{"text":4461,"href":4462,"citation":10},{"id":7677,"heading":8357,"paragraphs":8358,"blocks":8362},"气体到达分析仪需要多长时间？",[8359,8360,8361],"大致是管路内容积除以样气流量，再加上传感器本身的响应时间。例如，内径 4 mm 的管路每 20 m 容积约 0.25 L，按 2 L\u002Fmin 计算，气体流过 20 m 约需 8 秒，流过 70 m 约需 26 秒。传感器的响应时间还要另加：逸云天给出的 H₂S 和氨传感器 T90（达到最终读数 90% 所需的时间）最长 30 s，甲烷最长 10 s。[S10]","预处理环节会增加容积，吸附或冷凝水还可能使响应大大变慢，因此真正有意义的，是安装后在样气进口通气实测的响应。美国 EPA 方法 7E 对响应时间的定义也是从采样点浓度变化开始计算。[S12] TH-2000-C 标准采样距离为 30–40 m，选配射流泵或真空泵可延长到 70 m 以上。样气流量标准为 2 L\u002Fmin，可选 4 L\u002Fmin。[S8]","机柜应尽量靠近池体安装，以现场条件允许为准。测量后的样气还需要有去处；样气中含有 H₂S，出口必须接到安全的排放点。",[8363,8368,8376],{"kind":4203,"content":8364},[8365,8367],{"text":8366},"大致是管路内容积除以样气流量，再加上传感器本身的响应时间。例如，内径 4 mm 的管路每 20 m 容积约 0.25 L，按 2 L\u002Fmin 计算，气体流过 20 m 约需 8 秒，流过 70 m 约需 26 秒。传感器的响应时间还要另加：逸云天给出的 H₂S 和氨传感器 T90（达到最终读数 90% 所需的时间）最长 30 s，甲烷最长 10 s。",{"text":4667,"href":4668,"citation":10},{"kind":4203,"content":8369},[8370,8372,8373,8375],{"text":8371},"预处理环节会增加容积，吸附或冷凝水还可能使响应大大变慢，因此真正有意义的，是安装后在样气进口通气实测的响应。美国 EPA 方法 7E 对响应时间的定义也是从采样点浓度变化开始计算。",{"text":4695,"href":4696,"citation":10},{"text":8374}," TH-2000-C 标准采样距离为 30–40 m，选配射流泵或真空泵可延长到 70 m 以上。样气流量标准为 2 L\u002Fmin，可选 4 L\u002Fmin。",{"text":4593,"href":4594,"citation":10},{"kind":4203,"content":8377},[8378],{"text":8361},{"id":7701,"heading":8380,"paragraphs":8381,"blocks":8384,"links":8420},"询价时应提供哪些信息？",[8382,8383],"气体种类、采样点条件和管路走向；不需要先选定型号。","危险区域安装的证书覆盖范围取决于型号和配置，我们的销售工程师会针对您指定的配置确认。询价清单列出了一般项目信息。",[8385,8388,8412],{"kind":4203,"content":8386},[8387],{"text":8382},{"kind":4310,"ordered":3930,"items":8389},[8390,8393,8396,8399,8402,8405,8409],[8391],{"text":8392},"气体与量程，以及测量是用于报警，还是用于工艺或处理效果数据。",[8394],{"text":8395},"水池或风管，以及采样点处于抽吸还是正压状态。",[8397],{"text":8398},"样气温度、含湿情况，以及管路经过的最冷位置。",[8400],{"text":8401},"采样点的粉尘、油脂、泡沫或液体夹带情况，以及存在的其他气体。",[8403],{"text":8404},"管路长度和走向，以及测量后的样气可以排放到哪里。",[8406,8408],{"text":8407},"室内或室外安装、可用电源，以及控制系统需要的信号。TH-2000-C 提供 4–20 mA、RS485 和无源触点。",{"text":4593,"href":4594,"citation":10},[8410],{"text":8411},"所在国家，以及机柜安装位置的危险区域划分。",{"kind":4203,"content":8413},[8414,8416,8418],{"text":8415},"危险区域安装的证书覆盖范围取决于型号和配置，我们的销售工程师会针对您指定的配置确认。",{"text":8417,"href":266},"询价清单",{"text":8419},"列出了一般项目信息。",[8421,8427,8430],{"id":7744,"label":8422,"target":8423},"咨询污水池监测需求",{"kind":5585,"path":300,"query":8424},{"type":7748,"context":8425,"gasRequirements":8426,"source":292},"污水池样气路径","硫化氢（H₂S）、氨（NH₃）",{"id":7752,"label":8428,"target":8429},"查看污水处理的监测任务",{"kind":5585,"path":79},{"id":7756,"label":8431,"target":8432},"查看固定式与区域监测任务",{"kind":5585,"path":35},{"id":5267,"heading":8434,"paragraphs":8435,"blocks":8437},"参考资料",[8436],"正文中的方括号编号链接到下列来源。本页的项目配置和出厂测试记录来自逸云天技术团队的项目记录。产品数据来自逸云天 TH-2000-C、GTYQ-MIC-600 和 DOAS-3000 的产品资料。",[8438,8441],{"kind":4203,"content":8439},[8440],{"text":8436},{"kind":4213,"caption":8442,"headers":8443,"rows":8453},"本指南引用的来源",[8444,8447,8450],[8445],{"text":8446},"编号",[8448],{"text":8449},"来源",[8451],{"text":8452},"支撑内容",[8454,8474,8484,8494,8504,8514,8524,8534,8550,8562,8573,8585,8598],{"id":5289,"cells":8455},[8456,8458,8471],[8457],{"text":5293},[8459,8460,8462,8464,8466,8468,8469],{"text":7781},{"text":8461,"href":7784},"Compilation of Henry's law constants (version 5.0.0) for water as solvent（中译：以水为溶剂的亨利定律常数汇编，5.0.0 版）",{"text":8463},"，Atmospheric Chemistry and Physics 23，10901–12440（2023）；条目：",{"text":8465,"href":7788},"氨",{"text":8467},"、",{"text":2364,"href":7792},{"text":8470},"，检索日期 2026 年 11 月 3 日",[8472],{"text":8473},"25 °C 下的亨利定律溶解度：氨 0.59，H₂S 1.0 × 10⁻³ mol\u002F(m³·Pa)。乘以 RT，即得正文中的水气比，约 1,460 和 2.5。",{"id":5302,"cells":8475},[8476,8478,8481],[8477],{"text":5306},[8479],{"text":8480},"逸云天 DOAS-3000 产品资料：样气预处理说明",[8482],{"text":8483},"伴热样气管路与露点 4–5 °C 的两级冷凝器。",{"id":5315,"cells":8485},[8486,8488,8491],[8487],{"text":5319},[8489],{"text":8490,"href":7815},"逸云天 DOAS-3000 产品页",[8492],{"text":8493},"伴热输送与两级冷凝，用于减少水溶性组分的损失。",{"id":5334,"cells":8495},[8496,8498,8501],[8497],{"text":5338},[8499],{"text":8500},"逸云天项目记录：厌氧污水池上方的五种气体监测系统",[8502],{"text":8503},"示例 1 的工况、配置、量程与调试；抽取式布置。",{"id":5346,"cells":8505},[8506,8508,8511],[8507],{"text":5350},[8509],{"text":8510},"逸云天配置记录：加盖污水储池上方的氨和 H₂S 监测",[8512],{"text":8513},"示例 2 的工况与配置；抽取式布置。",{"id":5359,"cells":8515},[8516,8518,8521],[8517],{"text":5363},[8519],{"text":8520},"逸云天项目记录：处理装置进出口的氨监测，含发货前通气测试",[8522],{"text":8523},"进出口规格；发货前测试中发现的过滤器吸附问题。",{"id":5372,"cells":8525},[8526,8528,8531],[8527],{"text":5376},[8529],{"text":8530},"逸云天技术团队关于从管道和密闭空间采样的说明",[8532],{"text":8533},"会给样气路径增加部件的条件。",{"id":5385,"cells":8535},[8536,8538,8547],[8537],{"text":5389},[8539,8541,8543,8545],{"text":8540},"逸云天产品规格表（在线监测系统）；",{"text":8542,"href":7868},"TH-2000-C 产品页",{"text":8544},"；",{"text":8546,"href":7873},"油气行业页面",[8548],{"text":8549},"TH-2000-C 的样气温度、采样距离、流量、压力、输出、应用范围与粉尘选项；可能结冰管路的伴热。",{"id":5398,"cells":8551},[8552,8554,8559],[8553],{"text":5402},[8555,8557],{"text":8556},"逸云天产品规格表（固定式检测器）；",{"text":8558,"href":7886},"GTYQ-MIC-600 产品页",[8560],{"text":8561},"MIC-600 的工作湿度、采样方式与预处理等级。",{"id":5411,"cells":8563},[8564,8566,8570],[8565],{"text":5415},[8567,8569],{"text":8568},"逸云天产品规格表（传感器选项）；",{"text":8558,"href":7886},[8571],{"text":8572},"H₂S、氨和甲烷传感器的 T90。",{"id":5424,"cells":8574},[8575,8577,8582],[8576],{"text":5428},[8578,8580],{"text":8579,"href":7908},"OSHA Safety and Health Information Bulletin: Calibrating and Testing Direct-Reading Monitors（中译：OSHA 安全与健康信息公告：直读式监测仪的标定与测试）",{"text":8581},"，SHIB 11-26-2024（美国咨询性指南）",[8583],{"text":8584},"冲击测试不能衡量准确度；采样管是标定链中的一环。",{"id":5437,"cells":8586},[8587,8589,8595],[8588],{"text":5441},[8590,8592,8593],{"text":8591},"美国 EPA ",{"text":7922,"href":7923},{"text":8594},"，40 CFR Part 60，Appendix A-4，第 3 节和第 6.1 节（美国仪器式分析仪烟道测试参考方法）",[8596],{"text":8597},"探杆处的系统标定，以及系统偏差和响应时间的定义；除样气预处理外的部件保持在水汽露点以上；冷凝水与样气尽量少接触。",{"id":5450,"cells":8599},[8600,8602,8608],[8601],{"text":5454},[8603,8604,8606],{"text":7935},{"text":8605,"href":7938},"Assessment of in-line dust filter type and condition on ammonia adsorption（中译：管路粉尘过滤器类型与状态对氨吸附的影响评估）",{"text":8607},"，Transactions of the ASABE 50(5)，1823–1830（2007）",[8609],{"text":8610},"纸质和燃油过滤器会吸附氨，首次接触时最高；PTFE 过滤器的吸附可忽略。",[8612,8615,8618,8621,8624],{"id":7946,"question":8613,"answer":8614},"气体检测器能处理污水池抽出的潮湿空气吗？","潮湿空气可以，只要在检测器的额定范围内；液态水不行。GTYQ-MIC-600 的规定湿度范围为 10–95 %RH。池内空气在样气管路中冷却到露点以下会析出液态水，这些水不应进入分析仪，还会溶解氨，并在较小程度上溶解 H₂S。因此，样气在到达一级受控干燥环节之前要保持在露点以上；美国 EPA 方法 7E 对除样气预处理以外的所有部件都有这项要求。",{"id":7950,"question":8616,"answer":8617},"监测 H₂S 需要伴热样气管路吗？","不一定。关键是水在到达去除位置之前不能冷凝。管路经过的地方比样气露点冷时，伴热管路可以保证这一点；需要以很小的损失测量低浓度水溶性气体，或室外管路可能结冰时，就会采用伴热。厌氧池示例中的系统在机柜内的冷却环节去除水分，其规格中没有管路伴热。",{"id":7954,"question":8619,"answer":8620},"为什么氨分析仪经样气管路测量时读数偏低，甚至为零？","因为氨会溶入冷凝水，还会被某些过滤材料吸附。根据亨利定律常数（Sander，2023），在 25 °C 下，与样气平衡的水每升所含的氨约为空气的 1,500 倍。一项实验室研究中，纸质和燃油过滤器会吸附氨，而 PTFE 过滤器几乎不吸附（Zhu 等，2007）。在一套逸云天系统上，除湿过滤器曾使 1,000 ppm 氨标定气的读数降为零，去掉后才恢复。在探杆进口处通入氨标定气，即可查出损失。",{"id":7958,"question":8622,"answer":8623},"抽取式气体监测仪做冲击测试就够了吗？","不够。冲击测试只能说明传感器有响应、报警会动作；OSHA 指南指出，它不能衡量准确度。它也无法说明样气管路去除了多少气体。要查出这一点，应把探杆进口处通入标定气时的读数，与同一气体直接通入分析仪时的读数比较。美国 EPA 方法 7E 把这一差值称为系统偏差。",{"id":7962,"question":8625,"answer":8626},"气体流经样气管路需要多长时间？","至少是管路内容积除以样气流量。内径 4 mm 的管路按 2 L\u002Fmin 计算，20 m 约需 8 秒，70 m 约需 26 秒。传感器本身的 T90 还要另加，逸云天 H₂S 和氨传感器最长 30 秒，预处理环节或吸附还会再增加时间。安装后在探杆进口通气，测出实际响应。","样气路径评审的概念示意图，不是安装图纸，也不代表某一产品配置。",{"status":663,"indexable":10},{"title":8630,"description":8631},"潮湿污水中 H₂S 与 NH₃ 的气体采样系统","样气管路中冷凝的水会使 H₂S 和氨读数偏低。本文说明应在哪里除水、如何用气体检查路径，并介绍两个逸云天水池项目。","从加盖污水池抽取的空气很潮湿，样气管路中冷凝的水会溶解氨和部分 H₂S，使分析仪读数偏低。应在一个受控位置除去水分，确认过滤器能让目标气体通过，并在探杆进口处通入标定气，检查整条路径。",[],{"productIds":8635,"gasIds":8636,"industryIds":8637,"applicationIds":8638,"id":275,"slug":8639,"type":1048,"status":3921,"language":18,"issueDate":7257,"author":4178,"media":8640,"certificateIds":8645,"marketContent":8646,"sources":8681},[193],[1994,64,2014],[72,76],[37,45],"industrial-gas-leak-detection-project-guide",{"id":8641,"url":8642,"alt":8643,"width":4183,"height":4184,"mimeType":705,"roles":8644},"media-eranntex-leak-technical-guide-cover","\u002Fimages\u002Fresources\u002Feranntex-gas-leak-detection-project-guide-cover.webp","Eranntex technical guide cover: gas leak detection project planning, with an industrial valve, flange and site-plan sheet.",[707,708],[],[8647],{"market":17,"locale":18,"publication":8648,"title":8649,"summary":8650,"body":8651,"faq":8672,"seo":8677,"mediaCaption":8680,"mediaLayout":5515},{"status":663,"indexable":10},"How to Define an Industrial Gas Leak Detection Project","A practical guide to turning a possible release point into clear detector, placement, signal and response requirements.",[8652,8657,8662,8667],{"id":8653,"heading":8654,"paragraphs":8655},"leak-guide-scenario","Describe the release scenario",[8656],"Start with the process, substance and possible release points around equipment, pipework, storage, processing or transfer areas. Site assessment and project requirements determine the final detector quantity and position.",{"id":8658,"heading":8659,"paragraphs":8660},"leak-guide-method","Choose the monitoring role",[8661],"Portable equipment supports inspection and investigation. Fixed gas leak detectors monitor selected locations continuously. Define which role is required before comparing model specifications.",{"id":8663,"heading":8664,"paragraphs":8665},"leak-guide-inputs","Specify the detector requirements",[8666],"Record the gas, range, sampling constraints, environmental conditions, installation position, power, output signal and required local alarm. Also note whether the project requires a controller, relay or other system interface.",{"id":8668,"heading":8669,"paragraphs":8670},"leak-guide-response","Plan the alarm response",[8671],"State where the alarm must be received and which site action it should initiate. Technical teams can then review detector outputs and compatible interfaces against the project design.",[8673],{"id":8674,"question":8675,"answer":8676},"leak-guide-portable-fixed","Should a leak detection project use portable or fixed detectors?","The two serve different tasks. Portable equipment supports mobile checks; fixed equipment monitors selected points continuously. The release scenario and response plan determine whether one or both are required.",{"title":8678,"description":8679},"Industrial Gas Leak Detection Project Guide","Define an industrial gas leak detection project by release scenario, gas, range, placement, signal integration and response workflow.","Conceptual illustration of project planning, not a detector placement design or a live leak test.",[],{"productIds":8683,"gasIds":8684,"industryIds":8685,"applicationIds":8686,"id":267,"slug":1058,"type":1048,"status":3921,"language":18,"issueDate":7257,"author":4178,"media":8687,"certificateIds":8694,"marketContent":8695,"sources":8802},[],[],[72,76,80],[37,41,45,49],{"id":8688,"url":8689,"alt":8690,"width":4183,"height":4184,"mimeType":705,"roles":8691,"localizedAlt":8692},"media-eranntex-quote-technical-guide-cover","\u002Fimages\u002Fresources\u002Feranntex-gas-detector-quotation-checklist-cover.webp","Eranntex technical guide cover: gas detector quotation checklist, with project requirement sheets, a clipboard and pencil.",[707,708],{"zh-CN":8693},"逸云天技术指南封面：气体检测仪询价清单，画面中有项目需求表、写字板和铅笔。",[],[8696,8753],{"market":17,"locale":18,"publication":8697,"title":8698,"summary":8699,"body":8700,"seo":8737,"mediaCaption":8739,"mediaLayout":5515,"faq":8740},{"status":663,"indexable":10},"Gas Detector Quotation Preparation Checklist","A technical quotation needs the target gases and ranges, simultaneous monitoring requirement, site conditions, sampling approach, interfaces and documents. This checklist shows what each input helps verify.",[8701,8710,8719,8728],{"id":8702,"heading":8703,"paragraphs":8704,"checklist":8706},"rfq-operating-context","Application and operating area",[8705],"Record the monitoring task, process area, country of use, ambient conditions and any hazardous-area classification supplied by the project. These details distinguish personal monitoring, leak investigation, fixed area monitoring and online process measurement; equipment suitability still needs model and certificate-scope review.",[8707,8708,8709],"Monitoring task and process area","Country of use and ambient conditions","Project-supplied area classification",{"id":8711,"heading":8712,"paragraphs":8713,"checklist":8715},"rfq-detection-requirement","Gas, range and simultaneous measurement",[8714],"For each target gas, record the range and unit, sampling method and any response condition specified by the project. State how many gases must be monitored at once. A model's available gas options do not confirm that one instrument can measure every listed gas at the same time; the selected configuration must be checked.",[8716,8717,8718],"Target gas, range and unit","Number of gases monitored at once","Sampling and response conditions",{"id":8720,"heading":8721,"paragraphs":8722,"checklist":8724},"rfq-integration","Installation, power and signals",[8723],"For fixed or online equipment, include available power, required outputs, controller and alarm interfaces, installation conditions and any sample-handling requirement. These inputs let the technical team identify integration gaps before a configuration is quoted.",[8725,8726,8727],"Available power and required outputs","Alarm and controller interfaces","Installation and sample-handling conditions",{"id":8729,"heading":8730,"paragraphs":8731,"checklist":8733},"rfq-documents","Documents and approval scope",[8732],"Name the datasheets, manuals, declarations or certificates needed for technical and procurement review, including any destination-market requirement. Check the named certificate party and exact model or configuration scope rather than inferring approval from a product family.",[8734,8735,8736],"Datasheets, manuals and declarations","Destination-market requirements","Named certificate party and exact scope",{"title":8698,"description":8738},"Prepare a gas detector quotation brief covering target gases and ranges, simultaneous measurement, site conditions, sampling, interfaces and certificate scope.","Editorial illustration of quotation preparation, not a completed specification, quotation or order.",[8741,8745,8749],{"id":8742,"question":8743,"answer":8744},"rfq-checklist-faq-inputs","What information does a gas detector supplier need to prepare a technical quotation?","A technical quotation needs four groups of inputs: the monitoring task, process area, country of use, ambient conditions and any hazardous-area classification; each target gas with its range, unit and sampling method, plus how many gases must be measured at once; for fixed or online equipment, the available power, required outputs, controller and alarm interfaces, and sample-handling conditions; and the datasheets, declarations or certificates needed for review, including destination-market requirements.",{"id":8746,"question":8747,"answer":8748},"rfq-checklist-faq-gas-list","If a detector model lists several gases, can one instrument measure all of them at the same time?","Not necessarily. The gas list shows what the model can be configured to detect; how many gases one instrument measures at once depends on the configuration selected. The MS104K-S2, for example, has 59 gases in its documented options but monitors up to two at a time. Stating how many gases must be monitored together lets the supplier check the configuration against that number.",{"id":8750,"question":8751,"answer":8752},"rfq-checklist-faq-family-certificate","Does a certificate issued for a product family cover every model in it?","Not by default. Check the organization named on the certificate and whether its scope lists the exact model or configuration being quoted. A family name or a similar model code does not establish approval.",{"body":8754,"mediaCaption":8787,"mediaLayout":5515,"faq":8788,"market":315,"locale":316,"publication":8798,"seo":8799,"title":1061,"summary":8801},[8755,8763,8771,8779],{"id":8702,"heading":8756,"paragraphs":8757,"checklist":8759},"应用与作业区域",[8758],"记录监测任务、工艺区域、使用国家、环境条件，以及项目提供的危险区域划分。这些信息可区分个人监测、泄漏排查、固定式区域监测和在线工艺测量；设备是否适用，仍需核对具体型号和证书适用范围。",[8760,8761,8762],"监测任务与工艺区域","使用国家与环境条件","项目提供的区域划分",{"id":8711,"heading":8764,"paragraphs":8765,"checklist":8767},"气体、量程与同时测量",[8766],"针对每种目标气体，记录量程和单位、采样方式，以及项目规定的响应条件。说明需要同时监测几种气体。型号可选的气体，并不代表一台仪器能同时测量所列的全部气体；所选配置必须逐项核实。",[8768,8769,8770],"目标气体、量程与单位","需同时监测的气体数量","采样与响应条件",{"id":8720,"heading":8772,"paragraphs":8773,"checklist":8775},"安装、供电与信号",[8774],"固定式或在线设备，还需写明可用电源、所需输出、控制器和报警接口、安装条件，以及样气处理要求。有了这些信息，技术团队可以在报价前发现集成方面的缺口。",[8776,8777,8778],"可用电源与所需输出","报警与控制器接口","安装与样气处理条件",{"id":8729,"heading":8780,"paragraphs":8781,"checklist":8783},"文件与认证范围",[8782],"列出技术评审和采购评审所需的规格书、说明书、声明或证书，包括目标市场的要求。请核对证书上的持证方，以及证书覆盖的确切型号或配置，不要从产品系列推断认证。",[8784,8785,8786],"规格书、说明书与声明","目标市场要求","证书持证方与确切适用范围","询价准备的示意插图，不是已完成的规格、报价或订单。",[8789,8792,8795],{"id":8742,"question":8790,"answer":8791},"气体检测仪供应商做技术报价，需要哪些信息？","技术报价需要四组信息：监测任务、工艺区域、使用国家、环境条件，以及危险区域划分（如有）；每种目标气体的量程、单位和采样方式，以及需要同时测量几种气体；固定式或在线设备还需要可用电源、所需输出、控制器和报警接口，以及样气处理条件；最后是技术和采购评审所需的规格书、声明或证书，包括目标市场的要求。",{"id":8746,"question":8793,"answer":8794},"某个型号列出了多种气体，一台仪器能同时测量全部吗？","不一定。气体清单说明的是该型号可以配置检测哪些气体；一台仪器能同时测几种，取决于所选配置。例如 MS104K-S2 资料中可选的气体有 59 种，但同时最多监测两种。写明需要同时监测几种气体，供应商才能据此核对配置。",{"id":8750,"question":8796,"answer":8797},"为某个产品系列颁发的证书，能覆盖系列中的每个型号吗？","不能默认覆盖。请核对证书上写明的机构名称，以及证书适用范围是否列出了所报价的确切型号或配置。系列名称或相近的型号代码，不能证明已获认证。",{"status":663,"indexable":10},{"title":1061,"description":8800},"准备气体检测仪询价资料：目标气体与量程、同时测量、现场条件、采样、接口与证书适用范围。","一份技术询价需要包括目标气体与量程、同时监测要求、现场条件、采样方式、接口和所需文件。本清单说明每项输入用于核实什么。",[],{"productIds":8804,"gasIds":8805,"industryIds":8806,"applicationIds":8807,"id":8808,"slug":8809,"type":4030,"status":3921,"language":316,"media":8810,"download":8815,"certificateIds":8819,"marketContent":8820,"sources":8824},[],[],[],[],"resource-ms104k-s2-battery-un38-summary-ssp26090210-3","ms104k-s2-battery-un38-summary-ssp26090210-3",{"id":8811,"url":8812,"alt":8813,"width":4037,"height":8814,"mimeType":4039},"media-ms104k-s2-battery-un38-summary-ssp26090210-3-preview","\u002Fimages\u002Fdocuments\u002Ftest-reports\u002Fms104k-s2-battery-un38-summary-ssp26090210-3.jpg","Preview of TN 754042 7.4 V 1750 mAh battery UN 38.3 test summary SSP26090210-3",1516,{"id":8816,"url":8817,"alt":8818,"mimeType":4044},"file-ms104k-s2-battery-un38-summary-ssp26090210-3","\u002Fdocuments\u002Ftest-reports\u002Fms104k-s2-battery-un38-summary-ssp26090210-3.pdf","TN 754042 7.4 V 1750 mAh battery UN 38.3 test summary SSP26090210-3 PDF",[],[8821],{"market":17,"locale":18,"publication":8822,"title":8823},{"status":663,"indexable":3930},"TN 754042 7.4 V 1750 mAh battery UN 38.3 test summary 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是一款可配置一至两种气体的扩散式监测仪，适合两种气体即可覆盖危害评估的作业。需要同时测量 %LEL、O₂ 和 H₂S 的作业，则需要三种或更多气体的配置。MS400-S 标配配置为一至四种气体，扩展配置最多六种；它内置泵，可通过探杆或管路抽气，也可切换为扩散式采样。两款型号的气体与量程均按您订购的配置确认。","进入前从外部检测储罐、容器或人孔内的气体环境是另一项作业，详见受限空间作业指南。",[10265,10268,10280],{"kind":4203,"content":10266},[10267],{"text":10261},{"kind":4203,"content":10269},[10270,10272,10274,10276,10278],{"text":10271},"对于这类作业，个人监测仪能同时测量几种气体，比显示或记录功能更重要。在敞开的量油口处，可燃气体（%LEL）和氧气都需要关注；采出液含 H₂S 时还要加测 H₂S。",{"text":10273,"href":208},"MS104K-S2",{"text":10275}," 是一款可配置一至两种气体的扩散式监测仪，适合两种气体即可覆盖危害评估的作业。需要同时测量 %LEL、O₂ 和 H₂S 的作业，则需要三种或更多气体的配置。",{"text":10277,"href":212},"MS400-S",{"text":10279}," 标配配置为一至四种气体，扩展配置最多六种；它内置泵，可通过探杆或管路抽气，也可切换为扩散式采样。两款型号的气体与量程均按您订购的配置确认。",{"kind":4203,"content":10281},[10282,10284,10286],{"text":10283},"进入前从外部检测储罐、容器或人孔内的气体环境是另一项作业，详见",{"text":10285,"href":40},"受限空间作业指南",{"text":7987},{"id":10288,"navLabel":2321,"heading":10289,"paragraphs":10290,"blocks":10293},"oil-gas-combustible-principle","酸性气体与高浓度：请指定传感原理",[10291,10292],"只写“0–100 %LEL”的规格，漏掉了一项在含硫现场至关重要的选择。催化燃烧传感器在接触 H₂S 或有机硅后可能失去灵敏度；它们的传感反应还需要氧气，因此在惰化容器或充满蒸气的储罐量油口等缺氧空气中，读数会受到限制。烃类红外传感器不需要氧气，一般也不受催化剂中毒影响，但无法检测氢气。请说明测量点预期的背景气体和氧气条件，以便为该作业选择传感原理。","测量气体管线内的 H₂S 时，传感原理同样重要。持续接触高浓度 H₂S 会缩短电化学传感器的寿命，因此对于这类工况，逸云天技术团队推荐差分紫外分析。如果项目仍采用电化学传感，可以改为间隔测量。在一条规定最高 5,000 ppm H₂S 的气田脱硫管线上，团队将其设为每四小时测量一分钟。如需管线测量，请提供预期的 H₂S 浓度以及所需的读数频率，二者共同决定传感原理和测量周期。",[10294,10297],{"kind":4203,"content":10295},[10296],{"text":10291},{"kind":4203,"content":10298},[10299],{"text":10292},{"id":10301,"navLabel":10302,"heading":10303,"paragraphs":10304,"blocks":10306},"oil-gas-fixed-points","固定点位","固定式检测仪：先确定位置，再决定是否组合气体",[10305],"固定式检测仪的安装位置取决于可能的泄漏源、通风情况以及每种气体在该位置的扩散方式，仅凭气体密度无法确定。GTYQ-MIC-600 可在一个外壳内配置一至六种气体，但只有当这些气体都能到达同一安装点时，多气体一体机才有意义。甲烷比空气轻，H₂S 比空气重。如果危害评估预计甲烷会在高处积聚、H₂S 会在地面或排水口附近积聚，就应在两个高度分别安装检测仪。MIC-600 标配输出为 RS485 Modbus RTU 和三线制 4–20 mA，HART 5 为选配，因此规格中应写明接收的控制器或 DCS 及其所需的信号。",[10307],{"kind":4203,"content":10308},[10309,10311,10312],{"text":10310},"固定式检测仪的安装位置取决于可能的泄漏源、通风情况以及每种气体在该位置的扩散方式，仅凭气体密度无法确定。",{"text":7331,"href":192},{"text":10313}," 可在一个外壳内配置一至六种气体，但只有当这些气体都能到达同一安装点时，多气体一体机才有意义。甲烷比空气轻，H₂S 比空气重。如果危害评估预计甲烷会在高处积聚、H₂S 会在地面或排水口附近积聚，就应在两个高度分别安装检测仪。MIC-600 标配输出为 RS485 Modbus RTU 和三线制 4–20 mA，HART 5 为选配，因此规格中应写明接收的控制器或 DCS 及其所需的信号。",{"id":10315,"navLabel":10316,"heading":10317,"paragraphs":10318,"blocks":10323},"oil-gas-process-samples","工艺样气","工艺样气：先考虑样气路径",[10319,10320,10321,10322],"测量管线或容器内部的气体，首先是样气处理问题，其次才是传感器问题。在样气路径中冷凝的水会吸收部分被测气体，随样气带出的液体或污物还可能损坏分析仪。请根据气流的实际成分选择预处理环节。","酸性气体。H₂S 会溶于冷凝水，因此如果采样管线中有水冷凝，气体到达分析仪之前读数就可能偏低。在一套页岩气脱硫撬的出口，处理后的气体须保持在 50 ppm 以下，逸云天为其配用了一台 0–50 ppm 差分紫外分析仪（DOAS-3000）和电伴热采样管线，而不是将水分冷凝除去。","井口伴生气。伴生气可能把油和水分带入样气路径。在一个 CO₂ 驱油田的井口进行现场 CO₂ 监测时，逸云天技术团队在进气口加装了带手动排液的油气分离器、额外的高湿过滤器和防水透气膜，使液体远离红外传感器。","高温、高湿或含尘样气。TH-2000-C 资料记载的应用为排放与烟气监测、烟气脱硫脱硝、锅炉尾气和污水管道。烃类或酸性气体工艺气流不在这些应用之内，因此其采样系统需按项目进行工程设计。对于资料记载的应用，TH-2000-C 用泵抽取样气并在分析前进行预处理，冷却、除湿、过滤和排液环节按项目选定。其标准样气温度为 −40 至 600 °C，最高 1,300 °C 的配置为选配。−40 至 70 °C 是机柜的工作温度范围，而非样气的温度。标准采样距离为 30–40 m，选配射流泵或真空泵可延长至 70 m 以上。室外采样管线可能冻结时，应指定伴热管线。",[10324,10327,10335,10344,10350],{"kind":4203,"content":10325},[10326],{"text":10319},{"kind":4950,"items":10328},[10329],{"url":10330,"width":10331,"height":10332,"alt":10333,"caption":10334},"\u002Fimages\u002Fdiagrams\u002Foil-gas-scene.svg",1100,570,"油气工艺区域示意图：一名胸前佩戴个人气体监测仪的作业人员，工艺容器旁立柱上的一台固定式气体检测仪，以及从容器引至分析仪机柜的一条采样管线。","作业人员的监测仪和固定式检测仪测量的是周围空气。容器内的气体只能经由采样管线及其预处理环节到达分析仪。此为示意场景，设备外形和位置仅作说明，并非安装设计。",{"kind":4203,"content":10336},[10337,10339,10341,10342],{"text":10338,"strong":10},"酸性气体。",{"text":10340},"H₂S 会溶于冷凝水，因此如果采样管线中有水冷凝，气体到达分析仪之前读数就可能偏低。在一套页岩气脱硫撬的出口，处理后的气体须保持在 50 ppm 以下，逸云天为其配用了一台 0–50 ppm 差分紫外分析仪（",{"text":7402,"href":132},{"text":10343},"）和电伴热采样管线，而不是将水分冷凝除去。",{"kind":4203,"content":10345},[10346,10348],{"text":10347,"strong":10},"井口伴生气。",{"text":10349},"伴生气可能把油和水分带入样气路径。在一个 CO₂ 驱油田的井口进行现场 CO₂ 监测时，逸云天技术团队在进气口加装了带手动排液的油气分离器、额外的高湿过滤器和防水透气膜，使液体远离红外传感器。",{"kind":4203,"content":10351},[10352,10354,10355,10356],{"text":10353,"strong":10},"高温、高湿或含尘样气。",{"text":1247},{"text":7383,"href":244},{"text":10357}," 资料记载的应用为排放与烟气监测、烟气脱硫脱硝、锅炉尾气和污水管道。烃类或酸性气体工艺气流不在这些应用之内，因此其采样系统需按项目进行工程设计。对于资料记载的应用，TH-2000-C 用泵抽取样气并在分析前进行预处理，冷却、除湿、过滤和排液环节按项目选定。其标准样气温度为 −40 至 600 °C，最高 1,300 °C 的配置为选配。−40 至 70 °C 是机柜的工作温度范围，而非样气的温度。标准采样距离为 30–40 m，选配射流泵或真空泵可延长至 70 m 以上。室外采样管线可能冻结时，应指定伴热管线。",{"id":10359,"navLabel":10360,"heading":10361,"paragraphs":10362,"blocks":10368},"oil-gas-inquiry","获取报价","油气项目询价需要提供哪些信息",[10363,10364,10365,10366,10367],"个人与远程检测：作业内容、需要同时测量的气体和量程，以及是否需要通过探杆或管路从量油口、储罐或人孔抽气。","固定点位：布局、每个点位的气体，以及控制器或 DCS 及其所需的信号。","工艺样气：气流组分（包括 H₂S、液态烃和游离水）；压力与温度；到机柜的路径；管线是否可能冻结；所需的读数频率；以及样气测量后的去向（放空、火炬或返回工艺）。","所有项目：国家、危险区域划分（例如 Zone 1 或 Class I, Division 1）以及现场要求的认证体系（例如 ATEX 或 IECEx）。","证书适用范围和电池续航取决于型号与配置。我们的销售工程师会针对您指定的配置确认这两项。询价准备清单列出了全部所需信息。",[10369,10391],{"kind":4310,"ordered":3930,"items":10370},[10371,10376,10381,10386],[10372,10374],{"text":10373,"strong":10},"个人与远程检测：",{"text":10375},"作业内容、需要同时测量的气体和量程，以及是否需要通过探杆或管路从量油口、储罐或人孔抽气。",[10377,10379],{"text":10378,"strong":10},"固定点位：",{"text":10380},"布局、每个点位的气体，以及控制器或 DCS 及其所需的信号。",[10382,10384],{"text":10383,"strong":10},"工艺样气：",{"text":10385},"气流组分（包括 H₂S、液态烃和游离水）；压力与温度；到机柜的路径；管线是否可能冻结；所需的读数频率；以及样气测量后的去向（放空、火炬或返回工艺）。",[10387,10389],{"text":10388,"strong":10},"所有项目：",{"text":10390},"国家、危险区域划分（例如 Zone 1 或 Class I, Division 1）以及现场要求的认证体系（例如 ATEX 或 IECEx）。",{"kind":4203,"content":10392},[10393,10395,10397],{"text":10394},"证书适用范围和电池续航取决于型号与配置。我们的销售工程师会针对您指定的配置确认这两项。",{"text":10396,"href":266},"询价准备清单",{"text":10398},"列出了全部所需信息。",[10400,10404,10408,10412],{"id":10401,"question":10402,"answer":10403},"oil-gas-faq-tank-gauging-monitor","储罐计量或取样时，只戴 H₂S 监测仪够吗？","不够。打开储罐顶部的量油口，可能释放出浓度超过爆炸下限的烃类蒸气，并使空气缺氧；只测 H₂S 的监测仪对这两种情况都不会报警。NIOSH 建议从事这项作业的人员佩戴多气体监测仪。在量油口处，这意味着要同时测量可燃气体（以 %LEL 计，即浓度占爆炸下限的百分比）和氧气，采出液含 H₂S 时再加测 H₂S，也就是三种或更多气体的配置。",{"id":10405,"question":10406,"answer":10407},"oil-gas-faq-lel-sensing-principle","含硫现场的 %LEL 检测仪，该用催化燃烧传感器还是红外传感器？","按测量点的背景气体和氧气条件来选，并在规格中写明这两项。催化燃烧传感器在接触 H₂S 或有机硅后可能失去灵敏度，传感反应还需要氧气，因此在惰化容器或充满蒸气的量油口等处读数会受到限制。烃类红外传感器不需要氧气，一般也不受催化剂中毒影响，但无法检测氢气。",{"id":10409,"question":10410,"answer":10411},"oil-gas-faq-fixed-methane-h2s","一台固定式多气体检测器能同时监测甲烷和 H₂S 吗？","只有当两种气体都能到达同一安装点时才可以。甲烷比空气轻，H₂S 比空气重；如果危害评估预计甲烷会在高处积聚、H₂S 会在地面或排水口附近积聚，就需要在两个高度分别安装检测器。GTYQ-MIC-600 可在一个外壳内配置一至六种气体，适用于满足这一条件的安装点。",{"id":10413,"question":10414,"answer":10415},"oil-gas-faq-sample-line-low-h2s","为什么采样管线上的 H₂S 分析仪读数会偏低？","H₂S 会溶于样气路径中冷凝的水，部分 H₂S 在到达分析仪之前就可能损失。请根据气流的实际成分选择预处理环节。在一套页岩气脱硫撬的出口，处理后的气体须保持在 50 ppm 以下，逸云天为其配用了一台 0–50 ppm 差分紫外分析仪和电伴热采样管线，而不是将水分冷凝除去。",{"title":10417,"description":10418},"油气行业气体检测：便携式、固定式与工艺采样","油气现场如何让便携式、固定式和采样式气体检测与烃类蒸气、H₂S 和氧气危害相匹配，包括酸性气体样气的处理方法。","油气现场如何让便携式、固定式和采样式气体检测与储罐量油口、酸性气体和工艺测量相匹配，以及每类测量需要说明哪些信息。",{"heroPrimaryLabel":10421,"heroPrimarySectionId":10257,"heroSecondaryLabel":10422,"categoryDescription":10423,"sectionTitles":10424,"applicationCardSummaries":10428},"阅读监测指南","沟通您的油气项目","按测量位置选择：作业人员的呼吸带、固定点位，或从管线、容器中抽取的样气。",{"categories":10425,"applications":10426,"products":10427},"气体检测设备类别","油气现场的监测任务","适用于油气现场的气体检测仪",[10429,10431],{"applicationId":49,"summary":10430},"供在井口、储罐和工艺设备之间走动的作业人员佩戴的监测仪。请根据每项作业的危害确定需同时测量的气体数量。",{"applicationId":41,"summary":10432},"进入前从外部检测储罐、容器或人孔内的气体环境，再在人员进入期间持续监测。该指南涵盖探杆与管路采样。",{"market":17,"locale":18,"publication":10434,"displayName":10435,"h1":10436,"intro":10437,"sections":10438,"faq":10573,"seo":10586,"cardSummary":10589,"pagePresentation":10590},{"status":663,"indexable":10},"Oil & Gas","Gas Detection for Oil & Gas Operations","Upstream and midstream oil and gas sites need three different measurements: the air a worker breathes while moving between wellheads, tanks and process equipment; the air at fixed points near likely release sources; and gas drawn from inside a process line or vessel. Each needs its own instrument and sampling arrangement. Eranntex configures portable detectors, fixed detectors and sample-conditioning systems to the gases and measuring ranges a project specifies.",[10439,10467,10480,10493,10534],{"id":10257,"navLabel":10440,"heading":10441,"paragraphs":10442,"blocks":10446},"Tank hatches","Tank gauging and sampling: why the gas count matters",[10443,10444,10445],"Opening a thief hatch on a production tank can release hydrocarbon gases and vapors that have built up under pressure. NIOSH measured concentrations at open hatches above the lower explosive limit and at levels immediately dangerous to life or health, and describes the result as a highly flammable and oxygen-deficient atmosphere, even where the area is not a confined space. In US surveillance covering 2015–2016, NIOSH counted eight oil and gas worker deaths in eight incidents that met its case definition, among workers transferring fluids, gauging or sampling tanks, or working on top of a tank. Its advice to workers is to wear the required multi-gas monitor and heed its alarms. A monitor that measures H₂S alone gives no warning of hydrocarbon vapor or low oxygen at the hatch.","For this work, the number of gases a personal monitor measures at the same time comes before display or logging features. Combustible gas (%LEL) and oxygen are both at issue at an open hatch, and H₂S is added where the produced fluids contain it. The MS104K-S2 is a diffusion monitor for one or two gases, so it fits tasks where two gases cover the hazard assessment. A task that needs %LEL, O₂ and H₂S together calls for a three-gas configuration or more. The MS400-S has standard configurations for one to four gases and expanded configurations for up to six. It has a built-in pump for drawing air through a probe or line, and it can switch to diffusion sampling. The gases and ranges for either model are confirmed for the configuration you order.","Testing a tank, vessel or manhole atmosphere from outside before entry is a separate task, covered in the confined-space entry guide.",[10447,10450,10460],{"kind":4203,"content":10448},[10449],{"text":10443},{"kind":4203,"content":10451},[10452,10454,10455,10457,10458],{"text":10453},"For this work, the number of gases a personal monitor measures at the same time comes before display or logging features. Combustible gas (%LEL) and oxygen are both at issue at an open hatch, and H₂S is added where the produced fluids contain it. The ",{"text":10273,"href":208},{"text":10456}," is a diffusion monitor for one or two gases, so it fits tasks where two gases cover the hazard assessment. A task that needs %LEL, O₂ and H₂S together calls for a three-gas configuration or more. The ",{"text":10277,"href":212},{"text":10459}," has standard configurations for one to four gases and expanded configurations for up to six. It has a built-in pump for drawing air through a probe or line, and it can switch to diffusion sampling. The gases and ranges for either model are confirmed for the configuration you order.",{"kind":4203,"content":10461},[10462,10464,10466],{"text":10463},"Testing a tank, vessel or manhole atmosphere from outside before entry is a separate task, covered in the ",{"text":10465,"href":40},"confined-space entry guide",{"text":4241},{"id":10288,"navLabel":10468,"heading":10469,"paragraphs":10470,"blocks":10473},"Sensing principle","Sour gas and high concentrations: specify the sensing principle",[10471,10472],"A specification that says only \"0–100 %LEL\" leaves out a choice that matters on sour sites. Catalytic bead sensors can lose sensitivity after exposure to H₂S or silicones. They also need oxygen for the sensing reaction, so their readings are limited in oxygen-deficient air, such as an inerted vessel or a vapor-filled tank hatch. Hydrocarbon infrared sensors do not need oxygen and are not generally affected by catalyst poisoning, but they cannot detect hydrogen. State the background gases and the oxygen conditions expected at the point of measurement, so the sensing principle can be selected for the task.","Sensing principle also matters for H₂S inside a gas line. Continuous exposure to high H₂S concentrations shortens the life of an electrochemical sensor, so for that duty the Eranntex technical team recommends differential UV analysis. Where a project keeps electrochemical sensing, the measurement can run at intervals instead. For one gas-field desulfurization line specified at up to 5,000 ppm H₂S, the team set it to one minute every four hours. If you specify a line measurement, give the expected H₂S concentration and how often a reading is needed. Together these decide the sensing principle and the measurement cycle.",[10474,10477],{"kind":4203,"content":10475},[10476],{"text":10471},{"kind":4203,"content":10478},[10479],{"text":10472},{"id":10301,"navLabel":10481,"heading":10482,"paragraphs":10483,"blocks":10485},"Fixed points","Fixed detectors: decide the location before combining gases",[10484],"Where a fixed detector is mounted depends on the likely release sources, ventilation, and how each gas moves at that location. Gas density alone does not settle it. The GTYQ-MIC-600 can carry one to six gases in one enclosure, but a multi-gas unit only makes sense where all of those gases can reach the same mounting point. Methane is lighter than air and H₂S is heavier. Where the hazard assessment expects methane to collect high and H₂S near the floor or a drain, separate detectors at the two heights cover both. The MIC-600's standard outputs are RS485 Modbus RTU and three-wire 4–20 mA, with HART 5 optional, so the specification should name the receiving controller or DCS and the signal it expects.",[10486],{"kind":4203,"content":10487},[10488,10490,10491],{"text":10489},"Where a fixed detector is mounted depends on the likely release sources, ventilation, and how each gas moves at that location. Gas density alone does not settle it. The ",{"text":7331,"href":192},{"text":10492}," can carry one to six gases in one enclosure, but a multi-gas unit only makes sense where all of those gases can reach the same mounting point. Methane is lighter than air and H₂S is heavier. Where the hazard assessment expects methane to collect high and H₂S near the floor or a drain, separate detectors at the two heights cover both. The MIC-600's standard outputs are RS485 Modbus RTU and three-wire 4–20 mA, with HART 5 optional, so the specification should name the receiving controller or DCS and the signal it expects.",{"id":10315,"navLabel":10494,"heading":10495,"paragraphs":10496,"blocks":10501},"Process samples","Process samples: the sample path comes first",[10497,10498,10499,10500],"Measuring gas from inside a line or vessel is a sample-handling problem before it is a sensor problem. Water that condenses in the sample path can absorb part of the gas being measured, and liquids or dirt carried with the sample can damage the analyzer. Choose the conditioning stages from what the stream actually contains.","Sour gas. H₂S dissolves in condensed water, so a sample line where water condenses can lower the reading before the gas reaches the analyzer. At the outlet of a shale-gas desulfurization skid, where the treated gas had to stay below 50 ppm, Eranntex paired a 0–50 ppm differential UV analyzer (DOAS-3000) with an electrically heat-traced sample line rather than condensing the moisture out.","Associated gas at the wellhead. Associated gas can carry oil and moisture into the sample path. For on-site CO₂ monitoring at the wellheads of a CO₂-flood oilfield, the Eranntex technical team fitted the inlet with an oil-gas separator with a manual drain, an additional high-humidity filter and a waterproof breathable membrane, which keep liquid away from the infrared sensor.","Hot, humid or dusty samples. The TH-2000-C is documented for emissions and flue-gas monitoring, flue-gas desulfurization and denitrification, boiler exhaust and wastewater pipelines. A hydrocarbon or sour-gas process stream is not one of these applications, so its sample system is engineered as a project. For the documented applications, the TH-2000-C draws the sample by pump and conditions it before analysis, with cooling, moisture removal, filtration and drainage stages selected for the project. Its standard sample temperature is −40 to 600 °C, with configurations up to 1,300 °C optional. The −40 to 70 °C figure is the operating range of the cabinet, not of the sample. The standard sampling distance is 30–40 m, and an optional jet or vacuum pump extends it beyond 70 m. Where an outdoor sample line can freeze, it is specified with a heated line.",[10502,10505,10510,10519,10525],{"kind":4203,"content":10503},[10504],{"text":10497},{"kind":4950,"items":10506},[10507],{"url":10330,"width":10331,"height":10332,"alt":10508,"caption":10509},"Conceptual oil and gas process area: a worker wearing a personal gas monitor on the chest, a fixed gas detector on a post beside a process vessel, and a sample line running from the vessel to an analyzer cabinet.","The worker's monitor and the fixed detector measure the surrounding air. Gas inside the vessel reaches the analyzer only through the sample line and its conditioning stages. Conceptual scene; equipment shapes and positions are illustrative, not an installation design.",{"kind":4203,"content":10511},[10512,10514,10516,10517],{"text":10513,"strong":10},"Sour gas.",{"text":10515}," H₂S dissolves in condensed water, so a sample line where water condenses can lower the reading before the gas reaches the analyzer. At the outlet of a shale-gas desulfurization skid, where the treated gas had to stay below 50 ppm, Eranntex paired a 0–50 ppm differential UV analyzer (",{"text":7402,"href":132},{"text":10518},") with an electrically heat-traced sample line rather than condensing the moisture out.",{"kind":4203,"content":10520},[10521,10523],{"text":10522,"strong":10},"Associated gas at the wellhead.",{"text":10524}," Associated gas can carry oil and moisture into the sample path. For on-site CO₂ monitoring at the wellheads of a CO₂-flood oilfield, the Eranntex technical team fitted the inlet with an oil-gas separator with a manual drain, an additional high-humidity filter and a waterproof breathable membrane, which keep liquid away from the infrared sensor.",{"kind":4203,"content":10526},[10527,10529,10531,10532],{"text":10528,"strong":10},"Hot, humid or dusty samples.",{"text":10530}," The ",{"text":7383,"href":244},{"text":10533}," is documented for emissions and flue-gas monitoring, flue-gas desulfurization and denitrification, boiler exhaust and wastewater pipelines. A hydrocarbon or sour-gas process stream is not one of these applications, so its sample system is engineered as a project. For the documented applications, the TH-2000-C draws the sample by pump and conditions it before analysis, with cooling, moisture removal, filtration and drainage stages selected for the project. Its standard sample temperature is −40 to 600 °C, with configurations up to 1,300 °C optional. The −40 to 70 °C figure is the operating range of the cabinet, not of the sample. The standard sampling distance is 30–40 m, and an optional jet or vacuum pump extends it beyond 70 m. Where an outdoor sample line can freeze, it is specified with a heated line.",{"id":10359,"navLabel":10535,"heading":10536,"paragraphs":10537,"blocks":10543},"Request a quote","What to send with an oil and gas inquiry",[10538,10539,10540,10541,10542],"Personal and remote testing: the tasks, the gases and ranges that must be measured at the same time, and whether air is drawn from a hatch, tank or manhole through a probe or line.","Fixed points: the layout, the gases at each point, and the controller or DCS with the signal it expects.","Process samples: the stream composition, including H₂S, liquid hydrocarbons and free water; the pressure and temperature; the route to the cabinet; whether the line can freeze; how often a reading is needed; and where the sample goes after measurement (vent, flare or return to the process).","Every project: the country, the hazardous-area classification (for example Zone 1, or Class I, Division 1) and the certificate scheme the site requires (for example ATEX or IECEx).","Certificate coverage and battery runtime depend on the model and configuration. Our sales engineers confirm both for the configuration you specify. The quotation checklist lists the details in full.",[10544,10566],{"kind":4310,"ordered":3930,"items":10545},[10546,10551,10556,10561],[10547,10549],{"text":10548,"strong":10},"Personal and remote testing:",{"text":10550}," the tasks, the gases and ranges that must be measured at the same time, and whether air is drawn from a hatch, tank or manhole through a probe or line.",[10552,10554],{"text":10553,"strong":10},"Fixed points:",{"text":10555}," the layout, the gases at each point, and the controller or DCS with the signal it expects.",[10557,10559],{"text":10558,"strong":10},"Process samples:",{"text":10560}," the stream composition, including H₂S, liquid hydrocarbons and free water; the pressure and temperature; the route to the cabinet; whether the line can freeze; how often a reading is needed; and where the sample goes after measurement (vent, flare or return to the process).",[10562,10564],{"text":10563,"strong":10},"Every project:",{"text":10565}," the country, the hazardous-area classification (for example Zone 1, or Class I, Division 1) and the certificate scheme the site requires (for example ATEX or IECEx).",{"kind":4203,"content":10567},[10568,10570,10571],{"text":10569},"Certificate coverage and battery runtime depend on the model and configuration. Our sales engineers confirm both for the configuration you specify. The ",{"text":7739,"href":266},{"text":10572}," lists the details in full.",[10574,10577,10580,10583],{"id":10401,"question":10575,"answer":10576},"Is an H₂S monitor enough when gauging or sampling a production tank?","No. An open thief hatch on a tank roof can release hydrocarbon vapor above the lower explosive limit and leave the air oxygen-deficient, and a monitor that measures H₂S alone warns of neither. NIOSH advises workers doing this task to wear a multi-gas monitor. At the hatch, that means measuring combustible gas as a percentage of the lower explosive limit (%LEL) and oxygen at the same time, with H₂S added where the produced fluids contain it, which is a three-gas configuration or more.",{"id":10405,"question":10578,"answer":10579},"Should a %LEL detector on a sour gas site use a catalytic bead or an infrared sensor?","Choose from the background gases and the oxygen level at the measuring point, and state both in the specification. Catalytic bead sensors can lose sensitivity after exposure to H₂S or silicones, and they need oxygen for the sensing reaction, which limits them in an inerted vessel or a vapor-filled hatch. Hydrocarbon infrared sensors do not need oxygen and are not generally affected by catalyst poisoning, but they cannot detect hydrogen.",{"id":10409,"question":10581,"answer":10582},"Can one fixed multi-gas detector monitor both methane and H₂S?","Only where both gases can reach the same mounting point. Methane is lighter than air and H₂S is heavier, so where the hazard assessment expects methane to collect high and H₂S near the floor or a drain, two detectors at different heights are needed. The GTYQ-MIC-600 carries one to six gases in one enclosure for points where that condition holds.",{"id":10413,"question":10584,"answer":10585},"Why can an H₂S analyzer read low on a gas sample line?","H₂S dissolves in water that condenses in the sample path, so part of it can be lost before the gas reaches the analyzer. Choose the conditioning stages from what the stream contains. At the outlet of one shale-gas desulfurization skid, where treated gas had to stay below 50 ppm, Eranntex paired a 0–50 ppm differential UV analyzer with an electrically heat-traced sample line instead of condensing the moisture out.",{"title":10587,"description":10588},"Gas Detection for Oil & Gas: Portable, Fixed and Process Sampling","How oil and gas sites match portable, fixed and sampled gas detection to hydrocarbon vapor, H₂S and oxygen hazards, including how sour-gas samples are handled.","How oil and gas sites match portable, fixed and sampled gas detection to tank-hatch, sour-gas and process measurements, and what to specify for each.",{"heroPrimaryLabel":10591,"heroPrimarySectionId":10257,"heroSecondaryLabel":10592,"categoryDescription":10593,"sectionTitles":10594,"applicationCardSummaries":10598},"Read the monitoring guide","Discuss your oil and gas project","Choose by where the measurement is taken: the worker's breathing zone, a fixed point, or a sample drawn from a line or vessel.",{"categories":10595,"applications":10596,"products":10597},"Gas detection equipment categories","Monitoring tasks on oil and gas sites","Gas detectors for oil and gas sites",[10599,10601],{"applicationId":49,"summary":10600},"Wearable monitors for workers moving between wellheads, tanks and process equipment. Choose the number of gases measured together from the hazards of each task.",{"applicationId":41,"summary":10602},"Testing a tank, vessel or manhole atmosphere from outside before entry, then monitoring while people are inside. The guide covers probe and line sampling.",[],{"id":72,"slug":1020,"gasIds":10605,"applicationIds":10606,"productCategoryIds":10607,"resourceIds":10608,"media":10609,"marketContent":10614,"sources":11258},[1994,1980,64,2014,1987],[49,41,45,37],[101,113,117],[275,267],{"id":10610,"url":1216,"alt":10611,"width":1218,"height":1219,"mimeType":1220,"localizedAlt":10612},"media-industry-chemical","Safety technician inspecting process equipment at a chemical facility",{"zh-CN":10613},"安全技术人员在化工装置巡检工艺设备",[10615,10954],{"market":315,"locale":316,"publication":10616,"displayName":1023,"h1":10617,"intro":10618,"sections":10619,"faq":10913,"seo":10934,"cardSummary":10937,"pagePresentation":10938},{"status":663,"indexable":10},"化工厂气体检测","化工厂的气体检测从所处理的物质和各工艺区域的条件入手。有毒物泄漏、可燃溶剂蒸气以及使用氮气时的氧气置换，需要不同的测量。下面的指南把这些危害与监测任务和设备对应起来，方便您在选定型号前与逸云天沟通需求。",[10620,10705,10827,10871],{"id":10621,"navLabel":10622,"heading":10623,"paragraphs":10624,"blocks":10626,"links":10704},"chemical-operations","工艺区域","按化工工艺区域进行气体检测",[10625],"每个工艺区域可能发生的泄漏各不相同。请用下表把该区域处理的化学品与监测任务以及设备选型的起点对应起来。",[10627,10630],{"kind":4203,"content":10628},[10629],{"text":10625},{"kind":4213,"caption":10631,"headers":10632,"rows":10642,"source":10701},"化工工艺区域、气体危害与监测指导",[10633,10636,10639],[10634],{"text":10635},"工艺区域或作业",[10637],{"text":10638},"需评估的气体危害",[10640],{"text":10641},"监测指导",[10643,10654,10665,10676,10690],{"id":10644,"cells":10645},"row-1",[10646,10649,10652],[10647],{"text":10648},"氯气与次氯酸盐的储存、输送与投加",[10650],{"text":10651},"氯气（Cl₂）与氯化氢（HCl）；酸与次氯酸盐接触时也可能释放氯气",[10653],{"text":1012,"href":35},{"id":10655,"cells":10656},"row-2",[10657,10660,10663],[10658],{"text":10659},"氨的储存、制冷与反应器进料",[10661],{"text":10662},"氨（NH₃）",[10664],{"text":1012,"href":35},{"id":10666,"cells":10667},"row-3",[10668,10671,10674],[10669],{"text":10670},"溶剂储存、罐区与装卸",[10672],{"text":10673},"可燃溶剂蒸气（%LEL，即浓度占其爆炸下限的百分比）、有毒蒸气，以及输送中不相容化学品混合产生的反应产物",[10675],{"text":1007,"href":44},{"id":10677,"cells":10678},"row-4",[10679,10682,10685],[10680],{"text":10681},"氮气惰化、容器进入与维修",[10683],{"text":10684},"缺氧、可燃蒸气、工艺残留的有毒气体，以及设备打开时释放的气体",[10686,10687,10689],{"text":1002,"href":40},{"text":10688},"或",{"text":997,"href":48},{"id":10691,"cells":10692},"row-5",[10693,10696,10699],[10694],{"text":10695},"高温、潮湿或远距离的工艺气流",[10697],{"text":10698},"需要在抽取样气中评估的工艺特定气体",[10700],{"text":855,"href":112},[10702],{"text":10703},"请根据化学品清单、安全数据表和可能的泄漏场景确定需要监测的气体。上表示例只是这项评估的起点。",[],{"id":10706,"navLabel":10707,"heading":10708,"paragraphs":10709,"blocks":10713,"links":10793},"chemical-limits","接触限值","化工厂常见气体的美国接触限值",[10710,10711,10712],"对于美国项目，OSHA 容许接触限值（PEL）是具有强制力的接触限值（也称暴露限值）。NIOSH 发布推荐接触限值（REL）和立即危及生命或健康浓度（IDLH）。请用下表核对化工生产中常见的四种气体的这些参考值。","TWA 指时间加权平均值：OSHA 采用 8 小时班次，NIOSH REL 采用每周 40 小时内每天最多 10 小时。STEL 通常是 15 分钟平均值。IDLH 描述的是立即危险的环境，不是可接受的运行浓度。","接触限值并不自动等于报警设定点。报警值应作为现场危害评估的一部分，与所需的响应一并确定。在杜邦拉波特事故调查中，CSB 发现检测器报警值设定得远高于安全的人员接触限值。该案例说明了为何需要把报警设定与其触发的响应放在一起评估。",[10714,10717,10787,10790],{"kind":4203,"content":10715},[10716],{"text":10710},{"kind":4213,"caption":10718,"headers":10719,"rows":10730,"source":10784},"美国一般工业接触参考值",[10720,10722,10725,10727],[10721],{"text":8177},[10723],{"text":10724},"OSHA PEL",[10726],{"text":4639},[10728],{"text":10729},"IDLH",[10731,10745,10757,10771],{"id":10644,"cells":10732},[10733,10736,10739,10742],[10734],{"text":10735},"氯气（Cl₂）",[10737],{"text":10738},"1 ppm 最高限值",[10740],{"text":10741},"0.5 ppm 最高限值（15 分钟）",[10743],{"text":10744},"10 ppm",{"id":10655,"cells":10746},[10747,10749,10751,10754],[10748],{"text":10662},[10750],{"text":4642},[10752],{"text":10753},"25 ppm TWA；35 ppm STEL",[10755],{"text":10756},"300 ppm",{"id":10666,"cells":10758},[10759,10762,10765,10768],[10760],{"text":10761,"href":63},"硫化氢（H₂S）",[10763],{"text":10764},"20 ppm 最高限值*",[10766],{"text":10767},"10 ppm 最高限值（10 分钟）",[10769],{"text":10770},"100 ppm",{"id":10677,"cells":10772},[10773,10776,10779,10781],[10774],{"text":10775},"氯化氢（HCl）",[10777],{"text":10778},"5 ppm 最高限值",[10780],{"text":10778},[10782],{"text":10783},"50 ppm",[10785],{"text":10786},"*OSHA 一般工业标准允许 H₂S 出现一次最高 50 ppm、持续最长 10 分钟的峰值，前提是该 8 小时班次内没有其他可测得的接触。数值核对于 2026 年 10 月 26 日。",{"kind":4203,"content":10788},[10789],{"text":10711},{"kind":4203,"content":10791},[10792],{"text":10712},[10794,10799,10804,10808,10813,10817,10822],{"id":10795,"label":10796,"target":10797},"chemical-ref-cl2","NIOSH：氯气 IDLH 文件",{"kind":5558,"sourceId":10798},"niosh-chlorine",{"id":10800,"label":10801,"target":10802},"chemical-ref-nh3","NIOSH 袖珍指南：氨",{"kind":5558,"sourceId":10803},"niosh-ammonia",{"id":10805,"label":10806,"target":10807},"chemical-ref-h2s","NIOSH 袖珍指南：硫化氢",{"kind":5558,"sourceId":2393},{"id":10809,"label":10810,"target":10811},"chemical-ref-hcl","NIOSH 袖珍指南：氯化氢",{"kind":5558,"sourceId":10812},"niosh-hydrogen-chloride",{"id":10814,"label":10815,"target":10816},"chemical-ref-h2s-osha","OSHA：硫化氢标准",{"kind":5558,"sourceId":5762},{"id":10818,"label":10819,"target":10820},"chemical-ref-dupont","美国 CSB：杜邦拉波特有毒化学品泄漏事故最终报告（2019）",{"kind":5558,"sourceId":10821},"csb-dupont-laporte-report",{"id":10823,"label":10824,"target":10825},"chemical-ref-limit-definitions","NIOSH 袖珍指南：引言",{"kind":5558,"sourceId":10826},"w04-source-s7",{"id":10828,"navLabel":10829,"heading":10830,"paragraphs":10831,"blocks":10836,"links":10861},"chemical-equipment","设备","选择固定式、便携式与抽取式设备",[10832,10833,10834,10835],"固定式检测器监测工艺设备周围的选定位置，便携式仪器用于个人监测、进入前检测和泄漏排查。抽取式系统把工艺样气引至监测系统。请为每项作业选择方式，再核对所需气体、采样条件与输出。","GTYQ-MIC-600 固定式多气体检测仪可配置一至六种气体，配有本地显示，外壳防护等级 IP66。标配 RS485 Modbus RTU 和三线制 4–20 mA 输出，便于与接收控制器或 DCS 集成；HART 5 为选配。请对照拟定配置核对所需气体与输出。","MS400-S 便携式多气体检测仪内置泵，可用于远程采样，也可切换为扩散式采样。标配配置覆盖一至四种气体，扩展配置最多六种。用于进入前检测或泄漏排查时，请说明气体、采样附件与运行条件。","TH-2000-C 采样与监测系统集抽取式采样与预处理于一体，适用于高温或高湿的工艺气体。资料记载的预处理包括电子制冷、除湿、过滤和排液。请提供样气组分、温度、湿度和采样路径，以便对照目标气体评估项目配置。",[10837,10840,10847,10854],{"kind":4203,"content":10838},[10839],{"text":10832},{"kind":4203,"content":10841},[10842,10843,10845],{"text":1247},{"text":10844,"href":192},"GTYQ-MIC-600 固定式多气体检测仪",{"text":10846},"可配置一至六种气体，配有本地显示，外壳防护等级 IP66。标配 RS485 Modbus RTU 和三线制 4–20 mA 输出，便于与接收控制器或 DCS 集成；HART 5 为选配。请对照拟定配置核对所需气体与输出。",{"kind":4203,"content":10848},[10849,10850,10852],{"text":1247},{"text":10851,"href":212},"MS400-S 便携式多气体检测仪",{"text":10853},"内置泵，可用于远程采样，也可切换为扩散式采样。标配配置覆盖一至四种气体，扩展配置最多六种。用于进入前检测或泄漏排查时，请说明气体、采样附件与运行条件。",{"kind":4203,"content":10855},[10856,10857,10859],{"text":1247},{"text":10858,"href":244},"TH-2000-C 采样与监测系统",{"text":10860},"集抽取式采样与预处理于一体，适用于高温或高湿的工艺气体。资料记载的预处理包括电子制冷、除湿、过滤和排液。请提供样气组分、温度、湿度和采样路径，以便对照目标气体评估项目配置。",[10862,10865,10868],{"id":10863,"label":10844,"target":10864},"chemical-p-mic600",{"kind":5585,"path":192},{"id":10866,"label":10851,"target":10867},"chemical-p-ms400s",{"kind":5585,"path":212},{"id":10869,"label":10858,"target":10870},"chemical-p-th2000c",{"kind":5585,"path":244},{"id":10872,"navLabel":10360,"heading":10873,"paragraphs":10874,"blocks":10876,"links":10897},"chemical-inquiry","沟通您的化工厂监测需求",[10875],"选定型号之前就可以开始询价。请提供每个监测点或作业的现有信息，我们的工程师可以与您一起评估设备方案。以下信息有助于确定仍需确认的其他规格。",[10877,10880],{"kind":4203,"content":10878},[10879],{"text":10875},{"kind":4310,"ordered":3930,"items":10881},[10882,10885,10888,10891,10894],[10883],{"text":10884},"目标气体与量程：写明物质名称、每种气体所需的量程，以及哪些气体需要同时监测。",[10886],{"text":10887},"工艺区域与泄漏场景：说明作业内容和潜在泄漏源；如有现场布置图，请一并提供。",[10889],{"text":10890},"运行与样气条件：包括温度、湿度和压力，以及采样路径和已知的背景气体。",[10892],{"text":10893},"输出与接收设备：说明控制器、PLC 或 DCS 所需的连接方式，包括规定的协议或报警触点。",[10895],{"text":10896},"区域划分与供电：说明危险区域划分（Class\u002FDivision 或 Zone）以及所需的认证；提供可用的交流或直流电压，适用时注明频率和相数。",[10898,10905,10908],{"id":10899,"label":10900,"target":10901},"chemical-project-rfq","沟通您的监测需求",{"kind":5585,"path":300,"query":10902},{"type":10903,"context":10904,"source":71},"system_project","化工厂气体检测需求",{"id":10906,"label":1061,"target":10907},"chemical-checklist",{"kind":5585,"path":266},{"id":10909,"label":10910,"target":10911},"chemical-ref-us-location","29 CFR 1910.307（2025 年版 CFR）",{"kind":5558,"sourceId":10912},"govinfo-1910-307-2025",[10914,10918,10922,10926,10930],{"id":10915,"question":10916,"answer":10917},"chemical-faq-gases","化工厂需要监测哪些气体？","请根据所处理的物质以及各工艺区域可能发生的泄漏选择气体。例如氯气、氨、硫化氢和氯化氢，以 %LEL 计量的可燃蒸气，以及惰性气体可能置换可呼吸空气时的氧气。还应包括不相容化学品混合时可能生成的反应产物。",{"id":10919,"question":10920,"answer":10921},"chemical-faq-setpoints","气体检测仪的报警设定点应与 OSHA PEL 一致吗？","不应。PEL 是接触限值，可以表示为最高限值或规定时段内的平均值。报警设定点决定何时触发警告或响应。报警值与响应措施应通过现场危害评估确定。",{"id":10923,"question":10924,"answer":10925},"chemical-faq-fixed-portable","化工厂需要固定式还是便携式气体检测仪？","固定式与便携式检测仪承担不同的任务。固定式检测仪监测选定位置，便携式仪器用于个人监测、进入前检测或泄漏排查。工艺危害、进入条件与作业活动决定您需要其中一种还是两者结合。",{"id":10927,"question":10928,"answer":10929},"chemical-faq-us-approval","逸云天气体检测仪是否获得美国危险场所认证？","已公开的中国防爆合格证并不能证明获得美国危险场所认证。询价时请提供区域划分与所需认证，以便针对确切的型号和配置核对相关文件。",{"id":10931,"question":10932,"answer":10933},"chemical-faq-no-model","选定型号之前可以询价吗？","可以。请描述工艺区域、监测任务和目标气体，并附上现有的现场图纸或运行条件。在您选定型号之前，我们可以与您一起评审这些信息，并协助确定仍需确认的规格。",{"title":10935,"description":10936,"ogTitle":10935,"ogDescription":10936},"化工厂气体检测：有毒气体、LEL 与氧气","面向 Cl₂、NH₃、H₂S、HCl、可燃蒸气与氧气的化工厂气体检测。对比监测任务、美国接触限值与设备。","按化工工艺区域对比气体危害，查看美国接触限值，并为您的监测任务找到固定式、便携式或抽取式设备。",{"heroPrimaryLabel":10939,"heroPrimarySectionId":10621,"heroSecondaryLabel":10940,"categoryDescription":10941,"sectionTitles":10942,"applicationCardSummaries":10945},"浏览工艺区域","沟通您的监测项目","针对现场的气体、条件与监测任务对比设备类型。",{"categories":10425,"applications":10943,"products":10944},"化工厂的监测任务","适用于化工厂的气体检测仪",[10946,10948,10950,10952],{"applicationId":37,"summary":10947},"固定式或移动式检测器可监测储存、投加和输送设备周围的选定位置。请为每个区域核对目标气体、覆盖范围与报警信号。",{"applicationId":45,"summary":10949},"排查阀门、法兰和输送接口处的潜在泄漏。让目标气体和采样方式与疑似泄漏源及进入条件相匹配。",{"applicationId":41,"summary":10951},"在容器、储罐或地坑内作业前评估气体环境。作业指南介绍了在现场进入管理方案中如何选择气体和考虑采样。",{"applicationId":49,"summary":10953},"个人监测仪支持在巡检和维修中往返于各工艺区域的人员。请为人员可能接触的气体选择可佩戴的配置，并区分呼吸带监测与远程泵吸采样。",{"market":17,"locale":18,"publication":10955,"displayName":10956,"h1":10957,"intro":10958,"sections":10959,"faq":11222,"seo":11238,"cardSummary":11241,"pagePresentation":11242},{"status":663,"indexable":10},"Chemical Processing","Gas Detection for Chemical Plants","Gas detection in chemical plants starts with the substances handled and the conditions in each process area. Toxic releases, flammable solvent vapors and oxygen displacement during nitrogen use require different measurements. The guide below connects these hazards to monitoring tasks and equipment, so you can discuss your requirements with Eranntex before selecting a model.",[10960,11044,11145,11185],{"id":10621,"navLabel":10961,"heading":10962,"paragraphs":10963,"blocks":10965,"links":11043},"Process areas","Gas detection by chemical process area",[10964],"Each process area presents a different set of potential releases. Use the table to connect the chemicals handled in that area with a monitoring task and a starting point for equipment selection.",[10966,10969],{"kind":4203,"content":10967},[10968],{"text":10964},{"kind":4213,"caption":10970,"headers":10971,"rows":10981,"source":11040},"Chemical process areas, gas hazards and monitoring guidance",[10972,10975,10978],[10973],{"text":10974},"Process area or task",[10976],{"text":10977},"Gas hazards to assess",[10979],{"text":10980},"Monitoring guidance",[10982,10993,11003,11014,11029],{"id":10644,"cells":10983},[10984,10987,10990],[10985],{"text":10986},"Chlorine and hypochlorite storage, feed and dosing",[10988],{"text":10989},"Chlorine (Cl₂) and hydrogen chloride (HCl); chlorine can also be released if acid contacts hypochlorite",[10991],{"text":10992,"href":35},"Area monitoring",{"id":10655,"cells":10994},[10995,10998,11001],[10996],{"text":10997},"Ammonia storage, refrigeration and reactor feeds",[10999],{"text":11000},"Ammonia (NH₃)",[11002],{"text":10992,"href":35},{"id":10666,"cells":11004},[11005,11008,11011],[11006],{"text":11007},"Solvent storage, tank farms, loading and unloading",[11009],{"text":11010},"Flammable solvent vapors (%LEL), toxic vapors and reaction products from incompatible chemicals mixed during transfer",[11012],{"text":11013,"href":44},"Leak detection",{"id":10677,"cells":11015},[11016,11019,11022],[11017],{"text":11018},"Nitrogen inerting, vessel entry and maintenance",[11020],{"text":11021},"Oxygen deficiency, flammable vapors, residual toxic gases from the process, and gases released when equipment is opened",[11023,11025,11027],{"text":11024,"href":40},"Confined space entry",{"text":11026}," or ",{"text":11028,"href":48},"personal gas monitoring",{"id":10691,"cells":11030},[11031,11034,11037],[11032],{"text":11033},"Hot, wet or remote process streams",[11035],{"text":11036},"Process-specific gases that need to be assessed in an extracted sample",[11038],{"text":11039,"href":112},"Gas monitoring and analysis systems",[11041],{"text":11042},"Use your chemical inventory, safety data sheets and credible release scenarios to determine which gases to monitor. The examples above are starting points for that assessment.",[],{"id":10706,"navLabel":11045,"heading":11046,"paragraphs":11047,"blocks":11051,"links":11124},"Exposure limits","U.S. exposure limits for chemical-plant gases",[11048,11049,11050],"For U.S. projects, OSHA permissible exposure limits (PELs) are enforceable exposure limits. NIOSH publishes recommended exposure limits (RELs) and immediately dangerous to life or health (IDLH) values. Use the table to review these references for four gases encountered in chemical processing.","TWA means time-weighted average: OSHA uses an 8-hour shift, while NIOSH RELs use up to a 10-hour day during a 40-hour week. A STEL is normally a 15-minute average. IDLH values describe an immediately dangerous atmosphere and are not acceptable operating concentrations.","Exposure limits are not automatic alarm setpoints. Select alarm levels as part of the site hazard assessment, together with the required response. In the DuPont La Porte investigation, the CSB found detector alarms set well above safe worker exposure limits. The case shows why alarm settings and the response they trigger need to be assessed together.",[11052,11055,11118,11121],{"kind":4203,"content":11053},[11054],{"text":11048},{"kind":4213,"caption":11056,"headers":11057,"rows":11066,"source":11115},"U.S. general-industry exposure reference values",[11058,11060,11062,11064],[11059],{"text":7493},[11061],{"text":10724},[11063],{"text":4639},[11065],{"text":10729},[11067,11080,11091,11103],{"id":10644,"cells":11068},[11069,11072,11075,11078],[11070],{"text":11071},"Chlorine (Cl₂)",[11073],{"text":11074},"1 ppm ceiling",[11076],{"text":11077},"0.5 ppm ceiling (15 min)",[11079],{"text":10744},{"id":10655,"cells":11081},[11082,11084,11086,11089],[11083],{"text":11000},[11085],{"text":4642},[11087],{"text":11088},"25 ppm TWA; 35 ppm STEL",[11090],{"text":10756},{"id":10666,"cells":11092},[11093,11095,11098,11101],[11094],{"text":4407,"href":63},[11096],{"text":11097},"20 ppm ceiling*",[11099],{"text":11100},"10 ppm ceiling (10 min)",[11102],{"text":10770},{"id":10677,"cells":11104},[11105,11108,11111,11113],[11106],{"text":11107},"Hydrogen chloride (HCl)",[11109],{"text":11110},"5 ppm ceiling",[11112],{"text":11110},[11114],{"text":10783},[11116],{"text":11117},"*OSHA general industry permits one H₂S peak up to 50 ppm for up to 10 minutes only if no other measurable exposure occurs during the 8-hour shift. Values checked October 26, 2026.",{"kind":4203,"content":11119},[11120],{"text":11049},{"kind":4203,"content":11122},[11123],{"text":11050},[11125,11128,11131,11134,11137,11140,11143],{"id":10795,"label":11126,"target":11127},"NIOSH: Chlorine IDLH documentation",{"kind":5558,"sourceId":10798},{"id":10800,"label":11129,"target":11130},"NIOSH Pocket Guide: Ammonia",{"kind":5558,"sourceId":10803},{"id":10805,"label":11132,"target":11133},"NIOSH Pocket Guide: Hydrogen sulfide",{"kind":5558,"sourceId":2393},{"id":10809,"label":11135,"target":11136},"NIOSH Pocket Guide: Hydrogen chloride",{"kind":5558,"sourceId":10812},{"id":10814,"label":11138,"target":11139},"OSHA: Hydrogen sulfide exposure standards",{"kind":5558,"sourceId":5762},{"id":10818,"label":11141,"target":11142},"U.S. CSB: DuPont La Porte toxic chemical release, final report (2019)",{"kind":5558,"sourceId":10821},{"id":10823,"label":5309,"target":11144},{"kind":5558,"sourceId":10826},{"id":10828,"navLabel":11146,"heading":11147,"paragraphs":11148,"blocks":11153,"links":11178},"Equipment","Selecting fixed, portable and extractive equipment",[11149,11150,11151,11152],"Fixed detectors monitor selected locations around process equipment, while portable instruments support personal monitoring, pre-entry testing and leak investigation. Extractive systems bring a sample from the process to a monitoring system. Choose the approach for each task, then review the required gases, sampling conditions and outputs.","The GTYQ-MIC-600 fixed multigas detector is configurable for one to six gases and provides a local display in an IP66 enclosure. Standard RS485 Modbus RTU and three-wire 4–20 mA outputs support integration with a receiving controller or DCS; HART 5 is optional. Review the required gases and outputs against the proposed configuration.","The MS400-S portable multigas detector has a built-in pump for remote sampling and can switch to diffusion sampling. Standard configurations cover one to four gases, with expanded configurations for up to six. For pre-entry testing or leak investigation, specify the gases, sampling accessories and operating conditions.","The TH-2000-C sampling and monitoring system combines extractive sampling and conditioning for hot or humid process gases. Documented conditioning includes electronic cooling, moisture removal, filtration and drainage. Share the sample composition, temperature, moisture and sampling route so the project configuration can be assessed against the target gases.",[11154,11157,11164,11171],{"kind":4203,"content":11155},[11156],{"text":11149},{"kind":4203,"content":11158},[11159,11160,11162],{"text":5140},{"text":11161,"href":192},"GTYQ-MIC-600 fixed multigas detector",{"text":11163}," is configurable for one to six gases and provides a local display in an IP66 enclosure. Standard RS485 Modbus RTU and three-wire 4–20 mA outputs support integration with a receiving controller or DCS; HART 5 is optional. Review the required gases and outputs against the proposed configuration.",{"kind":4203,"content":11165},[11166,11167,11169],{"text":5140},{"text":11168,"href":212},"MS400-S portable multigas detector",{"text":11170}," has a built-in pump for remote sampling and can switch to diffusion sampling. Standard configurations cover one to four gases, with expanded configurations for up to six. For pre-entry testing or leak investigation, specify the gases, sampling accessories and operating conditions.",{"kind":4203,"content":11172},[11173,11174,11176],{"text":5140},{"text":11175,"href":244},"TH-2000-C sampling and monitoring system",{"text":11177}," combines extractive sampling and conditioning for hot or humid process gases. Documented conditioning includes electronic cooling, moisture removal, filtration and drainage. Share the sample composition, temperature, moisture and sampling route so the project configuration can be assessed against the target gases.",[11179,11181,11183],{"id":10863,"label":11161,"target":11180},{"kind":5585,"path":192},{"id":10866,"label":11168,"target":11182},{"kind":5585,"path":212},{"id":10869,"label":11175,"target":11184},{"kind":5585,"path":244},{"id":10872,"navLabel":10535,"heading":11186,"paragraphs":11187,"blocks":11189,"links":11210},"Discuss your chemical-plant monitoring requirements",[11188],"You can start an inquiry before choosing a model. Share the details available for each monitoring point or task, and our engineers can review equipment options with you. The information below helps identify the remaining specifications to confirm.",[11190,11193],{"kind":4203,"content":11191},[11192],{"text":11188},{"kind":4310,"ordered":3930,"items":11194},[11195,11198,11201,11204,11207],[11196],{"text":11197},"Target gases and measuring ranges: name the substances, the required range for each gas, and which gases must be monitored together.",[11199],{"text":11200},"Process area and release scenario: describe the operation and potential leak sources, and include a site layout if available.",[11202],{"text":11203},"Operating and sample conditions: include temperature, moisture and pressure, plus the sampling route and any known background gases.",[11205],{"text":11206},"Outputs and receiving equipment: describe the connection required by your controller, PLC or DCS, including any specified protocols or alarm contacts.",[11208],{"text":11209},"Area classification and power: state the hazardous-area classification (Class\u002FDivision or Zone) and the required approvals. Provide the available AC or DC voltage and, where applicable, the frequency and number of phases.",[11211,11216,11219],{"id":10899,"label":11212,"target":11213},"Discuss your monitoring requirements",{"kind":5585,"path":300,"query":11214},{"type":10903,"context":11215,"source":71},"Chemical plant gas detection requirements",{"id":10906,"label":11217,"target":11218},"Gas detector quotation checklist",{"kind":5585,"path":266},{"id":10909,"label":11220,"target":11221},"29 CFR 1910.307, 2025 annual CFR edition",{"kind":5558,"sourceId":10912},[11223,11226,11229,11232,11235],{"id":10915,"question":11224,"answer":11225},"What gases are monitored in a chemical plant?","Select the gases from the substances handled and the releases that could occur in each process area. Examples include chlorine, ammonia, hydrogen sulfide and hydrogen chloride, flammable vapors measured in %LEL, and oxygen where inert gas can displace breathable air. Include reaction products that could form if incompatible chemicals mix.",{"id":10919,"question":11227,"answer":11228},"Should gas detector alarm setpoints match OSHA PELs?","No. A PEL is an exposure limit, which may be expressed as a ceiling or an average over a specified period. An alarm setpoint defines when a warning or response is triggered. Select alarm levels and response actions through the site hazard assessment.",{"id":10923,"question":11230,"answer":11231},"Does a chemical plant need fixed or portable gas detectors?","Fixed and portable detectors serve different tasks. Fixed detectors monitor selected locations, while portable instruments support personal monitoring, pre-entry testing or leak investigation. The process hazards, access conditions and work activities determine whether you need one type or a combination.",{"id":10927,"question":11233,"answer":11234},"Are Eranntex gas detectors approved for U.S. hazardous locations?","The published Chinese explosion-protection certificates do not establish U.S. hazardous-location approval. Include your area classification and required approvals when you inquire, so the relevant documents can be checked for the exact model and configuration.",{"id":10931,"question":11236,"answer":11237},"Can I request a quote before choosing a model?","Yes. Describe the process area, monitoring task and target gases, and include any available site drawings or operating conditions. We can review these details with you before you select a model and help identify the specifications that still need confirmation.",{"title":11239,"description":11240,"ogTitle":11239,"ogDescription":11240},"Chemical Plant Gas Detection: Toxic, LEL and Oxygen","Chemical plant gas detection for Cl₂, NH₃, H₂S, HCl, flammable vapors and oxygen. Compare monitoring tasks, U.S. exposure limits and equipment.","Compare gas hazards by chemical process area, review U.S. exposure limits and find fixed, portable or extractive equipment for your monitoring task.",{"heroPrimaryLabel":11243,"heroPrimarySectionId":10621,"heroSecondaryLabel":11244,"categoryDescription":11245,"sectionTitles":11246,"applicationCardSummaries":11249},"Browse process areas","Discuss your monitoring project","Compare equipment types for the gases, conditions and monitoring tasks at your site.",{"categories":10595,"applications":11247,"products":11248},"Monitoring tasks in chemical plants","Gas detectors for chemical plants",[11250,11252,11254,11256],{"applicationId":37,"summary":11251},"Fixed or transportable detectors can monitor selected locations around storage, dosing and transfer equipment. Review the target gases, coverage and alarm signals for each area.",{"applicationId":45,"summary":11253},"Investigate potential releases at valves, flanges and transfer connections. Match the target gas and sampling method to the suspected source and access conditions.",{"applicationId":41,"summary":11255},"Assess the atmosphere before work in vessels, tanks or pits. The task guide covers gas selection and sampling considerations within the site’s entry program.",{"applicationId":49,"summary":11257},"Personal monitors support workers moving between process areas during inspections and maintenance. Choose a wearable configuration for the gases workers may encounter, and distinguish breathing-zone monitoring from remote pump sampling.",[],{"id":80,"slug":1025,"gasIds":11260,"applicationIds":11261,"productCategoryIds":11262,"resourceIds":11263,"media":11264,"marketContent":11270,"sources":11788},[1994,64,2014,1987],[49,41,37],[101,113,117],[267,293],{"id":11265,"url":11266,"alt":11267,"width":1218,"height":1219,"mimeType":1220,"localizedAlt":11268},"media-industry-water","\u002Fimages\u002Findustries\u002Fwater-wastewater-monitoring-v2.png","Illustrative wastewater inspection scene: a technician holds a portable gas detector and lowers a sampling probe through an open access hatch.",{"zh-CN":11269},"污水巡检示意场景：技术人员手持便携式气体检测仪，把采样探杆从打开的检修口放下去。",[11271,11550],{"market":315,"locale":316,"publication":11272,"displayName":1028,"h1":11273,"intro":11274,"sections":11275,"faq":11531,"seo":11544,"cardSummary":11547,"pagePresentation":11548},{"status":663,"indexable":10},"水务与污水处理运行中的气体监测","污水收集湿井、污泥处理、消化池沼气管线和化学品投加间需要不同的气体监测规格。请让所需气体和量程与每个位置和作业相匹配，再选择便携式、固定式或抽取式设备。规格中应包含采样条件、完整的样气路径以及所需的报警响应。",[11276,11323,11351,11409,11442,11487,11507],{"id":11277,"heading":11278,"paragraphs":11279,"links":11282,"navLabel":11303,"table":11304},"ww01-01","按工艺区域选择气体",[11280,11281],"湿井、消化池沼气管线和化学品投加间面临的监测任务各不相同。请从工艺物料清单和每个位置的作业入手，再确定需要同时测量的气体、量程和项目。","人员防护测量的是人员可能暴露处的空气；工艺分析表征的是一股确定的气流。确定仪器规格时请将两种目标分开，因为所需的浓度单位和采样条件可能不同。",[11283,11288,11293,11298],{"id":11284,"label":11285,"target":11286},"ww01-01-scottish-guidance","苏格兰污水处理守则：工艺气体及其来源（第 7.0–7.3 节）",{"kind":5558,"sourceId":11287},"scottish-wwtw-odour-code",{"id":11289,"label":11290,"target":11291},"ww01-01-who-treatment","WHO：水处理化学品（附件 5）",{"kind":5558,"sourceId":11292},"who-water-treatment-annex5-2022",{"id":11294,"label":11295,"target":11296},"ww01-01-digester-risk","英国环境署：污水污泥消化池的风险",{"kind":5558,"sourceId":11297},"ea-sewage-sludge-digester-risk",{"id":11299,"label":11300,"target":11301},"ww01-01-osha-equipment","OSHA 技术手册：多气体监测与环境条件",{"kind":5558,"sourceId":11302},"osha-otm-direct-reading-equipment","监测目标",{"caption":11305,"headers":11306,"rows":11309,"referenceLinkId":11284,"note":11322},"工艺区域与监测要求",[10622,11307,11308],"需评估的气体","需说明的条件",[11310,11314,11318],[11311,11312,11313],"收集与污泥处理","评估中确定的 H₂S、甲烷（CH₄）和氧气（O₂）。","进水组分、停留时间、受扰动的污泥以及通风。",[11315,11316,11317],"消化池沼气处理","CH₄、二氧化碳（CO₂）和 H₂S；区分工艺分析与环境泄漏监测。","样气压力、湿度以及所需的浓度单位。",[11319,11320,11321],"化学品投加与消毒","使用时的 Cl₂、ClO₂ 或 O₃；为氯胺消毒供应 NH₃ 时的 NH₃。","化学品库存、释放点，以及在储存或投加设备附近的作业。","以上为评估示例，并非规定的气体组合。下方来源涵盖污水处理工艺、消化池风险与水处理化学品。",{"id":11324,"heading":11325,"paragraphs":11326,"links":11329,"navLabel":11334,"table":11335},"ww01-02","复核停留时间、紊流与作业变化",[11327,11328],"污水在厌氧条件下停留，可能发生腐化并产生恶臭气体。在进水构筑物和溢流堰处，紊流会把挥发性化合物带入空气；污泥储存与处理还会形成更多需要复核的位置。","释放条件会随进水组分、停留时间和正在进行的作业而变化。请在现场平面图上标出相关位置，并说明泵送、污泥处理、清理和化学品变更，使监测方案反映这些条件。",[11330],{"id":11331,"label":11332,"target":11333},"ww01-02-scottish-guidance","苏格兰污水处理守则：腐化与紊流释放点（第 7 节）",{"kind":5558,"sourceId":11287},"作业与条件",{"caption":11336,"headers":11337,"rows":11340,"referenceLinkId":11331,"note":11350},"把释放条件与监测规格对应起来",[11338,11339],"需复核的条件","所需信息",[11341,11344,11347],[11342,11343],"停留与进水","确认储存的污水、外来污泥以及进水废物的变化。",[11345,11346],"紊流位置","标出进水构筑物、溢流堰及其他受扰动的液面。",[11348,11349],"作业活动","说明每个位置的污泥处理、清理与维护作业。","苏格兰污水处理恶臭守则列出了这些工艺来源。恶臭评估不能替代作业场所的气体监测。",{"id":11352,"heading":11353,"paragraphs":11354,"links":11358,"navLabel":11390,"table":11391},"ww01-03","让采样方式与作业相匹配",[11355,11356,11357],"请根据必须测量的位置选择采样方式，而不是只看检测器类别。下表区分了人员附近的空气、需远程到达的点、固定位置和抽取的工艺样气。","MS104K-M 支持扩散式采样，并随附外置泵。MS400-S 内置泵，并可切换为扩散式。请对照采样位置和所需气体，对比完整的配置——仪器、泵、探杆与管路。","对于受其覆盖的美国一般工业许可空间，OSHA 29 CFR 1910.146 将气体检测纳入雇主的进入管理方案。确定远程检测时，请同时考虑样气输送和仪器响应。受限空间应用页面单独说明该作业。",[11359,11362,11366,11369,11374,11379,11383,11386],{"id":11360,"label":997,"target":11361},"ww01-03-link-01",{"kind":5585,"path":48},{"id":11363,"label":11364,"target":11365},"ww01-03-link-02","受限空间气体检测",{"kind":5585,"path":40},{"id":11367,"label":1012,"target":11368},"ww01-03-link-03",{"kind":5585,"path":35},{"id":11370,"label":11371,"target":11372},"ww01-03-link-04","OSHA 29 CFR 1910.146（美国许可受限空间标准）",{"kind":5558,"sourceId":11373},"osha-1910-146",{"id":11375,"label":11376,"target":11377},"ww01-03-link-05","OSHA 1910.146 附录 B：气体检测程序",{"kind":5558,"sourceId":11378},"osha-1910-146-appendix-b",{"id":11380,"label":11381,"target":11382},"ww01-03-link-06","MS104K-M",{"kind":5585,"path":200},{"id":11384,"label":10277,"target":11385},"ww01-03-link-07",{"kind":5585,"path":212},{"id":11387,"label":11388,"target":11389},"ww01-03-osha-equipment","OSHA 技术手册：扩散式与远程泵吸采样",{"kind":5558,"sourceId":11302},"监测任务",{"caption":11392,"headers":11393,"rows":11395,"referenceLinkId":11387,"note":11408},"让监测任务与采样位置相匹配",[11390,11394],"需确定的测量",[11396,11399,11402,11405],[11397,11398],"个人监测","作业期间人员附近的空气。",[11400,11401],"远程气体检测","通过拟用探杆和采样管路到达的指定点。",[11403,11404],"固定监测","两次巡检之间需要监测的选定位置。",[11406,11407],"抽取式监测","确定的采样点及到仪器的完整路径。","各作业的具体指导请见下方应用链接。选择采样方式前，请评估采样条件与响应。",{"id":11410,"heading":11411,"paragraphs":11412,"links":11415,"navLabel":11425,"table":11426},"ww01-04","记录位置、运行状态和测量类型",[11413,11414],"NIOSH 2025 年对一座州立污水处理厂的报告记录到，OPS 18 号楼内的 H₂S 点测读数为 0.15–0.56 ppm。当时该厂以一半负荷运行，报告将结论限定于评估当天和所评估的位置。","请在每个结果旁记录采样位置、时间与运行状态，以便日后复核时区分例行巡检与维护或工艺变更。点测读数、记录的峰值和班次平均值要分开保存；它们回答的是不同的问题。选择仪器或控制器前，请确定所需的记录间隔和报警历史。",[11416,11421],{"id":11417,"label":11418,"target":11419},"ww01-04-niosh-field-report","NIOSH 2025 年污水处理现场调查：结果（B-7）；局限性（B-10）",{"kind":5558,"sourceId":11420},"niosh-2025-state-wastewater-field-report",{"id":11422,"label":11423,"target":11424},"ww01-04-h2s-record-review","H₂S 峰值高、TWA 低：复核监测记录",{"kind":5585,"path":270},"暴露记录",{"caption":11427,"headers":11428,"rows":11431,"referenceLinkId":11417,"note":11441},"让气体记录可被解读的信息",[11429,11430],"记录要素","需回答的问题",[11432,11435,11438],[11433,11434],"测量类型","这是点测读数、记录的峰值，还是规定时段内的平均值？",[11436,11437],"位置与运行状态","样气在哪里采集，当时哪些设备或作业在运行？",[11439,11440],"时间与报警历史","记录能否把读数或报警与相关作业对应起来？","NIOSH 的数据来自一次调查的观察结果，并非典型的厂内浓度或报警设定。其局限性见印刷版第 B-10 页。",{"id":11443,"heading":11444,"paragraphs":11445,"links":11449,"navLabel":11463,"table":11464,"pageNav":11484},"ww01-05","同时核对样气输送与预处理",[11446,11447,11448],"在 HSE 一项 50%LEL（爆炸下限的 50%）的测试中，一套检测器加采样管的配置对一种可燃蒸气达到 90% 响应用时超过 15 分钟；同一配置对甲烷标定气的响应不到 5 秒。这些是该测试的结果，并非 H₂S 延迟的估算；它们说明了目标气体和完整样气路径为何重要。","对于潮湿的采样点，请说明温度、湿度、压力、流量以及拟用管路的长度和材质。请针对目标气体评估可能的吸附、过滤器和冷凝液处理，因为样气到达仪器之前的损失或延迟都可能影响读数。","当项目需要样气预处理和在线监测时，TH-2000-C 是一个候选方案。请对照目标气体和样气条件确认拟定的处理环节，并在确定配置前评估完整路径的响应。",[11450,11454,11458],{"id":11451,"label":11452,"target":11453},"ww01-05-link-02","TH-2000-C 样气预处理与在线监测系统",{"kind":5585,"path":244},{"id":11455,"label":11456,"target":11457},"ww01-05-link-03","污水气体采样指南",{"kind":5585,"path":292},{"id":11459,"label":11460,"target":11461},"ww01-05-hse-sample-tube","HSE CEMHD1–2020：采样管吸附与响应",{"kind":5558,"sourceId":11462},"hse-cemhd1-2020-sample-tube","样气处理",{"caption":11465,"headers":11466,"rows":11469,"referenceLinkId":11459,"note":11482,"figure":11483},"抽取式样气路径示意",[11467,11468],"路径环节","需评估的问题",[11470,11473,11476,11479],[11471,11472],"采样点","明确位置、目标气体与样气条件。",[11474,11475],"管路与过滤器","核对拟用的长度、材质以及可能的样气损失。",[11477,11478],"样气预处理（如需要）","评估处理环节、冷凝液处理以及可能的 H₂S 损失。",[11480,11481],"检测器","结合完整的采样路径核对气体量程与响应。","此为概念性布置，并非 TH-2000-C 的配置图。处理环节取决于项目；连接线和箭头表示路径，不表示气体输送、损失或响应时间。","sample_path",{"label":11485,"activeThroughId":11486},"样气路径与集成","ww01-07",{"id":11488,"heading":11489,"paragraphs":11490,"links":11496,"navLabel":11506},"ww01-06","同时核对报警、接口与文件",[11491,11492,11493,11494,11495],"固定测量点可以向厂内的报警或控制系统提供信号。评估接口和控制器兼容性之前，请先确定预期的通知以及任何规定的联锁动作。","MIC-600 支持固定式扩散测量，可选泵吸或流通式配置，提供 4–20 mA、RS485 和继电器输出，本地声光报警为选配。请对照现场要求评估安装条件与采样方式。","在 NIOSH 对一起工业废水 H₂S 释放事件的调查中，地下室的监测仪没有报警，但上方作业区的暴露情况仍不明确。该报告涉及的是一家航空发动机服务设施，而非市政污水厂；它说明了为何必须同时评估检测器位置与受影响的作业区域。","请在项目验收方案中确定控制器响应、通知、故障指示与恢复。报价时，请商定安装与操作说明书、标定或出厂检测记录，以及适用的认证文件。","请对照确切的型号或配置、证书适用范围与条件以及相关检测结果核对每份文件。请商定由谁负责设备检查与维护，以及设施需要保留哪些记录。",[11497,11501],{"id":11498,"label":11499,"target":11500},"ww01-06-link-01","MIC-600",{"kind":5585,"path":192},{"id":11502,"label":11503,"target":11504},"ww01-06-niosh-incident","NIOSH 工业废水调查：检测器位置（印刷版第 11 页）",{"kind":5558,"sourceId":11505},"niosh-2014-industrial-wastewater-release","报警与文件",{"id":11486,"heading":11508,"paragraphs":11509,"checklist":11512,"links":11519,"cue":11529,"navLabel":11530},"准备监测项目询价",[11510,11511],"请说明监测任务、采样条件与所需的响应。选定型号之前，可以先发送现有信息。我们的技术团队可以对照这些要求评审拟定的配置、采样附件与文件。","请使用下方清单准备项目信息，询价指南解释了这些输入。H₂S 询价链接用于这一特定需求；范围更广的气体监测项目请使用页面上的询价按钮。",[11513,11514,11515,11516,11517,11518],"国家和州／省、设施、位置与作业任务。","测量介质与目标：个人、固定点、工艺或恶臭调查。","已知的所需气体、量程以及同时监测的需求。","环境条件、采样路径以及计划中的样气处理。","所需的记录、报警、接口以及现有控制器的信息。","买方指定的文件、证书、安装要求与服务需求。",[11520,11523],{"id":11521,"label":1061,"target":11522},"ww01-07-link-01",{"kind":5585,"path":266},{"id":11524,"label":11525,"target":11526},"ww01-07-link-02","沟通您的污水 H₂S 监测需求",{"kind":5585,"path":300,"query":11527},{"type":7748,"context":11528,"gasRequirements":10761,"source":79},"污水 H₂S 监测需求","技术团队","项目询价",[11532,11536,11540],{"id":11533,"question":11534,"answer":11535},"water-humid-sample","为什么潮湿的污水样气需要特别注意？","因为样气管路一旦把样气冷却到露点以下，其中的水汽就会冷凝，而氨（以及程度较轻的 H₂S）会溶入冷凝水，所以抽取式分析仪可能在看似正常工作的同时读数偏低。做法是在到达一级受控干燥环节之前，让样气始终保持在露点以上，并在探杆进口处通入标定气，检查整条样气路径。“相关指南”中的污水气体采样指南说明了可选方案及其依据。",{"id":11537,"question":11538,"answer":11539},"water-confined-space","区域监测和受限空间作业监测是一回事吗？","不是。区域监测针对一个确定的位置或区域进行监视；进入监测是基于作业的流程，包括进入前检测和持续检测。产品与采样方式应依据具体目标确定。",{"id":11541,"question":11542,"answer":11543},"water-conditioning-choice","水务或污水采样点在什么情况下需要评估样气预处理？","只要样气到达仪器时可能超出其规定条件，例如湿度超过额定值、温度高于额定值、夹带粉尘或液体，或处于正压或抽吸状态，就需要评估。从加盖池体、湿井或风管抽取的空气，应对照这些限值核查。请提供样气温度、湿度、压力、颗粒物情况和管路走向。随后针对目标气体选择处理环节，并用这些气体通过整条样气路径进行检查；干燥处理并不会自动保留 H₂S。选择 TH-2000-C 或其他系统之前，请先确认处理环节。",{"title":11545,"description":11546},"水与污水行业的气体检测与监测","为湿井、消化池和化学品投加间确定气体监测规格。对比 H₂S、CH₄、O₂ 以及现场特定水处理化学品的采样方式。","先从监测任务入手，再复核采样条件、检测器选型与报警响应。本指南把这些输入与水务或污水项目所需的设备和文件对应起来。",{"productCardLayout":11549},"compact",{"market":17,"locale":18,"publication":11551,"displayName":11552,"h1":11553,"intro":11554,"sections":11555,"faq":11773,"seo":11783,"cardSummary":11786,"pagePresentation":11787},{"status":663,"indexable":10},"Water & Wastewater","Gas Monitoring for Water and Wastewater Operations","Collection wet wells, sludge handling, digester gas lines and chemical dosing rooms need different gas-monitoring specifications. Match the required gases and measuring ranges to each location and task, then choose portable, fixed or extractive equipment. Include sampling conditions, the complete sample path and the required alarm response in the specification.",[11556,11595,11621,11668,11697,11735,11750],{"id":11277,"heading":11557,"paragraphs":11558,"links":11561,"navLabel":11574,"table":11575},"Choose gases for each process area",[11559,11560],"A wet well, a digester gas line and a chemical dosing room do not present the same monitoring task. Start with the process inventory and the work at each location, then define the gases, ranges and measurements needed at the same time.","Worker protection measures the atmosphere where people may be exposed; process analysis characterizes a defined gas stream. Keep those objectives separate when specifying instruments, because the required concentration units and sampling conditions can differ.",[11562,11565,11568,11571],{"id":11284,"label":11563,"target":11564},"Scottish wastewater code: Process gases and sources, Sections 7.0–7.3",{"kind":5558,"sourceId":11287},{"id":11289,"label":11566,"target":11567},"WHO: Water-treatment chemicals, Annex 5",{"kind":5558,"sourceId":11292},{"id":11294,"label":11569,"target":11570},"Environment Agency: Sewage-sludge digester risks",{"kind":5558,"sourceId":11297},{"id":11299,"label":11572,"target":11573},"OSHA Technical Manual: Multigas monitoring and environmental conditions",{"kind":5558,"sourceId":11302},"Monitoring objectives",{"caption":11576,"headers":11577,"rows":11581,"referenceLinkId":11284,"note":11594},"Process areas and monitoring requirements",[11578,11579,11580],"Process area","Gases to assess","Conditions to specify",[11582,11586,11590],[11583,11584,11585],"Collection and sludge handling","H₂S, methane (CH₄) and oxygen (O₂), as identified in the assessment.","Influent composition, retention, disturbed sludge and ventilation.",[11587,11588,11589],"Digester gas handling","CH₄, carbon dioxide (CO₂) and H₂S; distinguish process analysis from ambient leak monitoring.","Sample pressure, moisture and the required concentration units.",[11591,11592,11593],"Chemical feed and disinfection","Cl₂, ClO₂ or O₃ where used; NH₃ where supplied for chloramination.","Chemical inventory, release points and work near storage or dosing equipment.","These are assessment examples, not a prescribed gas combination. The sources below cover wastewater processes, digester risks and water-treatment chemicals.",{"id":11324,"heading":11596,"paragraphs":11597,"links":11600,"navLabel":11604,"table":11605},"Review retention, turbulence and changes in the work",[11598,11599],"Sewage can become septic when retained under anaerobic conditions, allowing odorous gases to form. At inlet works and overflow weirs, turbulence can transfer volatile compounds into the air; sludge storage and handling create further locations to review.","Release conditions can change with influent composition, retention time and the work underway. Mark the relevant locations on the site plan and describe pumping, sludge handling, cleaning and chemical changes so the monitoring proposal reflects those conditions.",[11601],{"id":11331,"label":11602,"target":11603},"Scottish wastewater code: Septicity and turbulent release points, Section 7",{"kind":5558,"sourceId":11287},"Work and conditions",{"caption":11606,"headers":11607,"rows":11610,"referenceLinkId":11331,"note":11620},"Connect release conditions with the monitoring specification",[11608,11609],"Condition to review","Information needed",[11611,11614,11617],[11612,11613],"Retention and influent","Identify stored sewage, imported sludge and changes in incoming waste.",[11615,11616],"Turbulent locations","Mark inlet works, overflow weirs and other disturbed liquid surfaces.",[11618,11619],"Work activity","Describe sludge handling, cleaning and maintenance at each location.","The Scottish wastewater odour code identifies these process sources. Odour assessment does not replace workplace gas monitoring.",{"id":11352,"heading":11622,"paragraphs":11623,"links":11627,"navLabel":11648,"table":11649},"Match the sampling arrangement to the work",[11624,11625,11626],"Choose the sampling arrangement from the location that must be measured, rather than from the detector category alone. The table distinguishes air near the worker, a remotely reached point, a fixed location and an extracted process sample.","MS104K-M supports diffusion sampling and is supplied with an external pump. MS400-S has a built-in pump and can switch to diffusion. Compare the complete arrangement—instrument, pump, probe and line—against the sampling locations and required gases.","For covered US general-industry permit spaces, OSHA 29 CFR 1910.146 places atmospheric testing within the employer’s entry program. Allow for both sample transport and instrument response when defining remote testing. The confined-space application explains that task separately.",[11628,11631,11634,11636,11638,11641,11643,11645],{"id":11360,"label":11629,"target":11630},"Personal gas monitoring",{"kind":5585,"path":48},{"id":11363,"label":11632,"target":11633},"Confined-space atmospheric testing",{"kind":5585,"path":40},{"id":11367,"label":10992,"target":11635},{"kind":5585,"path":35},{"id":11370,"label":5405,"target":11637},{"kind":5558,"sourceId":11373},{"id":11375,"label":11639,"target":11640},"OSHA 1910.146 Appendix B: Procedures for atmospheric testing",{"kind":5558,"sourceId":11378},{"id":11380,"label":11381,"target":11642},{"kind":5585,"path":200},{"id":11384,"label":10277,"target":11644},{"kind":5585,"path":212},{"id":11387,"label":11646,"target":11647},"OSHA Technical Manual: Diffusion and remote pumped sampling",{"kind":5558,"sourceId":11302},"Monitoring tasks",{"caption":11650,"headers":11651,"rows":11654,"referenceLinkId":11387,"note":11667},"Match the monitoring task to the sampling location",[11652,11653],"Monitoring task","Measurement to define",[11655,11658,11661,11664],[11656,11657],"Personal monitoring","Air close to the worker during the work.",[11659,11660],"Remote atmospheric testing","An identified point reached through a proposed probe and sampling line.",[11662,11663],"Fixed monitoring","Selected locations that need monitoring between inspection rounds.",[11665,11666],"Extractive monitoring","A defined sample point and the complete path to the instrument.","Use the application links below for task-specific guidance. Assess sampling conditions and response before selecting the arrangement.",{"id":11410,"heading":11669,"paragraphs":11670,"links":11673,"navLabel":11680,"table":11681},"Record location, operating state and measurement type",[11671,11672],"NIOSH’s 2025 report on a state-operated wastewater plant recorded H₂S spot readings of 0.15–0.56 ppm inside OPS Building 18. The plant was operating at half capacity, and the report limits its findings to the locations and day assessed.","Record the sampling location, time and operating state alongside each result so later reviews can distinguish routine rounds from maintenance or process changes. Keep spot readings, logged peaks and shift averages separate; they answer different questions. Define the recording interval and alarm history needed before selecting the instrument or controller.",[11674,11677],{"id":11417,"label":11675,"target":11676},"NIOSH 2025 wastewater field investigation: Results B-7; limitations B-10",{"kind":5558,"sourceId":11420},{"id":11422,"label":11678,"target":11679},"High H₂S peak, low TWA: review the monitoring records",{"kind":5585,"path":270},"Exposure records",{"caption":11682,"headers":11683,"rows":11686,"referenceLinkId":11417,"note":11696},"Information that makes a gas record interpretable",[11684,11685],"Record element","Question to resolve",[11687,11690,11693],[11688,11689],"Measurement type","Is this a spot reading, a logged peak or an average over a stated period?",[11691,11692],"Location and operating state","Where was the sample taken, and what equipment or work was active?",[11694,11695],"Time and alarm history","Can the record connect a reading or alarm with the relevant task?","The NIOSH figures are observations from one investigation, not typical plant concentrations or alarm settings. Its limitations are on printed page B-10.",{"id":11443,"heading":11698,"paragraphs":11699,"links":11703,"navLabel":11713,"table":11714,"pageNav":11733},"Check sample transport and conditioning together",[11700,11701,11702],"In an HSE test at 50%LEL, a detector-and-tube arrangement took over 15 minutes to reach 90% response to a flammable vapour. The same arrangement responded to methane calibration gas in under 5 seconds. These are results for that test, not H₂S delay estimates; they show why the target gas and complete sample path matter.","For wet sample points, specify temperature, moisture, pressure, flow and the proposed tubing length and material. Assess possible adsorption, filters and condensate handling against the target gases, because losses or delays can affect the reading before the sample reaches the instrument.","TH-2000-C is a candidate where a project requires sample conditioning and online monitoring. Confirm the proposed treatment stages against the target gases and sample conditions, and assess complete-path response before agreeing the configuration.",[11704,11707,11710],{"id":11451,"label":11705,"target":11706},"TH-2000-C sample-conditioning and online monitoring system",{"kind":5585,"path":244},{"id":11455,"label":11708,"target":11709},"Wastewater gas sampling guide",{"kind":5585,"path":292},{"id":11459,"label":11711,"target":11712},"HSE CEMHD1–2020: Sample-tube adsorption and response",{"kind":5558,"sourceId":11462},"Sample handling",{"caption":11715,"headers":11716,"rows":11719,"referenceLinkId":11459,"note":11732,"figure":11483},"Conceptual extracted-sample path",[11717,11718],"Part of the path","Question to evaluate",[11720,11723,11726,11729],[11721,11722],"Sampling point","Identify the location, target gases and sample conditions.",[11724,11725],"Tubing and filters","Check the proposed length, materials and possible sample losses.",[11727,11728],"Sample conditioning, if required","Assess treatment stages, condensate handling and possible H₂S loss.",[11730,11731],"Detector","Check the gas range and response with the complete sampling path.","Conceptual arrangement, not a TH-2000-C configuration drawing. Treatment stages depend on the project; connections and arrows show the path, not gas transport, loss or response time.",{"label":11734,"activeThroughId":11486},"Sample path & integration",{"id":11488,"heading":11736,"paragraphs":11737,"links":11743,"navLabel":11749},"Check alarms, interfaces and documentation together",[11738,11739,11740,11741,11742],"A fixed measurement point can feed the plant warning or control system. Define the expected notifications and any specified interlock actions before assessing interfaces and controller compatibility.","MIC-600 supports fixed diffusion measurement, with optional pumped or flow-through arrangements. It provides 4–20 mA, RS485 and relay outputs. Local audible and visual alarms are optional. Assess mounting conditions and sampling mode against the site requirements.","In a NIOSH investigation of an industrial wastewater H₂S release, basement monitors did not alarm, but exposure conditions in the work area above remained uncertain. The report concerns an aircraft-engine services facility, not a municipal plant; it illustrates why detector location and the affected work area must be assessed together.","Define controller response, notifications, fault indication and recovery in the project acceptance plan. At quotation, agree the installation and operating instructions, calibration or factory test records, and applicable certification documents.","Check each document against the exact model or configuration, certificate scope and conditions, and relevant test results. Agree who will perform equipment checks and maintenance, and which records the facility will retain.",[11744,11746],{"id":11498,"label":11499,"target":11745},{"kind":5585,"path":192},{"id":11502,"label":11747,"target":11748},"NIOSH industrial wastewater investigation: Detector location, printed page 11",{"kind":5558,"sourceId":11505},"Alarms and documents",{"id":11486,"heading":11751,"paragraphs":11752,"checklist":11755,"links":11762,"cue":11771,"navLabel":11772},"Prepare the monitoring project inquiry",[11753,11754],"Share the monitoring task, sampling conditions and required response. You can send the information already available before selecting a model. Our technical team can review the proposed configuration, sampling accessories and documentation against those requirements.","Use the checklist below to prepare the project details. The quotation guide explains those inputs. The H₂S inquiry link is for that specific requirement; use the page inquiry button for a broader gas-monitoring project.",[11756,11757,11758,11759,11760,11761],"Country and state, facility, location and work task.","Measurement medium and objective: personal, fixed-point, process or odor investigation.","Required gases, measuring ranges and simultaneous-monitoring needs, where known.","Environmental conditions, sampling path and any planned sample treatment.","Required records, alarms, interfaces and existing controller details.","Buyer-specified documents, certificates, installation requirements and service needs.",[11763,11765],{"id":11521,"label":11217,"target":11764},{"kind":5585,"path":266},{"id":11524,"label":11766,"target":11767},"Discuss your wastewater H₂S monitoring requirement",{"kind":5585,"path":300,"query":11768},{"type":7748,"context":11769,"gasRequirements":11770,"source":79},"Wastewater H2S monitoring requirements","Hydrogen sulfide (H2S)","Technical Team","Project inquiry",[11774,11777,11780],{"id":11533,"question":11775,"answer":11776},"Why does a humid wastewater sample require special attention?","Because its water condenses wherever the sample line cools it below its dew point, and ammonia, and to a lesser degree H₂S, dissolve in that condensate, so an extractive analyzer can read low while appearing to work. The sample is kept above its dew point up to one controlled drying stage, and the complete path is checked with calibration gas at the probe inlet. The wastewater gas sampling guide under Related guidance explains the options and the evidence.",{"id":11537,"question":11778,"answer":11779},"Is area monitoring the same as confined-space entry monitoring?","No. Area monitoring watches a defined location or zone. Entry monitoring is a task-based workflow that includes pre-entry and ongoing checks. The product and sampling method should follow the specific objective.",{"id":11541,"question":11781,"answer":11782},"When should a water or wastewater sample point be assessed for sample conditioning?","Whenever the sample can reach the instrument outside its specified conditions, for example above its humidity rating, hotter than its rating, carrying dust or liquid, or under pressure or suction. Air drawn from a covered tank, wet well or duct should be checked against these limits. Provide the sample temperature, moisture, pressure, particulates and line route. The treatment stages are then chosen for the target gases and checked with those gases through the complete path; drying does not automatically preserve H₂S. Confirm the stages before selecting TH-2000-C or another system.",{"title":11784,"description":11785},"Water & Wastewater Gas Detection and Monitoring","Specify gas monitoring for wet wells, digesters and chemical dosing rooms. Compare sampling arrangements for H₂S, CH₄, O₂ and site-specific treatment chemicals.","Start with the monitoring task, then review sampling conditions, detector selection and alarm response. The guide connects these inputs with the equipment and documents needed for a water or wastewater project.",{"productCardLayout":11549},[],{"value":11790},[11791,12144,12275,12355],{"id":49,"slug":994,"gasIds":11792,"industryIds":11793,"productCategoryIds":11794,"resourceIds":11795,"media":11796,"marketContent":11802,"sources":12143},[1980,64,1987],[72,76,80],[117],[267],{"id":11797,"url":11798,"alt":11799,"width":4183,"height":4184,"mimeType":705,"localizedAlt":11800},"media-application-personal","\u002Fimages\u002Fapplications\u002Feranntex-ms104k-s2-personal-gas-monitoring-20260921.webp","Illustrative personal gas monitoring scene with an Eranntex BTYQ-MS104K-S2 detector worn on a technician's upper chest.",{"zh-CN":11801},"个人气体监测示意场景：技术人员在上胸部佩戴逸云天 BTYQ-MS104K-S2 检测仪。",[11803,11988],{"market":315,"locale":316,"publication":11804,"displayName":997,"h1":11805,"h1Lines":11806,"intro":11808,"sections":11809,"faq":11972,"seo":11985},{"status":663,"indexable":10},"个人气体监测与便携式检测仪选型",[997,11807],"与便携式检测仪选型","个人气体监测仪对作业人员附近的空气进行采样。选型时，需要让所需气体、佩戴位置和日常检查与作业相匹配。可借助本指南对比采样方式、记录需求与便携式检测仪，再准备团队所需的设备与文件。",[11810,11846,11862,11882,11913,11940],{"id":11811,"heading":11812,"paragraphs":11813,"links":11817,"navLabel":11830,"table":11831},"pg02-01","按作业选择气体与量程",[11814,11815,11816],"现场的危害与监测要求决定所需的气体与量程。请记录相关物质、作业任务与运行条件，以便据此核对拟定的配置。","当评估后的作业只需要该项测量时，单气体监测仪是一种选择。如果还需要监测其他气体或氧气状况，设备必须覆盖这些测量。请说明哪些测量需要同时进行；支持的气体清单并不代表一台仪器内的配置。","如果作业涉及需许可的受限空间，设备选型只是更大范围的进入管理方案的一部分。OSHA 29 CFR 1910.146 适用于美国一般工业中受其覆盖的作业。受限空间应用页面单独说明该作业；选定检测仪并不等于完成了进入评估。",[11818,11821,11825],{"id":11819,"label":11371,"target":11820},"pg02-01-link-2",{"kind":5558,"sourceId":11373},{"id":11822,"label":11823,"target":11824},"pg02-01-confined-task","受限空间采样要求",{"kind":5585,"path":40},{"id":11826,"label":11827,"target":11828},"pg02-01-monitor-evaluation","NIOSH：测量范围与监测仪评估",{"kind":5558,"sourceId":11829},"niosh-2012-162-direct-reading-monitors","气体与量程",{"caption":11832,"headers":11833,"rows":11836,"referenceLinkId":11826,"note":11845},"监测任务的配置输入",[11834,11835],"规格输入项","需说明的要求",[11837,11840,11843],[11838,11839],"目标气体","列出为该监测任务确定的气体。",[11841,11842],"同时测量","说明哪些气体需要同时监测。",[8180,11844],"为每种所需气体注明量程与单位。","订购前，请对照资料记载的选项与运行条件确认拟定的组合。",{"id":11847,"heading":11848,"paragraphs":11849,"links":11853,"navLabel":11861},"pg02-02","让采样点与监测任务相匹配",[11850,11851,11852],"进行个人监测时，采样口需要接触到作业人员呼吸带附近的空气。请结合作业中使用的服装、安全带及其他装备核对佩戴方式。认可的佩戴位置与附件以仪器说明书为准；遮挡采样口会妨碍气体进入。","远程采样管从其自身的进气口抽取空气，因此样气可能与手持仪器人员附近的空气不同。选择采样方式前，请先明确需要监测的位置。需要远程采样时由泵提供支持，但并非每台个人监测仪都必须配泵。","管路、过滤器与湿气可能影响远程样气及其到达仪器所需的时间。NIOSH 介绍了一种评估样气损失的方法：用已知浓度的气体分别直接测量和经采样管路测量，再进行比较。该评估只适用于所测试的气体和路径；相关的远程检测作业请参阅受限空间指南。",[11854,11857],{"id":11855,"label":11823,"target":11856},"pg02-02-link-1",{"kind":5585,"path":40},{"id":11858,"label":11859,"target":11860},"pg02-02-link-5","NIOSH: Components for Evaluation of Direct-Reading Monitors for Gases and Vapors（中译：NIOSH：气体与蒸气直读式监测仪的评估要素）",{"kind":5558,"sourceId":11829},"佩戴与采样",{"id":11863,"heading":11864,"paragraphs":11865,"links":11870,"quotations":11876,"navLabel":11881},"pg02-03","了解使用前检查能确认什么",[11866,11867,11868,11869],"检测仪在发放使用前，需要具备正常的气体响应与报警功能。OSHA 的检测公告采纳了 ISEA 的建议：每天使用前按制造商说明进行冲击测试或标定检查。","冲击测试检查气体能否进入以及报警功能是否正常。标定检查将读数与已知浓度的测试气体对比，看是否在制造商规定的公差内。完整标定则会调整响应。记录所做的是哪一种检查，结果才能为下一位负责该仪器的人员所用。","该公告要求在冲击测试或标定检查未通过后进行完整标定。完整标定仍未通过的仪器应停止使用。规定的测试气体、减压阀、管路与适配器都应纳入这些检查的准备工作。","在设备选型和培训中都需要关注报警能否被识别。工作服、听力防护与现场噪声都会影响佩戴者察觉警报。请在这种实际条件下评估可用的报警信号，并按现场程序进行响应。",[11871],{"id":11872,"label":11873,"target":11874},"pg02-03-link-1","OSHA: Calibrating and Testing Direct-Reading Monitors, SHIB 11-26-2024（中译：OSHA：直读式监测仪的标定与测试）",{"kind":5558,"sourceId":11875},"osha-shib-direct-reading-monitors-2024",[11877],{"text":11878,"afterParagraph":1972,"referenceLinkId":11872,"locator":11879,"translation":11880},"The bump test or function check does not provide a measure of the instrument's accuracy.","Bump Test (or Function Check) · SHIB 11-26-2024 · 美国咨询性指南","冲击测试或功能检查并不能衡量仪器的准确度。","使用前检查",{"id":11883,"heading":11884,"paragraphs":11885,"links":11888,"navLabel":11896,"table":11897},"pg02-04","选择能回答团队问题的记录",[11886,11887],"先确定团队需要从记录中了解什么。调查一次报警，可能需要时间、事件前后的读数以及当时进行的作业；复核一个班次，则可能需要更长的历史记录。不同的问题对应对记录间隔、事件细节和导出格式的不同核查。","选择仪器前，请了解它如何记录，而不只是能存多少。以 MS104K-S2 为例：存储间隔可设置，记录可在仪器上查看、删除和导出；存储满后停止记录，而不是覆盖旧记录。因此下载和清理记录应纳入班次的例行工作。报警记录的内容与导出格式按项目设定，请在询价中说明团队需要哪些数值，以及每条记录须如何与仪器、时间和作业日志对应。",[11889,11893],{"id":11890,"label":11891,"target":11892},"pg02-04-niosh-records","NIOSH：接触限值定义（第 6 页）；数据处理（第 25 页）",{"kind":5558,"sourceId":11829},{"id":11894,"label":11423,"target":11895},"pg02-04-h2s-record-review",{"kind":5585,"path":270},"监测记录",{"caption":11898,"headers":11899,"rows":11902,"referenceLinkId":11890,"note":11912},"接触限值（也称暴露限值）术语与需复核的记录",[11900,11901],"术语","记录复核时要回答的问题",[11903,11906,11909],[11904,11905],"TWA","在适用的参考时段内，时间加权平均值是多少？",[11907,11908],"STEL","短时间平均值是否超过适用的短时间限值？",[11910,11911],"最高限值（Ceiling）","在其规定的测量条件下，接触水平是否超过最高限值？","请使用适用的限值及其规定的平均时段或测量时段。短暂的峰值本身并不是 STEL 计算。请核对仪器记录哪些数值以及如何计算。",{"id":11914,"heading":11915,"paragraphs":11916,"links":11921,"navLabel":11939},"pg02-05","对比完整的作业装备",[11917,11918,11919,11920],"请对比各候选型号的采样方式。MS104K-S2 为一至两种气体提供扩散式监测；MS104K-M 将扩散式与标配外置泵结合，用于远程检测；MS400-S 内置泵，并可切换为扩散式。请对比每套完整装备与作业的契合度，包括在个人监测与远程采样之间切换的情况。","然后对比佩戴与运行条件。表中在数值旁保留了资料记载的重量与续航条件。不同模式或气体配置下的续航数据不能直接排名。请让预期使用时长与可用的充电时间相匹配；作业包括远程采样时，请把泵也计算在内。","作业装备还包括日常检查与维护所需的物品。请确认兼容的测试气体、减压阀与标定适配器，再确认作业所需的探杆、管路、过滤器或携带附件。请区分随机提供的物品与需要补充的耗材。规划这些供应时，请核对测试气体的有效期以及维护说明。","请将防护等级与工作限值和清洁说明一并阅读。仅凭 IP 等级，不能确定其适用于特定的冲洗或冷凝条件。交接时，请明确仪器身份、充电安排和必需的检查，以便下一班次准备同样的作业装备。",[11922,11926,11929,11932,11935],{"id":11923,"label":11924,"target":11925},"pg02-05-link-1","便携式气体检测设备",{"kind":5585,"path":116},{"id":11927,"label":11381,"target":11928},"pg02-02-link-2",{"kind":5585,"path":200},{"id":11930,"label":10277,"target":11931},"pg02-02-link-3",{"kind":5585,"path":212},{"id":11933,"label":10273,"target":11934},"pg02-05-s2-product",{"kind":5585,"path":208},{"id":11936,"label":11937,"target":11938},"pg02-05-osha-supplies","OSHA：测试气体供应与兼容设备（Calibration Rules）",{"kind":5558,"sourceId":11875},"设备对比",{"id":11941,"heading":11942,"paragraphs":11943,"checklist":11947,"cue":11529,"links":11953,"navLabel":11971},"pg02-06","核对文件并准备设备询价",[11944,11945,11946],"请用文件核对所报的设备。操作说明书应涵盖拟定的型号、采样方式、附件与维护条件。检测或标定记录应标明仪器身份，并说明相关的检测条件与结果。这样接收方才能把记录与收到的设备对应起来。","需要危险场所认证时，请对照项目要求核对证书记录、所覆盖的型号或配置以及规定的条件。公司资质或其他型号的文件并不能证明这一适用范围。请将适用的文件与仪器的维护履历一并保存。","请把作业描述和已知要求发送给逸云天。没有型号或完整规格也可以先开始。我们的技术团队可以根据这些信息，协助对比气体配置、采样附件与文件。报价应写明所选的气体、量程和约定的项目，以便订购前核对设备与文件包。",[11948,11515,11949,11950,11951,11952],"国家和州／省、设施、作业任务与经过的区域。","个人监测与远程采样作业，包括采样点与距离。","班次时长、环境条件与充电安排。","报警、数据记录与通讯要求。","数量、维护安排，以及所需的操作、检测与认证文件。",[11954,11957,11963,11967],{"id":11955,"label":1061,"target":11956},"pg02-06-link-1",{"kind":5585,"path":266},{"id":11958,"label":11959,"target":11960},"pg02-06-link-2","沟通您的个人气体监测需求",{"kind":5585,"path":300,"query":11961},{"type":7748,"context":11962,"source":48},"个人气体监测设备需求",{"id":11964,"label":11965,"target":11966},"pg02-06-niosh-documents","NIOSH：设备文件（印刷版第 22–24 页）",{"kind":5558,"sourceId":11829},{"id":11968,"label":11969,"target":11970},"pg02-06-chemical-guide","化工行业指南",{"kind":5585,"path":71},"文件与询价",[11973,11977,11981],{"id":11974,"question":11975,"answer":11976},"personal-question-1","什么情况下单气体监测仪就足够？","当作业场所评估只要求测量这一种气体，且量程和运行条件也合适时，可以选择单气体监测仪。如果还需要监测氧气、可燃气体或其他有毒气体，设备必须覆盖这些测量。选择配置前，请确认哪些气体需要一起监测。",{"id":11978,"question":11979,"answer":11980},"personal-question-2","个人气体监测一定需要泵吗？","不一定。当配置和佩戴方式适合作业时，扩散式可用于就地的个人监测。需要远程采样时由泵提供支持。采样管的进气口代表远程采样点，其空气可能与作业人员附近的空气不同。请按仪器说明书和现场程序确定模式、进气口位置与附件。",{"id":11982,"question":11983,"answer":11984},"personal-question-3","除了检测仪价格，还应对比哪些方面？","请对比完整的装备：气体配置、佩戴与采样方式、续航条件、充电、记录功能以及日常检查所需的物品。请用操作说明书、检测或标定记录以及所需的认证文件核对拟定的设备，并把耗材、培训与维护安排纳入采购决策。",{"title":11986,"description":11987},"使用便携式气体检测仪进行个人气体监测","按目标气体、量程、采样方式、本地报警以及现场文件要求，选择用于个人气体监测的便携式检测仪。",{"market":17,"locale":18,"publication":11989,"displayName":11990,"h1":11991,"h1Lines":11992,"intro":11994,"sections":11995,"faq":12130,"seo":12140},{"status":663,"indexable":10},"Personal Gas Monitoring","Personal Gas Monitoring and Portable Detector Selection",[11990,11993],"and Portable Detector Selection","A personal gas monitor samples air close to the worker. Choosing one means matching the required gases, wearing position and daily checks to the work. Use this guide to compare sampling arrangements, recording needs and portable detectors, then prepare the equipment and documents your team will need.",[11996,12028,12041,12056,12082,12103],{"id":11811,"heading":11997,"paragraphs":11998,"links":12002,"navLabel":12011,"table":12012},"Choose the gases and ranges for the work",[11999,12000,12001],"The hazards and monitoring requirements at your site determine the gases and measuring ranges. Record the substances, tasks and operating conditions so the proposed configuration can be checked against them.","A single-gas monitor is an option when the assessed task calls for that measurement. If other gases or oxygen conditions also need monitoring, the equipment must cover them. Specify which measurements are needed at the same time; a list of supported gases does not describe the configuration in one instrument.","Where the work includes a permit-required confined space, equipment selection is part of a wider entry program. OSHA 29 CFR 1910.146 applies to covered US general-industry work. The confined-space application explains that task separately; choosing a detector does not complete an entry assessment.",[12003,12005,12008],{"id":11819,"label":5405,"target":12004},{"kind":5558,"sourceId":11373},{"id":11822,"label":12006,"target":12007},"Confined-space sampling requirements",{"kind":5585,"path":40},{"id":11826,"label":12009,"target":12010},"NIOSH: measurement range and monitor evaluation",{"kind":5558,"sourceId":11829},"Gases and ranges",{"caption":12013,"headers":12014,"rows":12017,"referenceLinkId":11826,"note":12027},"Configuration inputs for the monitoring task",[12015,12016],"Specification input","Requirement to specify",[12018,12021,12024],[12019,12020],"Target gases","List the gases identified for the monitoring task.",[12022,12023],"Simultaneous measurements","State which gases must be monitored at the same time.",[12025,12026],"Measuring ranges","Specify the measuring range and unit for each required gas.","Confirm the proposed combination against the documented options and operating conditions before ordering.",{"id":11847,"heading":12029,"paragraphs":12030,"links":12034,"navLabel":12040},"Match the sampling point to the monitoring task",[12031,12032,12033],"For personal monitoring, the sampling inlet needs access to air near the worker's breathing zone. Check the wearing arrangement with the clothing, harness and other equipment used on the job. The instrument instructions determine the approved position and accessories; covering the inlet can restrict gas access.","A remote hose draws air from its own inlet, so the sample can differ from air near the person holding the instrument. Identify which location needs monitoring before choosing the sampling arrangement. A pump supports remote sampling when required; it is not a requirement for every personal monitor.","Tubing, filters and moisture can affect a remote sample and the time it takes to reach the instrument. NIOSH describes evaluating sample loss by comparing a known gas concentration measured directly and through the sampling line. That evaluation applies to the tested gas and path; use the confined-space guide for the related remote-testing task.",[12035,12037],{"id":11855,"label":12006,"target":12036},{"kind":5585,"path":40},{"id":11858,"label":12038,"target":12039},"NIOSH: Components for Evaluation of Direct-Reading Monitors for Gases and Vapors",{"kind":5558,"sourceId":11829},"Wearing and sampling",{"id":11863,"heading":12042,"paragraphs":12043,"links":12048,"quotations":12052,"navLabel":12055},"Know what pre-use checks confirm",[12044,12045,12046,12047],"A detector needs a working gas response and alarms before it is issued for use. OSHA's testing bulletin incorporates ISEA's recommendation for a bump test or calibration check before each day's use, following the manufacturer's instructions.","A bump test checks gas access and alarm function. A calibration check compares the reading with a known test-gas concentration against the manufacturer's tolerance. Full calibration adjusts the response. Recording which check was performed makes the result useful to the next person responsible for the instrument.","The bulletin calls for full calibration after a failed bump test or calibration check. An instrument that fails full calibration should be removed from service. The specified test gas, regulator, tubing and adapter belong in the preparation for these checks.","Alarm recognition needs attention during equipment selection and training. Work clothing, hearing protection and site noise can affect how the wearer notices a warning. Assess the available signals in that context and use the site's procedure for the response.",[12049],{"id":11872,"label":12050,"target":12051},"OSHA: Calibrating and Testing Direct-Reading Monitors, SHIB 11-26-2024",{"kind":5558,"sourceId":11875},[12053],{"text":11878,"afterParagraph":1972,"referenceLinkId":11872,"locator":12054},"Bump Test (or Function Check) · SHIB 11-26-2024 · Advisory guidance","Pre-use checks",{"id":11883,"heading":12057,"paragraphs":12058,"links":12061,"navLabel":12067,"table":12068},"Choose records that answer your team's questions",[12059,12060],"Decide what the team needs to learn from a record. To investigate an alarm, it may need the time, readings around the event and the work being performed. To review a shift, it may need a longer history. These questions lead to different checks on the recording interval, event detail and export format.","Before choosing an instrument, find out how it records, not just how much it stores. The MS104K-S2 is one example: its storage interval is configurable, records can be viewed, deleted and exported on the instrument, and it stops logging when storage is full rather than overwriting older records. That makes downloading and clearing records part of the shift routine. The alarm-record content and the export format are set for each project, so state in your enquiry which values the team needs and how each record must link to the instrument, the time and the work log.",[12062,12065],{"id":11890,"label":12063,"target":12064},"NIOSH: exposure-limit definitions, p. 6; data processing, p. 25",{"kind":5558,"sourceId":11829},{"id":11894,"label":11678,"target":12066},{"kind":5585,"path":270},"Monitoring records",{"caption":12069,"headers":12070,"rows":12073,"referenceLinkId":11890,"note":12081},"Exposure-limit terms and the records to review",[12071,12072],"Term","Question for the record review",[12074,12076,12078],[11904,12075],"What is the time-weighted average over the applicable reference period?",[11907,12077],"Does the short-term average exceed the applicable short-term limit?",[12079,12080],"Ceiling","Does exposure exceed the ceiling limit under its stated measurement conditions?","Use the applicable limit and its specified averaging or measurement period. A short peak is not itself a STEL calculation. Check which values the instrument records and how it calculates them.",{"id":11914,"heading":12083,"paragraphs":12084,"links":12089,"navLabel":12102},"Compare the complete working kit",[12085,12086,12087,12088],"Compare the sampling arrangement across the candidate models. MS104K-S2 provides diffusion monitoring for one or two gases; MS104K-M combines diffusion with a standard external pump for remote checks. MS400-S has a built-in pump and can switch to diffusion. Compare how each complete kit fits the work, including any move between personal monitoring and remote sampling.","Then compare wearing and operating conditions. The table keeps documented weight and runtime conditions beside the values. Runtime figures for different modes or gas configurations are not a direct ranking. Match the expected time in use with the available charging period, and include the pump when remote sampling is part of the job.","The working kit also includes the supplies for daily checks and care. Identify the compatible test gas, regulator and calibration adapter, then any probe, tubing, filters or carrying accessories needed for the task. Distinguish supplied items from consumables that need replenishment. Check test-gas expiry and the maintenance instructions when planning that supply.","Read the ingress rating together with the operating limits and cleaning instructions. An IP value alone does not establish suitability for a particular washdown or condensation condition. At handover, keep the instrument identity, charging arrangements and required checks clear so the next shift can prepare the same working kit.",[12090,12093,12095,12097,12099],{"id":11923,"label":12091,"target":12092},"Portable gas detection equipment",{"kind":5585,"path":116},{"id":11927,"label":11381,"target":12094},{"kind":5585,"path":200},{"id":11930,"label":10277,"target":12096},{"kind":5585,"path":212},{"id":11933,"label":10273,"target":12098},{"kind":5585,"path":208},{"id":11936,"label":12100,"target":12101},"OSHA: test-gas supply and compatible equipment, Calibration Rules",{"kind":5558,"sourceId":11875},"Equipment comparison",{"id":11941,"heading":12104,"paragraphs":12105,"checklist":12109,"cue":11771,"links":12115,"navLabel":12129},"Check the documents and prepare an equipment inquiry",[12106,12107,12108],"Use the documents to check the equipment being offered. The operating manual should cover the proposed model, sampling mode, accessories and maintenance conditions. A test or calibration record should identify the instrument and state the relevant test conditions and results. That allows the receiving team to connect the record to the unit it receives.","Where hazardous-location approval is required, check the certificate record, covered model or configuration and stated conditions against the project requirement. A company credential or a document for another model does not establish that scope. Keep the applicable documents with the instrument's service history.","Send Eranntex the work description and the requirements already known. You can start without a model number or a completed specification. Our technical team can help compare the gas configuration, sampling accessories and documentation with those inputs. The quotation should identify the selected gases, ranges and agreed items, so the equipment and document package can be checked before ordering.",[12110,11758,12111,12112,12113,12114],"Country and state, facility, work tasks and areas visited.","Personal monitoring and remote sampling tasks, including sampling points and distances.","Shift duration, environmental conditions and charging arrangements.","Alarm, data-recording and communication requirements.","Quantity, maintenance arrangements and required operating, test and approval documents.",[12116,12118,12123,12126],{"id":11955,"label":11217,"target":12117},{"kind":5585,"path":266},{"id":11958,"label":12119,"target":12120},"Discuss your personal gas monitoring requirement",{"kind":5585,"path":300,"query":12121},{"type":7748,"context":12122,"source":48},"Personal gas monitoring equipment requirements",{"id":11964,"label":12124,"target":12125},"NIOSH: equipment documentation, printed pp. 22–24",{"kind":5558,"sourceId":11829},{"id":11968,"label":12127,"target":12128},"Chemical processing guide",{"kind":5585,"path":71},"Documents and inquiry",[12131,12134,12137],{"id":11974,"question":12132,"answer":12133},"When is a single-gas monitor enough?","It is an option when the workplace assessment calls for that one gas measurement and the range and operating conditions fit. If oxygen, combustible gases or other toxic gases also need monitoring, the equipment must cover those measurements. Confirm which gases must be monitored together before selecting the configuration.",{"id":11978,"question":12135,"answer":12136},"Does personal gas monitoring always need a pump?","No. Diffusion can support local personal monitoring when the configuration and wearing arrangement fit the task. A pump supports remote sampling when required. The hose inlet represents the remote sampling point, which may differ from air near the worker. Follow the instrument instructions and site procedure for the mode, inlet position and accessories.",{"id":11982,"question":12138,"answer":12139},"What should we compare besides the detector price?","Compare the complete kit: gas configuration, wearing and sampling arrangements, runtime conditions, charging, recording functions and supplies for daily checks. Use the operating instructions, test or calibration records and any required approval documents to check the proposed equipment. Include consumables, training and maintenance arrangements in the purchasing decision.",{"title":12141,"description":12142},"Personal Gas Monitoring with Portable Gas Detectors","Select portable detectors for personal gas monitoring by target gases, measuring ranges, sampling method, local alarms and site documentation requirements.",[],{"id":41,"slug":999,"gasIds":12145,"industryIds":12146,"productCategoryIds":12147,"resourceIds":12148,"media":12149,"marketContent":12155,"sources":12274},[1994,1980,64,1987],[72,76,80],[117],[267],{"id":12150,"url":12151,"alt":12152,"width":1218,"height":1219,"mimeType":1220,"localizedAlt":12153},"media-application-confined","\u002Fimages\u002Fapplications\u002Fconfined-space-screening-v2.png","Field team using remote gas sampling equipment outside a vessel access opening",{"zh-CN":12154},"现场人员在容器出入口外使用远程气体采样设备",[12156,12220],{"market":315,"locale":316,"publication":12157,"displayName":1002,"h1":12158,"intro":12159,"sections":12160,"faq":12200,"seo":12217},{"status":663,"indexable":10},"受限空间作业的气体检测","受限空间作业包含两项不同的监测任务：进入前的远程气体检测，以及人员在内作业期间的持续监测。先依据现场危害评估确定需检测的气体，再确认采样点、泵吸、探杆与采样管的配置、仪器响应，以及询价所需的设备信息。",[12161,12172,12183,12194],{"id":12162,"heading":12163,"paragraphs":12164,"links":12167},"confined-task-division","把进入前检测与作业期间监测分开",[12165,12166],"进入前的采样点应沿计划进入路径布置；在气体可能分层的位置，还要在不同高度取样。只在出入口取得的结果，未必能代表空间深处的状况。对于适用 29 CFR 1910.146 的美国一般工业作业，气体检测用于在进入前即刻和进入期间评估危害、确认可接受的进入条件。","进入前的检测结果只反映采样位置和采样时刻的气体状况。作业开始后条件可能变化，因此现场进入程序必须规定监测位置、监测时机、是否需要连续监测，以及报警时须采取的措施。",[12168],{"id":12169,"label":12170,"target":12171},"confined-osha-scope","OSHA 29 CFR 1910.146：适用范围、危害与进入程序",{"kind":5558,"sourceId":11373},{"id":12173,"heading":12174,"paragraphs":12175,"links":12178},"confined-hazard-matrix","按已识别的危害选择检测项目",[12176,12177],"评估缺氧或富氧、可燃气体与蒸气，以及针对工艺和作业活动识别出的有毒污染物。一氧化碳（CO）和硫化氢（H₂S）可能相关，但四合一配置并不能覆盖受限空间中所有可能的危害。","依据现场评估选定每种需检测的气体、量程、单位和传感原理，再确认拟定配置可以同时监测哪些气体。对于其适用的美国一般工业场景，OSHA 29 CFR 1910.146 附录 B 说明的检测顺序是先测氧气，再测可燃气体，最后测有毒气体；具体仍以适用的现场程序为准。",[12179],{"id":12180,"label":12181,"target":12182},"confined-osha-order","OSHA 附录 B：气体检测与检测顺序",{"kind":5558,"sourceId":11378},{"id":12184,"heading":12185,"paragraphs":12186,"links":12189},"confined-sampling-arrangement","确定采样方式",[12187,12188],"进入前的远程检测可能需要泵吸、探杆和采样管，使操作人员留在空间外即可从计划的采样点抽取气体。作业期间的监测是另一项任务：要确定仪器由人员随身携带还是放置在何处，以及所需配置和采样方式是否适合这项任务。","检测仪、泵、探杆、过滤器和采样管应作为一套系统确认，与目标气体和现场条件相匹配。在每个采样点，都要留出样气输送、管路吹扫的时间，以及制造商规定的仪器响应时间。仅凭管长，无法得出通用的等待时间。",[12190],{"id":12191,"label":12192,"target":12193},"confined-osha-response","OSHA 附录 B：仪器响应与分层气体",{"kind":5558,"sourceId":11378},{"id":12195,"heading":12196,"paragraphs":12197},"confined-inquiry-requirements","整理设备需求",[12198,12199],"设备询价时，请提供：需检测的气体、量程和单位；需同时检测的气体数量；进入前的采样点；泵吸、探杆和采样管要求；进入期间检测仪的使用方式；电池续航和数据记录需求；现场条件；所需文件；以及目标市场。","使用前，请确认仪器检查、标定、采样管状况，以及现场的报警、撤离和救援安排。本页中的检测读数或产品关联不构成进入许可，也不能替代雇主的许可空间作业程序。",[12201,12205,12209,12213],{"id":12202,"question":12203,"answer":12204},"confined-pump","受限空间检测在什么情况下需要泵吸采样？","泵吸采样可以在操作人员留在空间外的情况下，从远处的采样点抽取气体。请确认泵、探杆、过滤器和采样管与目标气体和现场条件相匹配，并在每个采样点按制造商说明留出样气输送、吹扫和响应的时间。OSHA 29 CFR 1910.146 附录 B 要求至少达到制造商规定的最短仪器响应时间；它并未规定每米管长对应的通用延迟。",{"id":12206,"question":12207,"answer":12208},"confined-gases","受限空间检测仪应监测哪些气体？","依据现场危害评估、工艺和作业活动，选择氧气、可燃气体和有毒气体的监测项目。CO 和 H₂S 可能相关，但 O2、可燃气体、CO 和 H₂S 的配置无法排除其他物质带来的危害。请确认所需量程、单位、传感原理，以及需同时检测的气体组合。",{"id":12210,"question":12211,"answer":12212},"confined-oxygen","氧气读数合格，是否就表示受限空间可以安全进入？","不是。对于其适用的美国一般工业场景，OSHA 29 CFR 1910.146 将体积分数低于 19.5% 或高于 23.5% 的氧气列为危险气体条件。读数在这两个数值之间，并不能排除可燃或有毒气体、吞没或其他危害。进入前仍须完成全面的现场评估，并执行适用的许可程序。",{"id":12214,"question":12215,"answer":12216},"confined-one-detector","一台检测仪能否同时用于进入前检测和作业期间监测？","有可能，但前提是已确认的气体与量程配置、同时检测的气体数量、采样方式、配件、电池续航和现场程序都能支持这两项任务。产品资料中写明的泵吸和扩散能力，本身并不能证明它适用于所有受限空间进入程序。",{"title":12218,"description":12219},"受限空间气体检测：先界定监测任务","界定受限空间的进入前远程采样与作业期间监测，包括气体、量程、采样点与询价要求。",{"market":17,"locale":18,"publication":12221,"displayName":12222,"h1":12223,"intro":12224,"sections":12225,"faq":12258,"seo":12271},{"status":663,"indexable":10},"Confined Space Entry","Gas Detection for Confined Space Entry","Define two separate monitoring tasks: remote atmospheric testing before entry and continued monitoring while people are inside. Select gases from the site hazard assessment, then confirm sampling points, the pump, probe and line arrangement, instrument response and the equipment details needed for the inquiry.",[12226,12235,12244,12253],{"id":12162,"heading":12227,"paragraphs":12228,"links":12231},"Separate pre-entry testing from monitoring during work",[12229,12230],"Plan pre-entry sampling locations along the intended path and at different levels where the atmosphere may be stratified. A result at the access opening alone may not represent conditions deeper inside the space. For US general-industry work governed by 29 CFR 1910.146, atmospheric testing is used to evaluate hazards and verify acceptable entry conditions immediately before and during entry.","A pre-entry result describes the atmosphere at the sampled locations and time. Conditions can change after work begins, so the site entry programme must define monitoring locations, timing, any continuous-monitoring requirement and the actions required when an alarm occurs.",[12232],{"id":12169,"label":12233,"target":12234},"OSHA 29 CFR 1910.146: scope, hazards and entry programme",{"kind":5558,"sourceId":11373},{"id":12173,"heading":12236,"paragraphs":12237,"links":12240},"Match detection to the identified hazards",[12238,12239],"Assess oxygen deficiency or enrichment, flammable gases and vapours, and the toxic contaminants identified for the process and work activity. Carbon monoxide (CO) and hydrogen sulfide (H2S) may be relevant, but a four-gas configuration does not cover every possible confined-space hazard.","Select each required gas, measuring range, unit and sensor principle from the site assessment, then confirm which gases the proposed configuration can monitor simultaneously. OSHA 29 CFR 1910.146 Appendix B describes testing oxygen first, combustible gases next and toxic gases last for the covered US general-industry context; the applicable site procedure remains controlling.",[12241],{"id":12180,"label":12242,"target":12243},"OSHA Appendix B: atmospheric testing and order of testing",{"kind":5558,"sourceId":11378},{"id":12184,"heading":12245,"paragraphs":12246,"links":12249},"Define the sampling arrangement",[12247,12248],"Remote pre-entry testing can require a pump, probe and sample line so the operator can draw atmosphere from planned points while remaining outside. Monitoring during work is a separate task: define where the instrument will be carried or positioned and whether the required configuration and sampling mode suit that task.","Confirm the detector, pump, probe, filters and sample line as a compatible system for the target gases and site conditions. Allow for sample transport, line purging and the manufacturer's specified instrument response time at every point. Hose length alone does not establish a universal waiting time.",[12250],{"id":12191,"label":12251,"target":12252},"OSHA Appendix B: instrument response and stratified atmospheres",{"kind":5558,"sourceId":11378},{"id":12195,"heading":12254,"paragraphs":12255},"Prepare the equipment requirement",[12256,12257],"For an equipment inquiry, provide the required gases, ranges and units; simultaneous detection count; pre-entry sampling points; pump, probe and line requirements; how the detector will be used during entry; battery-runtime and data-recording needs; site conditions; required documents; and destination market.","Before use, confirm instrument checks, calibration, sample-line condition and the site's alarm, evacuation and rescue arrangements. A detector reading or product relationship on this page does not authorize entry or replace the employer's permit-space programme.",[12259,12262,12265,12268],{"id":12202,"question":12260,"answer":12261},"When is pumped sampling relevant for a confined-space check?","Pumped sampling can draw atmosphere from a remote point while the operator remains outside. Confirm the pump, probe, filters and sample-line compatibility for the target gases and site conditions. Follow the manufacturer's instructions for transport, purging and response at each point. OSHA 29 CFR 1910.146 Appendix B calls for at least the manufacturer's specified minimum instrument response time; it does not establish a universal delay per metre of hose.",{"id":12206,"question":12263,"answer":12264},"Which gases should a confined-space detector monitor?","Select oxygen, combustible-gas and toxic-gas monitoring from the site hazard assessment, process and work activity. CO and H2S may be relevant, but an O2, combustible gas, CO and H2S configuration cannot rule out hazards from other substances. Confirm the required ranges, units, sensor principles and simultaneous gas combination.",{"id":12210,"question":12266,"answer":12267},"Does an acceptable oxygen reading mean a confined space is safe to enter?","No. For the covered US general-industry context, OSHA 29 CFR 1910.146 identifies oxygen below 19.5% or above 23.5% by volume as a hazardous atmospheric condition. A reading between those values does not rule out flammable or toxic gases, engulfment or other hazards. Entry still requires the full site assessment and applicable permit procedure.",{"id":12214,"question":12269,"answer":12270},"Can one detector cover both pre-entry testing and monitoring during work?","It may, but only when the confirmed gas and range configuration, simultaneous detection count, sampling arrangement, accessories, battery runtime and site procedure support both tasks. A product's documented pump and diffusion capabilities do not by themselves establish suitability for every confined-space entry programme.",{"title":12272,"description":12273},"Confined Space Gas Detection: Define the Monitoring Task","Define confined-space gas detection for pre-entry remote sampling and monitoring during work, including gases, ranges, sampling points and inquiry requirements.",[],{"id":45,"slug":1004,"gasIds":12276,"industryIds":12277,"productCategoryIds":12278,"resourceIds":12279,"media":12280,"marketContent":12286,"sources":12354},[1994,64,2014],[72],[101,117],[275,267],{"id":12281,"url":12282,"alt":12283,"width":1218,"height":1219,"mimeType":1220,"localizedAlt":12284},"media-application-leak","\u002Fimages\u002Fapplications\u002Fgas-leak-detection-v2.png","Technician checking a process valve during a gas leak inspection",{"zh-CN":12285},"技术人员在气体泄漏巡检中检查工艺阀门",[12287,12323],{"market":315,"locale":316,"publication":12288,"displayName":1007,"h1":12289,"intro":12290,"sections":12291,"faq":12307,"seo":12320},{"status":663,"indexable":10},"工业气体泄漏检测","工业气体泄漏检测帮助团队识别设备、管道和作业区域周边的特定气体危害。便携式仪器用于巡检和排查，固定式检测器在选定点位提供连续监测。",[12292,12297,12302],{"id":12293,"heading":12294,"paragraphs":12295},"leak-release-points","聚焦可能发生释放的位置",[12296],"先从可能发生释放的工艺、物质和设备入手。这样可以在比较检测仪型号之前，缩小气体、量程、监测位置和响应要求的范围。",{"id":12298,"heading":12299,"paragraphs":12300},"leak-detector-method","便携式与固定式设备各司其职",[12301],"便携式设备用于移动检查和泄漏源排查。固定式气体泄漏检测器在选定位置提供持续监测，并可接入兼容的报警或控制设备。",{"id":12303,"heading":12304,"paragraphs":12305},"leak-integration","让报警转化为明确的响应",[12306],"明确报警必须在哪里被看到、需要哪些信号，以及现场团队如何响应。把检测器输出与系统接口一并规划，可以减少安装时的不确定性。",[12308,12312,12316],{"id":12309,"question":12310,"answer":12311},"leak-portable-fixed","便携式气体泄漏检测仪能否替代固定式监测？","便携式和固定式检测器承担不同的监测角色。便携式仪器用于移动巡检和排查；固定式检测器持续监测选定的安装点位，并可接入兼容的报警或控制设备。先明确可能发生释放的位置、目标气体和所需响应，再决定项目需要其中一种还是两种都要。每种拟定配置是否适用，仍需结合现场条件评审。",{"id":12313,"question":12314,"answer":12315},"leak-rfq","气体泄漏检测仪询价应包含哪些信息？","请写明目标气体和量程、可能发生释放的工艺或设备，以及任务是移动巡检还是连续监测。描述安装位置、采样条件、温度、湿度和污染情况。补充可用电源、所需输出信号、现场报警需求、接收信号的控制器或系统接口，以及所需的项目文件。有了这些信息，技术团队才能对照实际任务评估检测器配置。",{"id":12317,"question":12318,"answer":12319},"leak-alarm-integration","把检测器接入报警或控制系统之前，需要明确什么？","先明确报警必须在哪里接收，以及现场期望它触发什么动作。再确定接收信号的控制器或系统、供电、所需信号类型，以及继电器或现场报警要求。这些接口应与拟定的检测器配置一并评审。检测器具备某种输出，本身并不能证明它与所有控制器兼容，也不能代替现场响应程序。",{"title":12321,"description":12322},"工业气体泄漏检测仪与监测系统","按释放情景、目标气体、量程、布点、输出与报警响应，评估便携式与固定式气体泄漏检测。",{"market":17,"locale":18,"publication":12324,"displayName":12325,"h1":12326,"intro":12327,"sections":12328,"faq":12341,"seo":12351},{"status":663,"indexable":10},"Leak Detection","Industrial Gas Leak Detection","Industrial gas leak detection helps teams identify selected gas hazards around equipment, pipework and work areas. Portable instruments support inspection and investigation, while fixed detectors provide continuous monitoring at selected points.",[12329,12333,12337],{"id":12293,"heading":12330,"paragraphs":12331},"Focus on credible release locations",[12332],"Begin with the process, substance and equipment where a release may occur. This helps narrow the gas, range, monitoring position and response requirements before comparing detector models.",{"id":12298,"heading":12334,"paragraphs":12335},"Use portable and fixed equipment for different roles",[12336],"Portable equipment supports mobile checks and source investigation. Fixed gas leak detectors provide continuous awareness at selected locations and can connect to compatible alarm or control equipment.",{"id":12303,"heading":12338,"paragraphs":12339},"Turn an alarm into a clear response",[12340],"Define where alarms must be seen, which signals are required and how site teams will respond. Planning detector outputs and system interfaces together reduces uncertainty during installation.",[12342,12345,12348],{"id":12309,"question":12343,"answer":12344},"Is a portable gas leak detector a substitute for fixed monitoring?","Portable and fixed detectors serve different monitoring roles. Portable instruments support mobile inspection and investigation; fixed detectors continuously monitor selected installation points and can connect to compatible alarm or control equipment. Define the credible release locations, target gas and required response before deciding whether the project needs one or both. The suitability of each proposed configuration still needs review against the site conditions.",{"id":12313,"question":12346,"answer":12347},"What should a gas leak detector inquiry include?","Include the target gas and measuring range, the process or equipment where a release could occur, and whether the task is mobile inspection or continuous monitoring. Describe the installation location, sample access, temperature, moisture and contamination. Add the available power, required output signals, local alarm needs, receiving controller or system interface, and required project documents. These inputs let the technical team evaluate a detector configuration against the actual task.",{"id":12317,"question":12349,"answer":12350},"What should be defined before connecting a detector to an alarm or control system?","Specify where the alarm must be received and what action the site expects it to initiate. Then identify the receiving controller or system, power supply, required signal type and any relay or local alarm requirements. Review these interfaces together with the proposed detector configuration. An available output does not by itself confirm compatibility with every controller or define the site response procedure.",{"title":12352,"description":12353},"Industrial Gas Leak Detectors and Monitoring Systems","Evaluate portable and fixed gas leak detection by release scenario, target gas, range, placement, outputs and alarm response.",[],{"id":37,"slug":1009,"gasIds":12356,"industryIds":12357,"productCategoryIds":12358,"resourceIds":12359,"media":12360,"marketContent":12366,"sources":12434},[1994,64,2014],[72,80],[101,113],[275,267,293],{"id":12361,"url":12362,"alt":12363,"width":1218,"height":1219,"mimeType":1220,"localizedAlt":12364},"media-application-area","\u002Fimages\u002Fapplications\u002Farea-monitoring-v2.png","Fixed gas detector monitoring an industrial process area",{"zh-CN":12365},"固定式气体检测仪监测工业工艺区域",[12367,12403],{"market":315,"locale":316,"publication":12368,"displayName":1012,"h1":12369,"intro":12370,"sections":12371,"faq":12387,"seo":12400},{"status":663,"indexable":10},"固定式与在线气体区域监测","固定式与在线气体监测系统可对选定的工业位置或采样点进行持续监测。检测器布点、样气处理、信号集成与报警响应应作为一个整体的监测方案协同考虑。",[12372,12377,12382],{"id":12373,"heading":12374,"paragraphs":12375},"area-objective","持续掌握选定位置的状况",[12376],"请明确工艺区域、潜在气源、进入条件以及预期的报警响应。这些因素有助于判断点式检测与抽取式在线测量哪种更合适。",{"id":12378,"heading":12379,"paragraphs":12380},"area-system","连接测量、报警与数据",[12381],"监测系统可以组合检测器、样气处理、通讯与控制设备。按系统选择相互兼容的组成部分，有助于安装更清晰，也能获得更有用的运行信息。",{"id":12383,"heading":12384,"paragraphs":12385},"area-maintenance","面向长期运行进行设计",[12386],"环境防护、标定通道、样气预处理与维护要求都会长期影响系统的可用性。请在初期技术评估中一并考虑。",[12388,12392,12396],{"id":12389,"question":12390,"answer":12391},"area-online","区域监测在什么情况下应考虑抽取式在线采样系统？","当测量任务需要把气体从采样点输送出来，或需要在分析前进行预处理时，可考虑抽取式采样。请记录目标气体与量程、样气温度与压力、湿度、污染物以及进入条件的限制。这些信息决定所选设备是否需要过滤、冷却、冷凝液处理或其他预处理。请将完整的样气路径与安装在监测点的检测器进行对比；选择取决于测量目标和现场的实际条件。",{"id":12393,"question":12394,"answer":12395},"area-placement","能否根据产品页确定检测器布点？","不能。产品页说明的是设备能力，并不能确定检测器数量或现场覆盖范围。请提供工艺布局、可能的泄漏位置、目标气体、环境条件、进入条件的限制以及预期的报警响应。项目团队须结合标定与维护通道以及适用的现场要求一并评审布点。",{"id":12397,"question":12398,"answer":12399},"area-sample-path","评审抽取式样气路径需要哪些信息？","请说明采样点、到分析仪的距离、管路与探杆的限制、预期气体浓度、压力、温度、湿度与污染物，并注明过滤或预处理需求、排放路径，以及标定与耗材更换的操作空间。须针对拟定的布置同时评估样气输送与检测器响应；仅凭检测器的响应时间，无法说明整个采样系统的响应。",{"title":12401,"description":12402},"工业气体区域监测系统","围绕工艺区域、采样点、检测器布点、信号集成与维护通道，规划固定式与在线气体区域监测。",{"market":17,"locale":18,"publication":12404,"displayName":12405,"h1":12406,"intro":12407,"sections":12408,"faq":12421,"seo":12431},{"status":663,"indexable":10},"Area Monitoring","Fixed and Online Gas Area Monitoring","Fixed and online gas monitoring systems provide ongoing visibility at selected industrial locations or sample points. Detector placement, sample handling, signal integration and alarm response should work together as one monitoring approach.",[12409,12413,12417],{"id":12373,"heading":12410,"paragraphs":12411},"Maintain awareness at selected locations",[12412],"Identify the process area, potential gas sources, access conditions and expected alarm response. These factors help determine whether point detection or an extracted online measurement is more appropriate.",{"id":12378,"heading":12414,"paragraphs":12415},"Connect measurement, alarms and data",[12416],"A monitoring system can combine detectors, sample handling, communication and control equipment. Choosing compatible elements as a system supports clearer installation and more useful operational information.",{"id":12383,"heading":12418,"paragraphs":12419},"Design for long-term operation",[12420],"Environmental protection, calibration access, sample conditioning and maintenance requirements affect system availability over time. Include them during the initial technical evaluation.",[12422,12425,12428],{"id":12389,"question":12423,"answer":12424},"When should an extractive online sampling system be considered for area monitoring?","Consider extractive sampling when the measurement task requires gas to be transported from a sampling point or conditioned before analysis. Document the target gas and range, sample temperature and pressure, moisture, contamination and access constraints. These inputs determine whether filtration, cooling, condensate handling or other conditioning is appropriate for the selected equipment. Compare the complete sample path with a detector installed at the monitoring point; the choice depends on the measurement objective and actual site conditions.",{"id":12393,"question":12426,"answer":12427},"Can detector placement be decided from a product page?","No. A product page describes equipment capability, but it does not establish detector quantity or site coverage. Provide the process layout, credible release locations, target gases, environmental conditions, access constraints and expected alarm response. The project team must review placement together with calibration and maintenance access and the applicable site requirements.",{"id":12397,"question":12429,"answer":12430},"What information is needed to review an extracted sample path?","Identify the sampling point, distance to the analyzer, tubing and probe constraints, expected gas concentration, pressure, temperature, moisture and contaminants. Include filtration or conditioning needs, the discharge path and access for calibration and consumable replacement. Sample transport and detector response must be evaluated together for the proposed arrangement; detector response time alone does not describe the response of the complete sampling system.",{"title":12432,"description":12433},"Industrial Gas Area Monitoring Systems","Plan fixed and online gas area monitoring around process zones, sample points, detector placement, signal integration and maintenance access.",[],{"value":12436},[12437,12458,12479,12500,12521,12542,12563],{"id":117,"slug":657,"name":658,"description":659,"marketContent":12438,"displayOrder":697,"media":12455},[12439,12447],{"market":315,"locale":316,"publication":12440,"displayName":664,"h1":664,"intro":665,"sections":12441,"selectionGuidance":12442,"featuredResourceIds":12445,"seo":12446},{"status":663,"indexable":10},[],[12443],{"id":669,"heading":670,"paragraphs":12444},[672,673,674,675],[],{"title":664,"description":678,"ogTitle":679,"ogDescription":678},{"market":17,"locale":18,"publication":12448,"displayName":682,"h1":682,"intro":683,"sections":12449,"selectionGuidance":12450,"featuredResourceIds":12453,"seo":12454},{"status":663,"indexable":10},[],[12451],{"id":669,"heading":687,"paragraphs":12452},[689,690,691,692],[],{"title":682,"description":695,"ogTitle":696,"ogDescription":695},{"id":699,"url":700,"alt":701,"localizedAlt":12456,"width":704,"height":704,"mimeType":705,"roles":12457},{"zh-CN":703},[707,708,709],{"id":121,"slug":711,"name":712,"description":713,"marketContent":12459,"displayOrder":746,"media":12476},[12460,12468],{"market":315,"locale":316,"publication":12461,"displayName":717,"h1":717,"intro":718,"sections":12462,"selectionGuidance":12463,"featuredResourceIds":12466,"seo":12467},{"status":663,"indexable":10},[],[12464],{"id":669,"heading":670,"paragraphs":12465},[723,724,725,726],[],{"title":717,"description":729,"ogTitle":730,"ogDescription":729},{"market":17,"locale":18,"publication":12469,"displayName":712,"h1":712,"intro":733,"sections":12470,"selectionGuidance":12471,"featuredResourceIds":12474,"seo":12475},{"status":663,"indexable":10},[],[12472],{"id":669,"heading":687,"paragraphs":12473},[738,739,740,741],[],{"title":712,"description":744,"ogTitle":745,"ogDescription":744},{"id":748,"url":749,"alt":750,"localizedAlt":12477,"width":704,"height":704,"mimeType":705,"roles":12478},{"zh-CN":752},[707,708,709],{"id":101,"slug":755,"name":756,"description":757,"marketContent":12480,"displayOrder":11,"media":12497},[12481,12489],{"market":315,"locale":316,"publication":12482,"displayName":761,"h1":761,"intro":762,"sections":12483,"selectionGuidance":12484,"featuredResourceIds":12487,"seo":12488},{"status":663,"indexable":10},[],[12485],{"id":669,"heading":670,"paragraphs":12486},[767,768,769,770],[],{"title":773,"description":774,"ogTitle":775,"ogDescription":774},{"market":17,"locale":18,"publication":12490,"displayName":778,"h1":778,"intro":779,"sections":12491,"selectionGuidance":12492,"featuredResourceIds":12495,"seo":12496},{"status":663,"indexable":10},[],[12493],{"id":669,"heading":687,"paragraphs":12494},[784,785,786,787],[],{"title":790,"description":791,"ogTitle":792,"ogDescription":791},{"id":794,"url":795,"alt":796,"localizedAlt":12498,"width":799,"height":799,"mimeType":705,"roles":12499},{"zh-CN":798},[707,708,709],{"id":109,"slug":802,"name":803,"description":804,"marketContent":12501,"displayOrder":840,"media":12518},[12502,12510],{"market":315,"locale":316,"publication":12503,"displayName":808,"h1":808,"intro":809,"sections":12504,"selectionGuidance":12505,"featuredResourceIds":12508,"seo":12509},{"status":663,"indexable":10},[],[12506],{"id":669,"heading":670,"paragraphs":12507},[814,815,816,817],[],{"title":820,"description":821,"ogTitle":822,"ogDescription":821},{"market":17,"locale":18,"publication":12511,"displayName":825,"h1":825,"intro":826,"sections":12512,"selectionGuidance":12513,"featuredResourceIds":12516,"seo":12517},{"status":663,"indexable":10},[],[12514],{"id":669,"heading":687,"paragraphs":12515},[831,832,833,834],[],{"title":837,"description":838,"ogTitle":839,"ogDescription":838},{"id":842,"url":843,"alt":844,"localizedAlt":12519,"width":704,"height":704,"mimeType":705,"roles":12520},{"zh-CN":846},[707,708,709],{"id":113,"slug":849,"name":850,"description":851,"marketContent":12522,"displayOrder":887,"media":12539},[12523,12531],{"market":315,"locale":316,"publication":12524,"displayName":855,"h1":855,"intro":856,"sections":12525,"selectionGuidance":12526,"featuredResourceIds":12529,"seo":12530},{"status":663,"indexable":10},[],[12527],{"id":669,"heading":670,"paragraphs":12528},[861,862,863,864],[],{"title":867,"description":868,"ogTitle":869,"ogDescription":868},{"market":17,"locale":18,"publication":12532,"displayName":872,"h1":872,"intro":873,"sections":12533,"selectionGuidance":12534,"featuredResourceIds":12537,"seo":12538},{"status":663,"indexable":10},[],[12535],{"id":669,"heading":687,"paragraphs":12536},[878,879,880,881],[],{"title":884,"description":885,"ogTitle":886,"ogDescription":885},{"id":889,"url":890,"alt":891,"localizedAlt":12540,"width":894,"height":894,"mimeType":705,"roles":12541},{"zh-CN":893},[707,708,709],{"id":105,"slug":897,"name":898,"description":899,"marketContent":12543,"displayOrder":935,"media":12560},[12544,12552],{"market":315,"locale":316,"publication":12545,"displayName":903,"h1":903,"intro":904,"sections":12546,"selectionGuidance":12547,"featuredResourceIds":12550,"seo":12551},{"status":663,"indexable":10},[],[12548],{"id":669,"heading":670,"paragraphs":12549},[909,910,911,912],[],{"title":915,"description":916,"ogTitle":917,"ogDescription":916},{"market":17,"locale":18,"publication":12553,"displayName":920,"h1":920,"intro":921,"sections":12554,"selectionGuidance":12555,"featuredResourceIds":12558,"seo":12559},{"status":663,"indexable":10},[],[12556],{"id":669,"heading":687,"paragraphs":12557},[926,927,928,929],[],{"title":932,"description":933,"ogTitle":934,"ogDescription":933},{"id":937,"url":938,"alt":939,"localizedAlt":12561,"width":894,"height":894,"mimeType":705,"roles":12562},{"zh-CN":941},[707,708,709],{"id":97,"slug":944,"name":945,"description":946,"marketContent":12564,"displayOrder":981,"media":12581},[12565,12573],{"market":315,"locale":316,"publication":12566,"displayName":950,"h1":950,"intro":951,"sections":12567,"selectionGuidance":12568,"featuredResourceIds":12571,"seo":12572},{"status":663,"indexable":10},[],[12569],{"id":669,"heading":670,"paragraphs":12570},[956,957,958,959],[],{"title":962,"description":963,"ogTitle":964,"ogDescription":963},{"market":17,"locale":18,"publication":12574,"displayName":945,"h1":945,"intro":967,"sections":12575,"selectionGuidance":12576,"featuredResourceIds":12579,"seo":12580},{"status":663,"indexable":10},[],[12577],{"id":669,"heading":687,"paragraphs":12578},[972,973,974,975],[],{"title":978,"description":979,"ogTitle":980,"ogDescription":979},{"id":983,"url":984,"alt":985,"localizedAlt":12582,"width":988,"height":989,"mimeType":705,"roles":12583},{"zh-CN":987},[707,708,709],{"value":12585},{"id":197,"slug":646,"modelCode":12586,"productType":1876,"categoryId":117,"samplingMethod":12587,"maxDetectionChannels":1879,"specifications":12588,"resourceIds":12612,"industryIds":12613,"applicationIds":12614,"flexibleAttributes":12615,"minDetectionChannels":1879,"certifications":12635,"certificatePreviewCount":2467,"evidenceScope":125,"evidenceEntries":12639,"media":12647,"marketContent":12654,"supportedDetectionOptions":12674},"BTYQ-MS104K-L","pump",{"ipRating":12589,"dimensions":12590,"weight":12592,"batteryVoltage":12594,"batteryCapacity":12596,"operatingTemperature":12599,"storageCapacity":12602,"alarmVolume":12605,"samplingMethod":12587,"batteryRuntime":12608,"displaySize":12611},"IP66",{"unit":1883,"sourceText":12591},"165 × 64 × 61 mm (maximum L × W × H)",{"value":12593,"unit":1887,"qualifier":1888},280,{"value":12595,"unit":1891,"qualifier":1248},7.4,{"value":12597,"unit":1893,"qualifier":1248,"notes":12598},1250,"Equivalent source representation: 3.7 V \u002F 2500 mAh.",{"min":12600,"max":12601},{"value":1900,"unit":1901,"qualifier":1248,"notes":1902},{"value":1904,"unit":1901,"qualifier":1248,"notes":1902},{"value":12603,"unit":12604,"qualifier":1248},100000,"records",{"value":12606,"unit":1910,"qualifier":1896,"notes":12607},95,"At 30 cm.",{"value":1246,"unit":12609,"qualifier":1248,"notes":12610},"h","Pump operation; with the pump off, diffusion operation using an electrochemical sensor exceeds 100 hours.",{"value":2459,"unit":1907,"qualifier":1248},[10053,2275,2278,6569],[],[],[12616,12617,12618,12619,12621,12622,12624,12625,12627,12631],{"key":1923,"label":1924,"value":1925,"group":1926},{"key":1928,"label":1929,"value":1930,"group":1926},{"key":1941,"label":1942,"value":1943,"group":1935},{"key":1945,"label":1946,"value":12620,"group":1935},"T90 ≤ 20 s",{"key":1949,"label":1950,"value":1951,"group":1935},{"key":1953,"label":1954,"value":12623,"group":1935},"10–95% RH, non-condensing",{"key":1957,"label":1958,"value":1959,"group":1935},{"key":1961,"label":1962,"value":12626,"group":1935},"High-strength, corrosion-resistant, flame-retardant polycarbonate with rubber protective sleeve; drop resistance ≥5 m",{"key":12628,"label":12629,"value":12630,"group":1935},"enclosure-option","Enclosure option","IP68 available as a custom configuration",{"key":12632,"label":12633,"value":12634,"group":1935},"diffusion-runtime","Diffusion runtime","Over 100 h with pump off and an electrochemical sensor",[12636,12637,12638],{"label":3141,"number":3142},{"label":3366,"number":3784},{"label":3801,"number":3846},[12640,12643,12645],{"id":2278,"kind":12641,"scope":125,"certificateId":2272,"productIds":12642},"Certificate",[],{"id":2275,"kind":12641,"scope":125,"certificateId":2269,"productIds":12644},[],{"id":10053,"kind":12641,"scope":125,"certificateId":3845,"productIds":12646},[],[12648],{"id":12649,"url":12650,"alt":12651,"width":12652,"height":1212,"mimeType":705,"roles":12653},"media-ms104k-l-frontend-fit-20261020","\u002Fimages\u002Fproducts\u002Ffrontend-fit-20261020\u002Feranntex-btyq-ms104k-l-frontend-fit-20261020.webp","Eranntex BTYQ-MS104K-L product view.",586,[707,708,709],[12655,12672],{"market":315,"locale":316,"displayName":12656,"shortDescription":12657,"masterText":12658},"MS104K-L 便携式单气体检测仪","面向特定应用单气体监测的便携式泵吸气体检测仪。",{"Technical":2295,"Response time":2296,"Operating humidity":2297,"records":12659,"Configuration":2298,"Recovery time":2299,"Standard 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