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Its range includes portable and fixed gas detectors, online monitoring systems and gas analyzers.",{"market":323,"locale":324,"publication":720,"title":721,"summary":722,"seo":723,"mediaCaption":729,"body":730},{"status":568,"indexable":10},"科特迪瓦客户来访逸云天，交流烟气分析需求","科特迪瓦一家环保检测机构到访逸云天，围绕烟气分析需求和 BTYQ-PTM600-S 移动式多气体分析仪进行交流。",{"title":721,"description":724,"ogImage":725},"科特迪瓦一家环保检测机构到访逸云天，交流 HCl、H2S、SO2、NO2、CO、CO2、HCN 和 VOC 等烟气组分的检测需求及 BTYQ-PTM600-S 配置。",{"id":726,"url":727,"width":693,"height":694,"mimeType":675,"alt":728},"media-cote-divoire-customers-visit-eranntex-flue-gas-analysis-cover-cn","\u002Fimages\u002Fresources\u002Feranntex-cote-divoire-customer-visit-ptm600-s-cover-zh.webp","科特迪瓦客户来访交流新闻封面，包含接待区合影与 BTYQ-PTM600-S 产品图。","科特迪瓦客户与逸云天工作人员在逸云天公司接待区合影。",[731,738,741,744],{"id":699,"paragraphs":732,"links":734},[733],"科特迪瓦一家环保检测机构的代表到访逸云天，围绕烟气分析需求和 BTYQ-PTM600-S 移动式多气体分析仪进行交流。",[735],{"id":704,"label":736,"target":737},"BTYQ-PTM600-S 移动式多气体分析仪",{"kind":707,"path":228},{"id":709,"paragraphs":739},[740],"该机构需要在烟气中检测氯化氢（HCl）、硫化氢（H2S）、二氧化硫（SO2）、二氧化氮（NO2）、一氧化碳（CO）、二氧化碳（CO2）、氰化氢（HCN）和挥发性有机物（VOC）。",{"id":713,"paragraphs":742},[743],"PTM600-S 是一款采用模块化传感器的泵吸式分析仪，上述气体均在其可选检测范围内，单台最多可配置 24 个检测通道。哪些气体组合在同一台仪器中、各自采用什么量程，由销售工程师按项目需求与客户确认。",{"id":23,"paragraphs":745},[746],"逸云天总部位于深圳，自 2006 年起从事气体检测设备制造，产品包括便携式和固定式气体检测仪、在线监测系统及气体分析仪。",[],{"productIds":749,"gasIds":750,"industryIds":751,"applicationIds":752,"id":264,"slug":753,"type":668,"status":559,"language":18,"revision":669,"issueDate":670,"author":671,"media":754,"certificateIds":762,"marketContent":763,"sources":830},[],[],[],[],"custom-flue-gas-analyzer-africa-environmental-testing",{"id":755,"url":756,"mimeType":675,"width":757,"height":758,"alt":759,"localizedAlt":760},"media-custom-flue-gas-analyzer-africa-environmental-testing-reception","\u002Fimages\u002Fresources\u002Fafrica-environmental-testing-customer-eranntex-reception.webp",2000,1500,"Three people stand in front of the Eranntex sign in the company reception area.",{"zh-CN":761},"三人在逸云天公司接待区合影，身后是 Eranntex 与逸云天标识。",[],[764,800],{"market":17,"locale":18,"publication":765,"title":766,"summary":767,"seo":768,"mediaCaption":776,"body":777},{"status":568,"indexable":10},"Eranntex supplies custom flue gas analyzer to African environmental testing organization","An environmental testing organization in Africa will use the handheld BTYQ-MS600-YQ in combustion and exhaust gas work for mining, foundry and power generation clients.",{"title":769,"description":770,"ogImage":771},"Custom flue gas analyzer supplied to African testing organization","Eranntex has supplied its custom BTYQ-MS600-YQ handheld flue gas analyzer to an environmental testing organization in Africa that works with mines, foundries and power plants.",{"id":772,"url":773,"width":774,"height":694,"mimeType":675,"alt":775},"media-custom-flue-gas-analyzer-africa-environmental-testing-cover-global","\u002Fimages\u002Fresources\u002Feranntex-africa-flue-gas-analyzer-supply-cover-en.webp",1585,"Eranntex custom flue gas analyzer supply to Africa, with a reception group photograph and product reference.","A representative of the customer with Eranntex staff at the Eranntex reception.",[778,785,789,791],{"id":699,"paragraphs":779,"links":780},[770],[781],{"id":782,"label":783,"target":784},"custom-analyzer","BTYQ-MS600-YQ handheld flue gas analyzer",{"kind":707,"path":216},{"id":786,"paragraphs":787},"customer-work",[788],"The organization measures combustion and exhaust gases when it assesses industrial facilities, including in work related to certification. It uses the results to recommend how plants can improve their operating conditions, with the aim of helping them use fuel and electricity more efficiently.",{"id":23,"paragraphs":790},[718],{"id":792,"paragraphs":793,"links":795},"product-information",[794],"Specifications for the BTYQ-MS600-S flue gas analyzer are on its product page. Target gases, measurement ranges and sampling accessories are confirmed with our sales engineers for each project.",[796],{"id":797,"label":798,"target":799},"selection-entry","BTYQ-MS600-S",{"kind":707,"path":216},{"market":323,"locale":324,"publication":801,"title":802,"summary":803,"seo":804,"mediaCaption":810,"body":811},{"status":568,"indexable":10},"逸云天烟气分析仪销往非洲市场","非洲一家环保检测机构选用逸云天定制型手持式烟气分析仪，用于其在采矿、铸造和发电领域的燃烧与尾气检测。",{"title":802,"description":805,"ogImage":806},"逸云天向非洲一家环保检测机构交付定制型手持式烟气分析仪 BTYQ-MS600-YQ，用于采矿、铸造和发电领域的燃烧与尾气分析。",{"id":807,"url":808,"width":774,"height":694,"mimeType":675,"alt":809},"media-custom-flue-gas-analyzer-africa-environmental-testing-cover-cn","\u002Fimages\u002Fresources\u002Feranntex-africa-flue-gas-analyzer-supply-cover-zh.webp","逸云天烟气分析仪销往非洲市场新闻封面，包含接待区合影与产品参考图。","客户代表与逸云天工作人员在逸云天公司接待区合影。",[812,819,822,824],{"id":699,"paragraphs":813,"links":815},[814],"逸云天已向非洲一家环保检测机构交付定制型手持式烟气分析仪 BTYQ-MS600-YQ。该机构的检测业务覆盖采矿企业、铸造厂和发电厂。",[816],{"id":782,"label":817,"target":818},"BTYQ-MS600-YQ",{"kind":707,"path":216},{"id":786,"paragraphs":820},[821],"这家机构在评估工业设施时开展燃烧分析和尾气测量，也参与认证相关工作，并根据分析结果向企业提出改善运行条件的建议。客户希望借此帮助企业降低燃料和电力消耗，提高用能效率。",{"id":23,"paragraphs":823},[746],{"id":792,"paragraphs":825,"links":827},[826],"烟气分析仪选型可参考 BTYQ-MS600-S 产品页；检测气体、量程和采样配件由销售工程师按项目需求与客户确认。",[828],{"id":797,"label":798,"target":829},{"kind":707,"path":216},[],{"productIds":832,"gasIds":833,"industryIds":834,"applicationIds":835,"id":836,"slug":837,"type":838,"status":559,"language":324,"revision":839,"issueDate":840,"media":841,"download":848,"certificateIds":853,"marketContent":855,"sources":860},[185],[],[],[],"resource-mic-500s-ch4-type-evaluation-hyq202638541","mic-500s-ch4-type-evaluation-hyq202638541","test_report","HYQ202638541","2026-10-13",{"id":842,"url":843,"alt":844,"width":845,"height":846,"mimeType":847},"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":849,"url":850,"alt":851,"mimeType":852},"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",[854],"certificate-2026c743-44",[856],{"market":17,"locale":18,"publication":857,"title":858,"summary":859},{"status":568,"indexable":569},"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":862,"gasIds":863,"industryIds":864,"applicationIds":865,"id":866,"slug":854,"type":558,"status":559,"language":324,"issueDate":867,"media":868,"download":874,"certificateIds":878,"marketContent":879,"sources":883},[],[],[],[],"resource-certificate-2026c743-44","2026-10-26",{"id":869,"url":870,"alt":871,"width":872,"height":873,"mimeType":847},"media-certificate-2026c743-44-preview","\u002Fimages\u002Fcertificates\u002Fproducts\u002Fcertificate-2026c743-44.jpg","Preview of China Type Approval Certificate (CPA) 2026C743-44",2286,1622,{"id":875,"url":876,"alt":877,"mimeType":852},"file-certificate-2026c743-44","\u002Fdocuments\u002Fcertificates\u002Fcertificate-2026c743-44.pdf","China Type Approval Certificate (CPA) 2026C743-44 PDF",[854],[880],{"market":17,"locale":18,"publication":881,"title":882},{"status":568,"indexable":569},"China Type Approval Certificate (CPA) 2026C743-44",[],{"productIds":885,"gasIds":886,"industryIds":887,"applicationIds":888,"id":889,"slug":890,"type":838,"status":559,"language":324,"revision":891,"issueDate":892,"media":893,"download":900,"certificateIds":904,"marketContent":905,"sources":910},[209],[],[],[],"resource-ms104k-s2-sgs-drop-test-gzmr261003754301-zh-cn","ms104k-s2-sgs-drop-test-gzmr261003754301-zh-cn","GZMR261003754301_CN","2026-10-16",{"id":894,"url":895,"alt":896,"width":897,"height":898,"mimeType":899},"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,"image\u002Fpng",{"id":901,"url":902,"alt":903,"mimeType":852},"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",[],[906],{"market":17,"locale":18,"publication":907,"title":908,"summary":909},{"status":568,"indexable":569},"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":912,"gasIds":913,"industryIds":914,"applicationIds":915,"id":916,"slug":917,"type":838,"status":559,"language":18,"revision":918,"issueDate":892,"media":919,"download":923,"certificateIds":927,"marketContent":928,"sources":933},[209],[],[],[],"resource-ms104k-s2-sgs-drop-test-gzmr261003754301-en","ms104k-s2-sgs-drop-test-gzmr261003754301-en","GZMR261003754301",{"id":920,"url":921,"alt":922,"width":897,"height":898,"mimeType":899},"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":924,"url":925,"alt":926,"mimeType":852},"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",[],[929],{"market":17,"locale":18,"publication":930,"title":931,"summary":932},{"status":568,"indexable":569},"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":935,"gasIds":936,"industryIds":937,"applicationIds":938,"id":939,"slug":940,"type":838,"status":559,"language":324,"revision":941,"issueDate":942,"media":943,"download":947,"certificateIds":951,"marketContent":952,"sources":957},[209],[],[],[],"resource-ms104k-s2-sgs-drop-test-gzmr260903639401-zh-cn","ms104k-s2-sgs-drop-test-gzmr260903639401-zh-cn","GZMR260903639401_CN","2026-10-09",{"id":944,"url":945,"alt":946,"width":897,"height":898,"mimeType":899},"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":948,"url":949,"alt":950,"mimeType":852},"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",[],[953],{"market":17,"locale":18,"publication":954,"title":955,"summary":956},{"status":568,"indexable":569},"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":959,"gasIds":960,"industryIds":961,"applicationIds":962,"id":963,"slug":964,"type":838,"status":559,"language":18,"revision":965,"issueDate":942,"media":966,"download":970,"certificateIds":974,"marketContent":975,"sources":980},[209],[],[],[],"resource-ms104k-s2-sgs-drop-test-gzmr260903639401-en","ms104k-s2-sgs-drop-test-gzmr260903639401-en","GZMR260903639401",{"id":967,"url":968,"alt":969,"width":897,"height":898,"mimeType":899},"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":971,"url":972,"alt":973,"mimeType":852},"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",[],[976],{"market":17,"locale":18,"publication":977,"title":978,"summary":979},{"status":568,"indexable":569},"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":982,"gasIds":983,"industryIds":984,"applicationIds":985,"id":305,"slug":986,"type":987,"status":559,"language":18,"revision":988,"issueDate":989,"author":990,"media":991,"certificateIds":999,"marketContent":1000,"sources":4157},[201,213],[],[],[],"what-does-a-4-gas-monitor-detect","technical_guide","w04-revision20-local-20261023","2026-10-23","Eranntex Technical Team",{"id":992,"url":993,"alt":994,"width":995,"height":996,"mimeType":675,"roles":997},"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,[998],"hero",[],[1001,2690],{"market":17,"locale":18,"publication":1002,"title":1003,"summary":1004,"body":1005,"faq":2661,"seo":2685,"mediaLayout":2688,"reviewedOnPublication":10,"updatedOn":2689},{"status":568,"indexable":10},"What Does a 4-Gas Monitor Detect? Gases, Limits & Selection","A standard 4-gas monitor, often called a 4-gas meter, measures oxygen (O₂, % by volume), combustible gas as a percentage of the lower explosive limit (%LEL), hydrogen sulfide (H₂S, ppm) and carbon monoxide (CO, ppm). Those readings match the atmospheric hazards that US confined-space rules require testing for: oxygen outside 19.5–23.5% by volume, flammable gas above 10% of its lower flammable limit, and toxic gas above its exposure limit. A standard 4-gas configuration does not measure CO₂, and a low %LEL reading does not show that solvent vapor is below its exposure limit. When the hazard includes either one, the instrument needs another sensor.",[1006,1170,1321,1569,1748,1912,1946,2186,2257,2348],{"id":1007,"heading":1008,"paragraphs":1009,"blocks":1014},"four-gas-readings","What do the four readings tell you?",[1010,1011,1012,1013],"The four sensors follow the order in which OSHA's permit-space standard has the air tested before entry: oxygen first, then combustible gases and vapors, then toxic gases and vapors. [S9] Oxygen comes first because most combustible-gas sensors need oxygen to give a reliable reading. Combustible gas comes second because fire or explosion is usually the more immediate threat. [S17] H₂S and CO are the two toxic gases the standard 4-gas configuration carries. For H₂S, the instrument also replaces a sense of smell that NIOSH warns cannot be relied on: the nose quickly tires of the rotten-egg odor while the gas is still present. [S18] The confined space entry guide covers pre-entry testing, and the personal gas monitoring guide covers wearing the monitor during the work.","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.",[1015,1043,1052,1132,1142,1149],{"kind":1016,"content":1017},"paragraph",[1018,1020,1023,1025,1028,1030,1033,1035,1037,1039,1041],{"text":1019},"The four sensors follow the order in which OSHA's permit-space standard has the air tested before entry: oxygen first, then combustible gases and vapors, then toxic gases and vapors. ",{"text":1021,"href":1022,"citation":10},"[S9]","#ref-s9",{"text":1024}," Oxygen comes first because most combustible-gas sensors need oxygen to give a reliable reading. Combustible gas comes second because fire or explosion is usually the more immediate threat. ",{"text":1026,"href":1027,"citation":10},"[S17]","#ref-s17",{"text":1029}," H₂S and CO are the two toxic gases the standard 4-gas configuration carries. For H₂S, the instrument also replaces a sense of smell that NIOSH warns cannot be relied on: the nose quickly tires of the rotten-egg odor while the gas is still present. ",{"text":1031,"href":1032,"citation":10},"[S18]","#ref-s18",{"text":1034}," The ",{"text":1036,"href":40},"confined space entry guide",{"text":1038}," covers pre-entry testing, and the ",{"text":1040,"href":48},"personal gas monitoring guide",{"text":1042}," covers wearing the monitor during the work.",{"kind":1016,"content":1044},[1045,1047,1050],{"text":1046},"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":1048,"href":1049,"citation":10},"[S1]","#ref-s1",{"text":1051}," These readings answer different questions, so one cannot stand in for another.",{"kind":1053,"caption":1054,"headers":1055,"rows":1065,"source":1122},"table","What each reading answers and what it does not",[1056,1059,1062],[1057],{"text":1058},"Reading",[1060],{"text":1061},"What the reading answers",[1063],{"text":1064},"What the reading does not answer",[1066,1082,1093,1107],{"cells":1067},[1068,1071,1074],[1069],{"text":1070},"Oxygen (O₂), % vol",[1072],{"text":1073},"Whether the air is oxygen-deficient or oxygen-enriched.",[1075,1077,1080],{"text":1076},"Which gas displaced the oxygen, or how much CO₂ is present. See the ",{"text":1078,"href":1079},"CO₂ section","#carbon-dioxide-blind-spot",{"text":1081},".",{"cells":1083},[1084,1087,1090],[1085],{"text":1086},"Carbon monoxide (CO), ppm",[1088],{"text":1089},"The current CO concentration at the sensor.",[1091],{"text":1092},"A time-weighted average, unless the instrument calculates one over a stated period.",{"cells":1094},[1095,1098,1101],[1096],{"text":1097},"Hydrogen sulfide (H₂S), ppm",[1099],{"text":1100},"The current H₂S concentration at the sensor.",[1102,1104,1106],{"text":1103},"How a recorded peak relates to a TWA. See the ",{"text":1105,"href":278},"H₂S peak and TWA record guide",{"text":1081},{"cells":1108},[1109,1112,1115],[1110],{"text":1111},"Combustible gas, %LEL",[1113],{"text":1114},"Flammability relative to the LEL of the calibration gas.",[1116,1118,1121],{"text":1117},"Toxic exposure to the same vapor. See the ",{"text":1119,"href":1120},"solvent section","#solvent-vapor-exposure",{"text":1081},[1123,1125,1126,1128,1131],{"text":1124},"Sources: ",{"text":1048,"citation":10,"href":1049},{"text":1127}," ",{"text":1129,"citation":10,"href":1130},"[S2]","#ref-s2",{"text":1081},{"kind":1016,"content":1133},[1134,1136,1137,1139,1140],{"text":1135},"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":1129,"href":1130,"citation":10},{"text":1138}," That distinction matters when an instrument records a brief high reading but a much lower average. The ",{"text":1105,"href":278},{"text":1141}," works through that comparison.",{"kind":1016,"content":1143},[1144,1146,1147],{"text":1145},"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":1129,"href":1130,"citation":10},{"text":1148}," Those references are not proposed factory alarm settings.",{"kind":1150,"ordered":569,"items":1151},"list",[1152,1158,1164],[1153,1155,1157],{"text":1154,"strong":10},"TWA:",{"text":1156}," a time-weighted average over a stated period. ",{"text":1129,"citation":10,"href":1130},[1159,1161,1163],{"text":1160,"strong":10},"STEL:",{"text":1162}," a short-term average, usually over 15 minutes. ",{"text":1129,"citation":10,"href":1130},[1165,1167,1169],{"text":1166,"strong":10},"Ceiling:",{"text":1168}," a value that should not be exceeded at any time. ",{"text":1129,"citation":10,"href":1130},{"id":1171,"heading":1172,"paragraphs":1173,"blocks":1177},"alarm-levels","What alarm levels does a 4-gas meter use?",[1174,1175,1176],"A 4-gas meter has no single built-in set of alarm levels. The set points are configured for each gas. In the US, the reference values below are the ones they are compared with. [S5] [S9] [S18] [S19] The oxygen and %LEL values define a hazardous atmosphere in a permit space. The H₂S and CO values are exposure limits, each with its own averaging period, which has to match the alarm mode it is used with.","For oxygen, OSHA's technical manual notes that meter alarms are usually set at the same two boundaries: below 19.5% for a deficient atmosphere and above 23.5% for an enriched one. [S1] A combustible-gas alarm set at 10%LEL sits on the permit-space boundary itself, so a lower first alarm warns before that boundary is reached. [S9] For H₂S and CO, a TWA value belongs to the TWA alarm mode, while ceiling and peak values belong to the instant high alarm. A TWA figure used as an instant alarm, or the reverse, compares a reading with the wrong time basis. [S2]","Eranntex does not ship one fixed set of alarm points. For BTYQ-MS104K-M and BTYQ-MS400-S, which offer low, high, range and TWA\u002FSTEL alarm modes [S3], we set the default modes and set points to the values the customer specifies when ordering. [S21] Put them in the quotation with the gas combination and measuring ranges. Values outside the US come from the jurisdiction where the instrument is used, and many differ from those above. The site's own program decides the final settings.",[1178,1195,1296,1307],{"kind":1016,"content":1179},[1180,1182,1185,1186,1187,1188,1189,1190,1193],{"text":1181},"A 4-gas meter has no single built-in set of alarm levels. The set points are configured for each gas. In the US, the reference values below are the ones they are compared with. ",{"text":1183,"href":1184,"citation":10},"[S5]","#ref-s5",{"text":1127},{"text":1021,"href":1022,"citation":10},{"text":1127},{"text":1031,"href":1032,"citation":10},{"text":1127},{"text":1191,"href":1192,"citation":10},"[S19]","#ref-s19",{"text":1194}," The oxygen and %LEL values define a hazardous atmosphere in a permit space. The H₂S and CO values are exposure limits, each with its own averaging period, which has to match the alarm mode it is used with.",{"kind":1053,"caption":1196,"headers":1197,"rows":1206},"US reference values for 4-gas alarm settings",[1198,1200,1203],[1199],{"text":1058},[1201],{"text":1202},"US value",[1204],{"text":1205},"Type and source",[1207,1219,1230,1242,1253,1264,1275,1286],{"cells":1208},[1209,1212,1215],[1210],{"text":1211},"Oxygen",[1213],{"text":1214},"Below 19.5% vol (deficient); above 23.5% vol (enriched)",[1216,1218],{"text":1217},"OSHA definition of a hazardous atmosphere, 29 CFR 1910.146 ",{"text":1021,"href":1022,"citation":10},{"cells":1220},[1221,1224,1227],[1222],{"text":1223},"%LEL",[1225],{"text":1226},"Above 10% of the lower flammable limit",[1228,1229],{"text":1217},{"text":1021,"href":1022,"citation":10},{"cells":1231},[1232,1235,1238],[1233],{"text":1234},"H₂S",[1236],{"text":1237},"10 ppm ceiling, 10 minutes",[1239,1241],{"text":1240},"NIOSH REL (advisory) ",{"text":1031,"href":1032,"citation":10},{"cells":1243},[1244,1246,1249],[1245],{"text":1234},[1247],{"text":1248},"20 ppm ceiling; 50 ppm peak for up to 10 minutes, once per shift if no other measurable exposure occurs",[1250,1252],{"text":1251},"OSHA PEL, general industry (Table Z-2) ",{"text":1191,"href":1192,"citation":10},{"cells":1254},[1255,1257,1260],[1256],{"text":1234},[1258],{"text":1259},"100 ppm",[1261,1263],{"text":1262},"NIOSH IDLH ",{"text":1031,"href":1032,"citation":10},{"cells":1265},[1266,1269,1272],[1267],{"text":1268},"CO",[1270],{"text":1271},"35 ppm TWA; 200 ppm ceiling",[1273,1274],{"text":1240},{"text":1183,"href":1184,"citation":10},{"cells":1276},[1277,1279,1282],[1278],{"text":1268},[1280],{"text":1281},"50 ppm TWA",[1283,1285],{"text":1284},"OSHA PEL ",{"text":1183,"href":1184,"citation":10},{"cells":1287},[1288,1290,1293],[1289],{"text":1268},[1291],{"text":1292},"1,200 ppm",[1294,1295],{"text":1262},{"text":1183,"href":1184,"citation":10},{"kind":1016,"content":1297},[1298,1300,1301,1303,1304,1306],{"text":1299},"For oxygen, OSHA's technical manual notes that meter alarms are usually set at the same two boundaries: below 19.5% for a deficient atmosphere and above 23.5% for an enriched one. ",{"text":1048,"href":1049,"citation":10},{"text":1302}," A combustible-gas alarm set at 10%LEL sits on the permit-space boundary itself, so a lower first alarm warns before that boundary is reached. ",{"text":1021,"href":1022,"citation":10},{"text":1305}," For H₂S and CO, a TWA value belongs to the TWA alarm mode, while ceiling and peak values belong to the instant high alarm. A TWA figure used as an instant alarm, or the reverse, compares a reading with the wrong time basis. ",{"text":1129,"href":1130,"citation":10},{"kind":1016,"content":1308},[1309,1311,1314,1316,1319],{"text":1310},"Eranntex does not ship one fixed set of alarm points. For BTYQ-MS104K-M and BTYQ-MS400-S, which offer low, high, range and TWA\u002FSTEL alarm modes ",{"text":1312,"href":1313,"citation":10},"[S3]","#ref-s3",{"text":1315},", we set the default modes and set points to the values the customer specifies when ordering. ",{"text":1317,"href":1318,"citation":10},"[S21]","#ref-s21",{"text":1320}," Put them in the quotation with the gas combination and measuring ranges. Values outside the US come from the jurisdiction where the instrument is used, and many differ from those above. The site's own program decides the final settings.",{"id":1322,"heading":1323,"paragraphs":1324,"blocks":1332},"co-range-accuracy","How do measuring range and accuracy affect the CO reading?",[1325,1326,1327,1328,1329,1330,1331],"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.","Against the CO references in the alarm table (NIOSH 35 ppm TWA and 200 ppm ceiling, OSHA 50 ppm 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.",[1333,1340,1418,1429,1441,1454,1518,1534,1539,1562],{"kind":1016,"content":1334},[1335,1337],{"text":1336},"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":1338,"href":1339,"citation":10},"[S4]","#ref-s4",{"kind":1053,"caption":1341,"headers":1342,"rows":1352,"source":1414},"Selected gas and range options for BTYQ-MS104K-M and BTYQ-MS400-S",[1343,1346,1349],[1344],{"text":1345},"Measurement",[1347],{"text":1348},"Measuring range",[1350],{"text":1351},"Display resolution",[1353,1364,1375,1385,1395,1403],{"cells":1354},[1355,1358,1361],[1356],{"text":1357},"Oxygen (O₂)",[1359],{"text":1360},"0–30% vol",[1362],{"text":1363},"0.01% vol",{"cells":1365},[1366,1369,1372],[1367],{"text":1368},"Carbon monoxide (CO)",[1370],{"text":1371},"0–100 ppm",[1373],{"text":1374},"0.01 ppm",{"cells":1376},[1377,1379,1382],[1378],{"text":1368},[1380],{"text":1381},"0–1000 ppm",[1383],{"text":1384},"0.1 ppm",{"cells":1386},[1387,1390,1393],[1388],{"text":1389},"Hydrogen sulfide (H₂S)",[1391],{"text":1392},"0–10 ppm",[1394],{"text":1374},{"cells":1396},[1397,1399,1401],[1398],{"text":1389},[1400],{"text":1371},[1402],{"text":1374},{"cells":1404},[1405,1408,1411],[1406],{"text":1407},"Combustible gas",[1409],{"text":1410},"0–100%LEL",[1412],{"text":1413},"0.1%LEL",[1415,1416,1417],{"text":1124},{"text":1338,"citation":10,"href":1339},{"text":1081},{"kind":1016,"content":1419},[1420,1422,1423,1425,1427],{"text":1421},"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":1312,"href":1313,"citation":10},{"text":1424}," At that rating, 0–100 ppm gives an absolute tolerance of ±3 ppm, while 0–1000 ppm gives ±30 ppm. ",{"text":1426,"href":1313,"citation":10},"[S3; calculation]",{"text":1428}," Display resolution is the smallest displayed step; extra decimal places do not reduce that tolerance.",{"kind":1016,"content":1430},[1431,1433,1436,1438,1439],{"text":1432},"Against the CO references in the ",{"text":1434,"href":1435},"alarm table","#alarm-levels",{"text":1437}," (NIOSH 35 ppm TWA and 200 ppm ceiling, OSHA 50 ppm TWA) ",{"text":1183,"href":1184,"citation":10},{"text":1440},", 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":1016,"content":1442},[1443,1445,1448,1449,1452],{"text":1444},"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":1446,"href":1447,"citation":10},"[S6]","#ref-s6",{"text":1127},{"text":1450,"href":1451,"citation":10},"[S7]","#ref-s7",{"text":1453}," 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":1053,"caption":1455,"headers":1456,"rows":1469,"source":1509},"CO accuracy specifications: calculated tolerance and laboratory evidence",[1457,1460,1463,1466],[1458],{"text":1459},"Error statement",[1461],{"text":1462},"Range",[1464],{"text":1465},"What is established near 35 ppm?",[1467],{"text":1468},"Conditions and limits",[1470,1483,1495],{"cells":1471},[1472,1475,1477,1480],[1473],{"text":1474},"Specification table, typical ±3%FS",[1476],{"text":1371},[1478],{"text":1479},"±3 ppm",[1481],{"text":1482},"Typical value; test conditions not stated. Cannot read a 200 ppm ceiling event.",{"cells":1484},[1485,1487,1489,1492],[1486],{"text":1474},[1488],{"text":1381},[1490],{"text":1491},"±30 ppm",[1493],{"text":1494},"Typical value; test conditions not stated.",{"cells":1496},[1497,1500,1503,1506],[1498],{"text":1499},"Type-evaluation MPE: ±5 μmol\u002Fmol or ±10%",[1501],{"text":1502},"0–1000 μmol\u002Fmol",[1504],{"text":1505},"Not tested near 35 ppm. The report states ±5 μmol\u002Fmol or ±10%. ",[1507],{"text":1508},"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. ",[1510,1511,1512,1513,1514,1515,1516],{"text":1124},{"text":1312,"citation":10,"href":1313},{"text":1127},{"text":1446,"citation":10,"href":1447},{"text":1127},{"text":1450,"citation":10,"href":1451},{"text":1517},". Calculated values use the method and assumptions given in the text.",{"kind":1016,"content":1519},[1520,1522,1523,1524,1525,1527,1528,1529,1530,1531,1532],{"text":1521},"Across the reported CO test points, the results ranged from −1.7% to +5.3% of the reference gas. ",{"text":1446,"href":1447,"citation":10},{"text":1127},{"text":1450,"href":1451,"citation":10},{"text":1526}," The tests covered 20–24 °C, whereas our typical operating range is −20 to +55 °C and 10–95 %RH. ",{"text":1312,"href":1313,"citation":10},{"text":1127},{"text":1446,"href":1447,"citation":10},{"text":1127},{"text":1450,"href":1451,"citation":10},{"text":1533}," A purchase specification that depends on a low CO reading at another temperature needs performance evidence for that condition.",{"kind":1016,"content":1535},[1536,1538],{"text":1537},"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":1426,"href":1313,"citation":10},{"kind":1540,"title":1541,"percentFS":1542,"gases":1543,"note":1561},"range_screen","Compare range, resolution and error",3,[1544,1553],{"key":1545,"label":1268,"spans":1546,"ranges":1549,"resolutions":1550,"exampleMaximum":1551,"exampleError":1552},"co",[1547,1548],100,1000,[1371,1381],[1374,1384],80,5,{"key":1554,"label":1234,"spans":1555,"ranges":1557,"resolutions":1558,"exampleMaximum":1559,"exampleError":1560},"h2s",[1556,1547],10,[1392,1371],[1374,1374],8,0.5,"This screen applies the selected %FS rating to the listed ranges. A different documented accuracy specification needs a separate assessment.",{"kind":1016,"content":1563},[1564,1566,1567],{"text":1565},"For example, covering 200 ppm while limiting absolute error to ±5 ppm gives no solution at ±3%FS. ",{"text":1426,"href":1313,"citation":10},{"text":1568}," 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":1570,"heading":1571,"paragraphs":1572,"blocks":1578},"solvent-vapor-exposure","Can a low %LEL reading rule out harmful solvent exposure?",[1573,1574,1575,1576,1577],"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.",[1579,1592,1640,1650,1666,1682,1697,1736],{"kind":1016,"content":1580},[1581,1583,1586,1588,1590],{"text":1582},"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":1584,"href":1585,"citation":10},"[S8]","#ref-s8",{"text":1587}," Using that LEL, even 1%LEL corresponds to 110 ppm. ",{"text":1589,"href":1585,"citation":10},"[S8; calculation]",{"text":1591}," A small reading on the flammability scale can therefore exceed the exposure reference.",{"kind":1053,"caption":1593,"headers":1594,"rows":1604,"source":1636},"n-Hexane at 10%LEL compared with US references",[1595,1598,1601],[1596],{"text":1597},"Value",[1599],{"text":1600},"Concentration",[1602],{"text":1603},"What the value describes",[1605,1616,1626],{"cells":1606},[1607,1610,1613],[1608],{"text":1609},"10%LEL of n-hexane",[1611],{"text":1612},"1,100 ppm",[1614],{"text":1615},"Flammability, by gas-property conversion; not a detector reading",{"cells":1617},[1618,1621,1623],[1619],{"text":1620},"NIOSH IDLH",[1622],{"text":1612},[1624],{"text":1625},"Immediately dangerous to life or health",{"cells":1627},[1628,1631,1633],[1629],{"text":1630},"NIOSH REL",[1632],{"text":1281},[1634],{"text":1635},"Recommended exposure limit over a workday",[1637,1638,1639],{"text":1124},{"text":1584,"citation":10,"href":1585},{"text":1517},{"kind":1016,"content":1641},[1642,1644,1645,1647,1648],{"text":1643},"At 10%LEL, the calculated n-hexane concentration reaches 1,100 ppm, the NIOSH immediately dangerous to life or health (IDLH) value. ",{"text":1589,"href":1585,"citation":10},{"text":1646}," OSHA 29 CFR 1910.146 also defines a flammable atmosphere above 10% of the lower flammable limit as hazardous in covered permit spaces. ",{"text":1021,"href":1022,"citation":10},{"text":1649}," Staying below that flammability boundary does not demonstrate control of toxic exposure.",{"kind":1016,"content":1651},[1652,1654,1657,1658,1661,1663,1664],{"text":1653},"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":1655,"href":1656,"citation":10},"[S10]","#ref-s10",{"text":1127},{"text":1659,"href":1660,"citation":10},"[S11]","#ref-s11",{"text":1662}," A sensor calibrated with methane needs its own response data for other combustible gases. ",{"text":1048,"href":1049,"citation":10},{"text":1665}," The selector below changes the LEL reference in the calculation, without modelling that sensor response.",{"kind":1667,"title":1668,"gases":1669,"note":1681},"lel_conversion","Same %LEL, different volume concentration",[1670,1673,1677],{"key":1671,"name":1672,"lelPercentVolume":1552},"methane","Methane",{"key":1674,"name":1675,"lelPercentVolume":1676},"propane","Propane",2.1,{"key":1678,"name":1679,"lelPercentVolume":1680},"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":1016,"content":1683},[1684,1686,1689,1690,1693,1694,1695],{"text":1685},"The conversion uses the published LEL references for methane, propane and n-hexane. ",{"text":1687,"href":1688,"citation":10},"[S12]","#ref-s12",{"text":1127},{"text":1691,"href":1692,"citation":10},"[S13]","#ref-s13",{"text":1127},{"text":1584,"href":1585,"citation":10},{"text":1696}," For an n-hexane application, the flammability requirement and the exposure requirement should therefore remain separate in the enquiry.",{"kind":1053,"caption":1698,"headers":1699,"rows":1709,"source":1732},"Two separate requirements for an n-hexane job",[1700,1703,1706],[1701],{"text":1702},"Requirement",[1704],{"text":1705},"Include in the enquiry",[1707],{"text":1708},"Evidence needed for the offered instrument",[1710,1721],{"cells":1711},[1712,1715,1718],[1713],{"text":1714},"Flammability",[1716],{"text":1717},"n-Hexane, %LEL scale and calibration gas.",[1719],{"text":1720},"Sensor-specific response to n-hexane; a gas-property conversion is not enough.",{"cells":1722},[1723,1726,1729],[1724],{"text":1725},"Exposure",[1727],{"text":1728},"n-Hexane in ppm, the applicable limit and its averaging period.",[1730],{"text":1731},"A ppm-level measurement method with matching performance data; a general “VOC” label is not enough.",[1733,1734,1735],{"text":1124},{"text":1048,"citation":10,"href":1049},{"text":1081},{"kind":1016,"content":1737},[1738,1740,1741,1742,1743,1745,1746],{"text":1739},"Our documents list VOC ranges from 0–20 ppm to 0–10,000 ppm, and both models have a built-in gas library. ",{"text":1312,"href":1313,"citation":10},{"text":1127},{"text":1338,"href":1339,"citation":10},{"text":1744}," 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":1312,"href":1313,"citation":10},{"text":1747}," That combination limit affects the model choice when both measurements are needed.",{"id":1749,"heading":1750,"paragraphs":1751,"blocks":1756},"carbon-dioxide-blind-spot","Why does a normal oxygen reading not rule out CO₂?",[1752,1753,1754,1755],"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 model section explains why adding CO₂ to O₂\u002FCO\u002FH₂S\u002F%LEL also depends on the model’s sensor arrangement.",[1757,1765,1830,1841,1848,1896],{"kind":1016,"content":1758},[1759,1761,1763],{"text":1760},"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":1762,"citation":10},"[Calculation]",{"text":1764}," At 3% vol CO₂, the resulting O₂ reading is still 20.27% vol.",{"kind":1053,"caption":1766,"headers":1767,"rows":1777,"source":1822},"Ideal displacement: CO₂ concentration and calculated oxygen reading",[1768,1771,1774],[1769],{"text":1770},"CO₂ in the mixture",[1772],{"text":1773},"Calculated O₂ reading",[1775],{"text":1776},"US reference at that CO₂ level",[1778,1789,1800,1811],{"cells":1779},[1780,1783,1786],[1781],{"text":1782},"0.5% vol (5,000 ppm)",[1784],{"text":1785},"20.80% vol",[1787],{"text":1788},"NIOSH REL and OSHA PEL: TWA 5,000 ppm",{"cells":1790},[1791,1794,1797],[1792],{"text":1793},"3.0% vol (30,000 ppm)",[1795],{"text":1796},"20.27% vol",[1798],{"text":1799},"NIOSH short-term REL: 30,000 ppm",{"cells":1801},[1802,1805,1808],[1803],{"text":1804},"4.0% vol (40,000 ppm)",[1806],{"text":1807},"20.06% vol",[1809],{"text":1810},"NIOSH IDLH: 40,000 ppm",{"cells":1812},[1813,1816,1819],[1814],{"text":1815},"6.7% vol (67,000 ppm)",[1817],{"text":1818},"19.50% vol",[1820],{"text":1821},"Above the IDLH; O₂ reaches the 19.5% vol boundary in OSHA 29 CFR 1910.146",[1823,1824,1825,1826,1829],{"text":1124},{"text":1021,"citation":10,"href":1022},{"text":1127},{"text":1827,"citation":10,"href":1828},"[S14]","#ref-s14",{"text":1081},{"kind":1016,"content":1831},[1832,1834,1836,1838,1839],{"text":1833},"At the NIOSH CO₂ IDLH of 40,000 ppm, the same calculation gives 20.06% vol O₂. ",{"text":1835,"href":1828,"citation":10},"[S14; calculation]",{"text":1837}," That is above the 19.5% vol oxygen-deficiency boundary in OSHA 29 CFR 1910.146 for covered permit spaces. ",{"text":1021,"href":1022,"citation":10},{"text":1840}," This example explains the blind spot; uniform mixing and oxygen-free CO₂ are calculation assumptions, not a prediction of a particular release.",{"kind":1016,"content":1842},[1843,1845,1846,1847],{"text":1844},"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":1312,"href":1313,"citation":10},{"text":1127},{"text":1338,"href":1339,"citation":10},{"kind":1053,"caption":1849,"headers":1850,"rows":1857,"source":1890},"Documented CO₂ ranges and the US references they reach",[1851,1854],[1852],{"text":1853},"CO₂ range",[1855],{"text":1856},"Highest US reference within the range",[1858,1866,1874,1882],{"cells":1859},[1860,1863],[1861],{"text":1862},"0–5,000 ppm",[1864],{"text":1865},"TWA 5,000 ppm, at full scale; the short-term REL and IDLH are above the range",{"cells":1867},[1868,1871],[1869],{"text":1870},"0–50,000 ppm",[1872],{"text":1873},"Short-term REL 30,000 ppm and IDLH 40,000 ppm",{"cells":1875},[1876,1879],[1877],{"text":1878},"0–5% vol",[1880],{"text":1881},"IDLH 40,000 ppm (4% vol)",{"cells":1883},[1884,1887],[1885],{"text":1886},"0–100% vol",[1888],{"text":1889},"All three references; check the error that applies near your decision value",[1891,1892,1893,1894,1895],{"text":1124},{"text":1338,"citation":10,"href":1339},{"text":1127},{"text":1827,"citation":10,"href":1828},{"text":1081},{"kind":1016,"content":1897},[1898,1900,1901,1902,1903,1905,1907,1910],{"text":1899},"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":1338,"href":1339,"citation":10},{"text":1127},{"text":1827,"href":1828,"citation":10},{"text":1904}," A range that reaches 40,000 ppm covers those higher reference concentrations, but range coverage alone does not establish accuracy. ",{"text":1906},"The ",{"text":1908,"href":1909},"model section","#detector-and-sampling-selection",{"text":1911}," explains why adding CO₂ to O₂\u002FCO\u002FH₂S\u002F%LEL also depends on the model’s sensor arrangement.",{"id":1913,"heading":1914,"paragraphs":1915,"blocks":1917},"different-or-extra-gases","When should a 4-gas meter carry different or extra gases?",[1916],"Change or add gases when the job has a hazard the standard four miss, such as CO₂, solvent vapor, sulfur dioxide or ammonia. Gas count is then part of model selection. BTYQ-MS104K-M and BTYQ-MS400-S are documented for one to four gases as standard, with expansion to five or six, under different sensor-combination rules. [S3] When a job needs more, the MS600-S pumped multigas detector is documented for one to seven gases as standard and eight or nine in expanded configurations. [S22] Whether a specific combination fits a given model is confirmed in the quotation.",[1918],{"kind":1016,"content":1919},[1920,1922,1924,1926,1928,1930,1932,1934,1935,1937,1939,1941,1944],{"text":1921},"Change or add gases when the job has a hazard the standard four miss, such as ",{"text":1923,"href":1079},"CO₂",{"text":1925},", ",{"text":1927,"href":1120},"solvent vapor",{"text":1929},", sulfur dioxide or ammonia. Gas count is then part of model selection. BTYQ-MS104K-M and BTYQ-MS400-S are documented for one to four gases as standard, with expansion to five or six, under different ",{"text":1931,"href":1909},"sensor-combination rules",{"text":1933},". ",{"text":1312,"href":1313,"citation":10},{"text":1936}," When a job needs more, the ",{"text":1938,"href":216},"MS600-S",{"text":1940}," pumped multigas detector is documented for one to seven gases as standard and eight or nine in expanded configurations. ",{"text":1942,"href":1943,"citation":10},"[S22]","#ref-s22",{"text":1945}," Whether a specific combination fits a given model is confirmed in the quotation.",{"id":1947,"heading":1948,"paragraphs":1949,"blocks":1959},"detector-and-sampling-selection","Which model and sampling arrangement fit the job?",[1950,1951,1952,1953,1954,1955,1956,1957,1958],"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.",[1960,1967,1972,1982,1990,1998,2002,2010,2015,2022,2026,2033,2072,2079,2083,2093,2097,2108,2161,2172],{"kind":1016,"content":1961},[1962,1964,1965],{"text":1963},"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":1312,"href":1313,"citation":10},{"text":1966}," Choose between those arrangements after deciding where the sample must come from and which gases must be measured together.",{"kind":1968,"level":1542,"content":1969},"heading",[1970],{"text":1971},"BTYQ-MS104K-M: diffusion with an external pump",{"kind":1016,"content":1973},[1974,1976,1977,1979,1980],{"text":1975},"The standard accessories include an external pump and a filter. ",{"text":1312,"href":1313,"citation":10},{"text":1978}," The MB20A pump identified in the type-evaluation report is rated at 500 mL\u002Fmin. ",{"text":1659,"href":1660,"citation":10},{"text":1981}," The photographs show the instrument by itself and with the pump attached.",{"kind":1983,"items":1984},"images",[1985],{"url":1986,"alt":1987,"caption":1988,"width":1989,"height":1989},"\u002Fimages\u002Fresources\u002Fw04\u002Fimage-2-1f31d2c6c05a.webp","BTYQ-MS104K-M portable gas detector, front view","Instrument",1600,{"kind":1983,"items":1991},[1992],{"url":1993,"alt":1994,"caption":1995,"width":1996,"height":1997},"\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":1968,"level":1542,"content":1999},[2000],{"text":2001},"BTYQ-MS400-S: built-in pump with diffusion mode",{"kind":1016,"content":2003},[2004,2006,2007,2009],{"text":2005},"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":1312,"href":1313,"citation":10},{"text":2008}," 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":1312,"href":1313,"citation":10},{"kind":1983,"items":2011},[2012],{"url":2013,"alt":2014,"caption":1988,"width":1989,"height":1989},"\u002Fimages\u002Fresources\u002Fw04\u002Fimage-4-545ca174308f.webp","BTYQ-MS400-S portable gas detector, front view",{"kind":1983,"items":2016},[2017],{"url":2018,"alt":2019,"caption":2020,"width":2021,"height":2021},"\u002Fimages\u002Fresources\u002Fw04\u002Fimage-5-3c0125f77907.webp","BTYQ-MS400-S with a gooseneck sampling probe and inlet filter attached","Sampling probe attached",800,{"kind":1968,"level":1542,"content":2023},[2024],{"text":2025},"Gas combinations can decide the model before sampling does",{"kind":1016,"content":2027},[2028,2030,2031],{"text":2029},"Our specification table describes both models as configurable for one to four gases, with expansion to five or six. ",{"text":1312,"href":1313,"citation":10},{"text":2032}," 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":1053,"caption":2034,"headers":2035,"rows":2045,"source":2068},"Documented sensor combination rules",[2036,2039,2042],[2037],{"text":2038},"Model",[2040],{"text":2041},"Documented combinations",[2043],{"text":2044},"What this means for O₂ + CO + H₂S + %LEL",[2046,2057],{"cells":2047},[2048,2051,2054],[2049],{"text":2050},"BTYQ-MS104K-M",[2052],{"text":2053},"One EX, CO₂, PID or infrared sensor plus three electrochemical sensors; or four electrochemical sensors; or CO\u002FH₂S plus three other gases.",[2055],{"text":2056},"The %LEL sensor uses the single EX, CO₂, PID or infrared position. Adding CO₂ or a PID measurement is outside the documented combinations.",{"cells":2058},[2059,2062,2065],[2060],{"text":2061},"BTYQ-MS400-S",[2063],{"text":2064},"Plug-in digital sensors, automatically identified, in any combination.",[2066],{"text":2067},"A fifth measurement such as CO₂ is an expanded configuration; we confirm it in the quotation.",[2069,2070,2071],{"text":1124},{"text":1312,"citation":10,"href":1313},{"text":1081},{"kind":1016,"content":2073},[2074,2076,2077],{"text":2075},"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":1312,"href":1313,"citation":10},{"text":2078}," 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":1968,"level":1542,"content":2080},[2081],{"text":2082},"Compare runtime for the configuration you will use",{"kind":1016,"content":2084},[2085,2087,2088,2090,2091],{"text":2086},"The more-than-100-hour figure for BTYQ-MS104K-M applies to diffusion operation without catalytic, infrared or PID sensors. ",{"text":1312,"href":1313,"citation":10},{"text":2089}," 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":1312,"href":1313,"citation":10},{"text":2092}," Because the two figures describe different loads, the quotation needs runtime for the proposed gas configuration and sampling mode.",{"kind":1968,"level":1542,"content":2094},[2095],{"text":2096},"Allow for the complete sampling path",{"kind":1016,"content":2098},[2099,2101,2102,2103,2104,2105,2106],{"text":2100},"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":1446,"href":1447,"citation":10},{"text":1127},{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":1655,"href":1656,"citation":10},{"text":2107}," T90 means the time to reach 90% of the final reading.",{"kind":1053,"caption":2109,"headers":2110,"rows":2120,"source":2153},"Response times measured in type evaluation",[2111,2114,2117],[2112],{"text":2113},"Model and gas",[2115],{"text":2116},"Sampling mode in the test",[2118],{"text":2119},"Measured response time",[2121,2132,2143],{"cells":2122},[2123,2126,2129],[2124],{"text":2125},"BTYQ-MS104K-M, CO 0–1000 μmol\u002Fmol",[2127],{"text":2128},"Diffusion",[2130],{"text":2131},"13–14 s average, three units",{"cells":2133},[2134,2137,2140],[2135],{"text":2136},"BTYQ-MS400-S, CO 0–1000 μmol\u002Fmol",[2138],{"text":2139},"Pumped",[2141],{"text":2142},"10–11 s average, three units",{"cells":2144},[2145,2148,2150],[2146],{"text":2147},"BTYQ-MS400-S, methane 0–100%LEL",[2149],{"text":2139},[2151],{"text":2152},"8–10 s average, three units",[2154,2155,2156,2157,2158,2159,2160],{"text":1124},{"text":1446,"citation":10,"href":1447},{"text":1127},{"text":1450,"citation":10,"href":1451},{"text":1127},{"text":1655,"citation":10,"href":1656},{"text":1081},{"kind":1016,"content":2162},[2163,2165,2166,2167,2168,2169,2170],{"text":2164},"These results were measured at 20–24 °C and do not include an added remote-sampling hose. ",{"text":1446,"href":1447,"citation":10},{"text":1127},{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":1655,"href":1656,"citation":10},{"text":2171}," 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":1016,"content":2173},[2174,2175,2176,2178,2180,2182,2184],{"text":1906},{"text":1040,"href":48},{"text":2177}," compares worn and remote monitoring, kit weight and runtime, and pre-use checks. For remote testing through a pump, probe and hose, the ",{"text":2179,"href":40},"confined-space guide",{"text":2181}," 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":2183,"href":300},"wastewater gas sampling guide",{"text":2185},". Those checks follow from the sampling path selected here.",{"id":2187,"heading":2188,"paragraphs":2189,"blocks":2192},"explosion-protection-records","Which explosion-protection record applies to the offered detector?",[2190,2191],"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.",[2193,2206,2248],{"kind":1016,"content":2194},[2195,2197,2200,2201,2204],{"text":2196},"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":2198,"href":2199,"citation":10},"[S15]","#ref-s15",{"text":1127},{"text":2202,"href":2203,"citation":10},"[S16]","#ref-s16",{"text":2205}," Those conditions need to be included in the project’s certificate review.",{"kind":1053,"caption":2207,"headers":2208,"rows":2217,"source":2242},"Model-specific certificate check — Chinese GB\u002FT records",[2209,2211,2214],[2210],{"text":2038},[2212],{"text":2213},"Certificate and gas-atmosphere marking",[2215],{"text":2216},"Scope to keep",[2218,2231],{"cells":2219},[2220,2222,2228],[2221],{"text":2050},[2223,2226],{"text":2224,"href":2225},"CCRI 24.2941X","\u002Fdocuments\u002Fcertificates\u002Fcertificate-ccri-24-2941x.pdf",{"text":2227},": Ex ia IIC T4 Ga.",[2229],{"text":2230},"The identified version only; carry the X special conditions into your document review.",{"cells":2232},[2233,2235,2240],[2234],{"text":2061},[2236,2239],{"text":2237,"href":2238},"CCRI 25.2157X","\u002Fdocuments\u002Fcertificates\u002Fcertificate-ccri-25-2157x.pdf",{"text":2227},[2241],{"text":2230},[2243,2244,2245,2246,2247],{"text":1124},{"text":2198,"citation":10,"href":2199},{"text":1127},{"text":2202,"citation":10,"href":2203},{"text":1081},{"kind":1016,"content":2249},[2250,2252,2253,2254,2255],{"text":2251},"Neither of these records is an ATEX, IECEx or US approval. ",{"text":2198,"href":2199,"citation":10},{"text":1127},{"text":2202,"href":2203,"citation":10},{"text":2256}," 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":2258,"heading":2259,"paragraphs":2260,"blocks":2266},"configuration-enquiry","What should I send with a configuration enquiry?",[2261,2262,2263,2264,2265],"A useful enquiry identifies which gases must be measured together, each range and the permitted error. It also states whether the monitor will sample by diffusion where it is worn or placed, or by pump through a probe or hose, because that choice can decide the model. Add the required operating period and approval scheme so we can propose a configuration and identify the supporting records. Unknown requirements can remain open.","Calibration gas belongs in the enquiry too. OSHA guidance recommends a bump test or calibration check before each day's use [S20]; the pre-use checks section of the personal gas monitoring guide explains what each check proves.","When a 4-gas instrument is bumped or calibrated from one mixed cylinder, the concentrations in that mixture are not universal. OSHA's technical manual advises confirming that the span gas is intended for the meter make and model, because in a multi-gas mixture some gases can affect other sensors in the same meter. [S1] Eranntex calibrates to the test-gas concentrations the customer specifies, such as those of the cylinder your program already stocks. Without a customer specification, we calibrate to the concentrations of the applicable Chinese national (GB) standard. [S21] Either way, the concentrations are stated with the quoted configuration. Test gas should be certified with a standard traceable to NIST, and reactive gases such as H₂S remain stable for only a limited period, so the cylinder's expiry date matters. [S20]","For the %LEL sensor, the calibration gas also sets the scale. A combustible-gas reading is a percentage of the LEL of the gas used for calibration. When the target gas differs, OSHA's manual recommends calibrating with that gas where possible, or applying the manufacturer's correction data. [S1] Our %LEL type evaluations for BTYQ-MS104K-M and BTYQ-MS400-S used methane. [S10] [S11] We calibrate the %LEL sensor on the reference gas the customer needs, for example methane or pentane, so name that gas in the enquiry. [S21]","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.",[2267,2275,2289,2300,2313,2328],{"kind":1016,"content":2268},[2269,2271,2273],{"text":2270},"A useful enquiry identifies which gases must be measured together, each range and the permitted error. It also states whether the monitor will sample by diffusion where it is worn or placed, or by pump through a probe or hose, because that choice can decide the ",{"text":2272,"href":1909},"model",{"text":2274},". Add the required operating period and approval scheme so we can propose a configuration and identify the supporting records. Unknown requirements can remain open.",{"kind":1016,"content":2276},[2277,2279,2281,2284,2286,2287],{"text":2278,"strong":10},"Calibration gas belongs in the enquiry too.",{"text":2280}," OSHA guidance recommends a bump test or calibration check before each day's use ",{"text":2282,"href":2283,"citation":10},"[S20]","#ref-s20",{"text":2285},"; the pre-use checks section of the ",{"text":1040,"href":48},{"text":2288}," explains what each check proves.",{"kind":1016,"content":2290},[2291,2293,2294,2296,2297,2299],{"text":2292},"When a 4-gas instrument is bumped or calibrated from one mixed cylinder, the concentrations in that mixture are not universal. OSHA's technical manual advises confirming that the span gas is intended for the meter make and model, because in a multi-gas mixture some gases can affect other sensors in the same meter. ",{"text":1048,"href":1049,"citation":10},{"text":2295}," Eranntex calibrates to the test-gas concentrations the customer specifies, such as those of the cylinder your program already stocks. Without a customer specification, we calibrate to the concentrations of the applicable Chinese national (GB) standard. ",{"text":1317,"href":1318,"citation":10},{"text":2298}," Either way, the concentrations are stated with the quoted configuration. Test gas should be certified with a standard traceable to NIST, and reactive gases such as H₂S remain stable for only a limited period, so the cylinder's expiry date matters. ",{"text":2282,"href":2283,"citation":10},{"kind":1016,"content":2301},[2302,2304,2305,2307,2308,2309,2310,2312],{"text":2303},"For the %LEL sensor, the calibration gas also sets the scale. A combustible-gas reading is a percentage of the LEL of the gas used for calibration. When the target gas differs, OSHA's manual recommends calibrating with that gas where possible, or applying the manufacturer's correction data. ",{"text":1048,"href":1049,"citation":10},{"text":2306}," Our %LEL type evaluations for BTYQ-MS104K-M and BTYQ-MS400-S used methane. ",{"text":1655,"href":1656,"citation":10},{"text":1127},{"text":1659,"href":1660,"citation":10},{"text":2311}," We calibrate the %LEL sensor on the reference gas the customer needs, for example methane or pentane, so name that gas in the enquiry. ",{"text":1317,"href":1318,"citation":10},{"kind":2314,"title":2315,"fields":2316,"contextFields":2322,"rowCount":2326,"note":2327},"enquiry","Prepare a configuration enquiry",[2317,2318,2319,2320,2321],"Required gas","Range and unit","Permitted error \u002F time basis","Must be measured with","Evidence still needed",[2323,2324,2325],"Sampling task, tubing and filters","Operating conditions and required duration","Approval scheme and configuration scope",4,"Preparing text keeps the entries on this page. Copy the result into your RFQ when ready; no enquiry is submitted here.",{"kind":1016,"content":2329},[2330,2332,2334,2336,2338,2340,2342,2344,2346],{"text":2331},"Copy the worksheet into the ",{"text":2333,"href":308},"configuration RFQ",{"text":2335},", or use the ",{"text":2337,"href":274},"gas detector quotation checklist",{"text":2339}," for the remaining order details. The ",{"text":2341,"href":200},"BTYQ-MS104K-M product page",{"text":2343}," and ",{"text":2345,"href":212},"BTYQ-MS400-S product page",{"text":2347}," provide the model specifications to review alongside the proposed combination.",{"id":2349,"heading":2350,"paragraphs":2351,"blocks":2353},"references","References",[2352],"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.",[2354,2357],{"kind":1016,"content":2355},[2356],{"text":2352},{"kind":1053,"caption":2358,"headers":2359,"rows":2369},"Sources cited in this guide",[2360,2363,2366],[2361],{"text":2362},"Ref.",[2364],{"text":2365},"Source",[2367],{"text":2368},"What it supports",[2370,2383,2396,2415,2427,2440,2453,2466,2479,2492,2505,2518,2531,2544,2557,2569,2581,2594,2607,2620,2633,2645],{"id":2371,"cells":2372},"ref-s1",[2373,2376,2380],[2374],{"text":2375},"S1",[2377],{"text":2378,"href":2379},"OSHA Technical Manual, Section II, Chapter 3","https:\u002F\u002Fwww.osha.gov\u002Fotm\u002Fsection-2-health-hazards\u002Fchapter-3",[2381],{"text":2382},"US guidance on direct-reading instruments; %LEL of the calibration gas; span gas for the make and model; oxygen in normal air; usual oxygen alarm points; PID reference gas.",{"id":2384,"cells":2385},"ref-s2",[2386,2389,2393],[2387],{"text":2388},"S2",[2390],{"text":2391,"href":2392},"NIOSH Pocket Guide: Introduction","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fnpg\u002Fpgintrod.html",[2394],{"text":2395},"Definitions of TWA, STEL and ceiling.",{"id":2397,"cells":2398},"ref-s3",[2399,2402,2412],[2400],{"text":2401},"S3",[2403,2405,2407,2408,2410],{"text":2404},"Eranntex product specification table, 2026-06-15 edition. Published values also appear on the ",{"text":2050,"href":2406},"https:\u002F\u002Fwww.eranntex.com\u002Fproducts\u002Fms104k-m\u002F",{"text":2343},{"text":2061,"href":2409},"https:\u002F\u002Fwww.eranntex.com\u002Fproducts\u002Fms400-s\u002F",{"text":2411}," product pages.",[2413],{"text":2414},"Configurations, typical accuracy, sampling, accessories and runtime, with their recorded conditions.",{"id":2416,"cells":2417},"ref-s4",[2418,2421,2424],[2419],{"text":2420},"S4",[2422],{"text":2423},"Eranntex model documents: gas-range appendices (Eranntex record).",[2425],{"text":2426},"Single gas-and-range options; not confirmed gas combinations.",{"id":2428,"cells":2429},"ref-s5",[2430,2433,2437],[2431],{"text":2432},"S5",[2434],{"text":2435,"href":2436},"NIOSH Pocket Guide: Carbon monoxide","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fnpg\u002Fnpgd0105.html",[2438],{"text":2439},"REL, ceiling and OSHA PEL with their averaging periods.",{"id":2441,"cells":2442},"ref-s6",[2443,2446,2450],[2444],{"text":2445},"S6",[2447],{"text":2448,"href":2449},"Type-evaluation report HYQ202538502, Guangdong Institute of Metrology, 2025-02-20 (PDF, Chinese).","\u002Fdocuments\u002Ftest-reports\u002Fms104k-m-co-type-evaluation-hyq202538502.pdf",[2451],{"text":2452},"BTYQ-MS104K-M, CO 0–1000 μmol\u002Fmol: three units, 20–24 °C, diffusion; laboratory result.",{"id":2454,"cells":2455},"ref-s7",[2456,2459,2463],[2457],{"text":2458},"S7",[2460],{"text":2461,"href":2462},"Type-evaluation report HYQ202538544, Guangdong Institute of Metrology, 2026-01-22 (PDF, Chinese).","\u002Fdocuments\u002Ftest-reports\u002Fms400-s-co-type-evaluation-hyq202538544.pdf",[2464],{"text":2465},"BTYQ-MS400-S, CO 0–1000 μmol\u002Fmol: three units, 21–23 °C, pumped; laboratory result.",{"id":2467,"cells":2468},"ref-s8",[2469,2472,2476],[2470],{"text":2471},"S8",[2473],{"text":2474,"href":2475},"NIOSH Pocket Guide: n-Hexane","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fnpg\u002Fnpgd0322.html",[2477],{"text":2478},"REL, IDLH and LEL; not a sensor response factor.",{"id":2480,"cells":2481},"ref-s9",[2482,2485,2489],[2483],{"text":2484},"S9",[2486],{"text":2487,"href":2488},"OSHA 29 CFR 1910.146","https:\u002F\u002Fwww.osha.gov\u002Flaws-regs\u002Fregulations\u002Fstandardnumber\u002F1910\u002F1910.146",[2490],{"text":2491},"Hazardous-atmosphere definitions and the pre-entry test order for covered US permit spaces.",{"id":2493,"cells":2494},"ref-s10",[2495,2498,2502],[2496],{"text":2497},"S10",[2499],{"text":2500,"href":2501},"Type-evaluation report HYQ202538576, Guangdong Institute of Metrology, 2026-01-26 (PDF, Chinese).","\u002Fdocuments\u002Ftest-reports\u002Fms400-s-methane-type-evaluation-hyq202538576.pdf",[2503],{"text":2504},"BTYQ-MS400-S, methane 0–100%LEL: catalytic sensor, three units, 20–22 °C.",{"id":2506,"cells":2507},"ref-s11",[2508,2511,2515],[2509],{"text":2510},"S11",[2512],{"text":2513,"href":2514},"Type-evaluation report F24-164-JJ (PDF, Chinese).","\u002Fdocuments\u002Ftest-reports\u002Fms104k-m-methane-type-evaluation-f24-164-jj.pdf",[2516],{"text":2517},"BTYQ-MS104K-M, methane 0–100%LEL; lists the MB20A external pump rated 500 mL\u002Fmin.",{"id":2519,"cells":2520},"ref-s12",[2521,2524,2528],[2522],{"text":2523},"S12",[2525],{"text":2526,"href":2527},"NIOSH: Methane monitoring during roof bolting","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fengcontrols\u002Fecd\u002Fdetail153.html",[2529],{"text":2530},"Methane LEL of 5% by volume, used for conversion only.",{"id":2532,"cells":2533},"ref-s13",[2534,2537,2541],[2535],{"text":2536},"S13",[2538],{"text":2539,"href":2540},"NIOSH Pocket Guide: Propane","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fnpg\u002Fnpgd0524.html",[2542],{"text":2543},"Propane LEL of 2.1% by volume, used for conversion only.",{"id":2545,"cells":2546},"ref-s14",[2547,2550,2554],[2548],{"text":2549},"S14",[2551],{"text":2552,"href":2553},"NIOSH Pocket Guide: Carbon dioxide","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fnpg\u002Fnpgd0103.html",[2555],{"text":2556},"REL, short-term REL, OSHA PEL and IDLH.",{"id":2558,"cells":2559},"ref-s15",[2560,2563,2566],[2561],{"text":2562},"S15",[2564],{"text":2565,"href":2225},"Certificate CCRI 24.2941X (PDF)",[2567],{"text":2568},"Chinese GB\u002FT explosion-protection certificate for BTYQ-MS104K-M; identified version and X conditions only.",{"id":2570,"cells":2571},"ref-s16",[2572,2575,2578],[2573],{"text":2574},"S16",[2576],{"text":2577,"href":2238},"Certificate CCRI 25.2157X (PDF)",[2579],{"text":2580},"Chinese GB\u002FT explosion-protection certificate for BTYQ-MS400-S; identified version and X conditions only.",{"id":2582,"cells":2583},"ref-s17",[2584,2587,2591],[2585],{"text":2586},"S17",[2588],{"text":2589,"href":2590},"OSHA 29 CFR 1910.146 Appendix B","https:\u002F\u002Fwww.osha.gov\u002Flaws-regs\u002Fregulations\u002Fstandardnumber\u002F1910\u002F1910.146AppB",[2592],{"text":2593},"Why oxygen is tested first and combustible gas second.",{"id":2595,"cells":2596},"ref-s18",[2597,2600,2604],[2598],{"text":2599},"S18",[2601],{"text":2602,"href":2603},"NIOSH Pocket Guide: Hydrogen sulfide","https:\u002F\u002Fwww.cdc.gov\u002Fniosh\u002Fnpg\u002Fnpgd0337.html",[2605],{"text":2606},"REL ceiling 10 ppm (10 minutes), IDLH 100 ppm; smell cannot be relied on.",{"id":2608,"cells":2609},"ref-s19",[2610,2613,2617],[2611],{"text":2612},"S19",[2614],{"text":2615,"href":2616},"OSHA 29 CFR 1910.1000 Table Z-2","https:\u002F\u002Fwww.osha.gov\u002Flaws-regs\u002Fregulations\u002Fstandardnumber\u002F1910\u002F1910.1000TABLEZ2",[2618],{"text":2619},"H₂S ceiling 20 ppm; 50 ppm peak for up to 10 minutes.",{"id":2621,"cells":2622},"ref-s20",[2623,2626,2630],[2624],{"text":2625},"S20",[2627],{"text":2628,"href":2629},"OSHA SHIB 11-26-2024: Calibrating and Testing Direct-Reading Portable Gas Monitors","https:\u002F\u002Fwww.osha.gov\u002Fpublications\u002Fshib093013",[2631],{"text":2632},"Bump test or calibration check before each day’s use; certified traceable test gas. Advisory guidance, not a regulation.",{"id":2634,"cells":2635},"ref-s21",[2636,2639,2642],[2637],{"text":2638},"S21",[2640],{"text":2641},"Eranntex calibration and alarm-configuration practice (Eranntex record).",[2643],{"text":2644},"Alarm points set to customer values; test-gas concentrations to customer specification or the Chinese GB standard; %LEL reference gas per customer need.",{"id":2646,"cells":2647},"ref-s22",[2648,2651,2658],[2649],{"text":2650},"S22",[2652,2654,2657],{"text":2653},"Eranntex product specification table, BTYQ-MS600-S. Published values also appear on the ",{"text":2655,"href":2656},"MS600-S product page","https:\u002F\u002Fwww.eranntex.com\u002Fproducts\u002Fms600-s\u002F",{"text":1081},[2659],{"text":2660},"Standard and expanded gas counts; pumped sampling.",[2662,2666,2670,2674,2677,2681],{"id":2663,"question":2664,"answer":2665},"w04-faq-1","Can a 4-gas monitor detect CO₂?","A 4-gas monitor configured for O₂, CO, H₂S and %LEL does not measure CO₂, and its oxygen reading cannot stand in for a CO₂ measurement. If oxygen-free CO₂ displaces air evenly, CO₂ at 40,000 ppm (the NIOSH IDLH) still leaves about 20.06% oxygen, which is above the 19.5% alarm boundary. Where CO₂ is part of the hazard, the instrument needs a CO₂ sensor with a suitable range, and the model must allow that sensor alongside the other four.",{"id":2667,"question":2668,"answer":2669},"w04-faq-2","Should I choose the widest available CO range?","Not by default. Choose a CO range that covers the highest concentration the job requires, then compare accuracy at the concentrations you will act on. At a typical ±3%FS rating, 0–100 ppm gives ±3 ppm and 0–1000 ppm gives ±30 ppm. Our 0–1000 μmol\u002Fmol type-evaluation reports state a separate maximum permissible error but were tested at 150, 300 and 700 μmol\u002Fmol, so they do not establish accuracy near 35 ppm.",{"id":2671,"question":2672,"answer":2673},"w04-faq-3","Does a 10%LEL alarm protect workers from solvent exposure?","No. A %LEL alarm addresses flammability only. For n-hexane, 10%LEL corresponds to 1,100 ppm, which is the NIOSH IDLH and 22 times the 50 ppm NIOSH TWA reference. The conversion also assumes the sensor responds to n-hexane as it does to its calibration gas, which a methane-calibrated sensor does not guarantee. Solvent exposure needs a separate ppm-level measurement, such as a PID with response data for that solvent.",{"id":2675,"question":1172,"answer":2676},"w04-faq-4","The set points are configured for each gas, against the limits that apply to the site. In the US, OSHA treats oxygen below 19.5% or above 23.5% by volume, and combustible gas above 10% of its lower flammable limit, as hazardous in a permit space. H₂S has a NIOSH 10 ppm 10-minute ceiling and an OSHA 20 ppm ceiling. CO has a NIOSH 35 ppm TWA and 200 ppm ceiling, and an OSHA 50 ppm TWA. TWA values belong to the TWA alarm mode and ceiling values to the instant alarm. Other countries publish different limits. Eranntex sets each instrument's default alarm points to the values the customer specifies.",{"id":2678,"question":2679,"answer":2680},"w04-faq-5","What calibration gas does a 4-gas detector need?","Certified test gas for each of the four sensors, either as one mixed cylinder or as separate cylinders. The concentrations depend on the instrument make, model and configured ranges, so a generic mix is not automatically suitable. Eranntex calibrates to the concentrations the customer specifies, and otherwise to the applicable Chinese national (GB) standard. The %LEL scale is relative to its calibration gas, such as methane or pentane, so name the reference gas when you order. A CO₂ sensor or a PID added as a fifth measurement needs its own test gas; a PID is normally calibrated with isobutylene.",{"id":2682,"question":2683,"answer":2684},"w04-faq-6","What should a 4-gas meter read in clean air?","Normal air contains about 20.9% oxygen, so in clean outdoor air the O₂ reading should sit close to 20.9% by volume. CO, H₂S and %LEL should read zero or within the instrument's stated zero tolerance. A reading that differs in clean air needs checking before use, and a bump test or calibration check is the way to confirm the sensors respond. A clean-air reading is a quick orientation check, not proof of accuracy.",{"title":2686,"description":2687},"What Does a 4-Gas Monitor Detect? Gases & Limits","A 4-gas meter reads oxygen, combustible gas (%LEL), H₂S and CO. See why those four, the US limits alarms are set against, and when to add CO₂ or a PID.","split","2026-11-10",{"market":323,"locale":324,"publication":2691,"title":2692,"summary":2693,"seo":2694,"mediaLayout":2688,"reviewedOnPublication":10,"updatedOn":2689,"body":2697,"faq":4138},{"status":568,"indexable":10},"四合一气体检测仪能检测什么？气体、限值与选型","标准四合一气体检测仪（常称为 4-gas meter）测量氧气（O₂，体积分数 %）、以爆炸下限百分比表示的可燃气体（%LEL）、硫化氢（H₂S，ppm）和一氧化碳（CO，ppm）。这些读数对应美国受限空间规定要求检测的大气危害：氧气体积分数低于 19.5% 或高于 23.5%、可燃气体超过其燃烧下限的 10%，以及有毒气体超过其暴露限值。标准四气体配置不测量 CO₂，较低的 %LEL 读数也不能说明溶剂蒸气浓度低于其暴露限值。如果现场存在 CO₂ 或溶剂暴露风险，仪器需要增加传感器。",{"title":2695,"description":2696},"四合一气体检测仪能检测什么？气体与限值","四合一气体检测仪测量氧气、可燃气体（%LEL）、H₂S 和 CO。了解为何选择这四项、报警设置所依据的美国限值，以及何时需要增加 CO₂ 测量或 PID。",[2698,2844,2978,3194,3352,3497,3526,3753,3815,3899],{"id":1007,"heading":2699,"paragraphs":2700,"blocks":2705},"四项读数分别说明什么？",[2701,2702,2703,2704],"四个传感器对应 OSHA 许可空间标准规定的进入前空气检测顺序：先检测氧气，再检测可燃气体和蒸气，最后检测有毒气体和蒸气。[S9] 氧气排在第一位，因为多数可燃气体传感器需要氧气才能给出可靠读数。可燃气体排在第二位，因为火灾或爆炸通常是更直接的威胁。[S17] 标准四合一配置中的两种有毒气体是 H₂S 和 CO。对于 H₂S，仪器还替代了嗅觉判断；NIOSH 提醒，不能依靠嗅觉，因为即使气体仍然存在，鼻子也会很快对臭鸡蛋气味产生嗅觉疲劳。[S18] 受限空间进入指南介绍进入前检测，个人气体监测指南介绍作业期间佩戴检测仪。","四项读数使用不同的单位。氧气以体积百分比表示，CO 和 H₂S 以百万分率（ppm）表示。可燃气体读数表示相对于校准气体爆炸下限（LEL）的百分比。[S1] 各项读数说明的问题不同，不能互相代替。","对于 CO 和 H₂S，当前读数与平均暴露浓度描述的是不同的情况。峰值显示监测期间曾达到的浓度；时间加权平均值还考虑该浓度持续的时间。[S2] 当仪器记录到短暂的高读数，而平均值低得多时，这一区别很重要。H₂S 峰值与 TWA 记录指南详细比较了两者。","比较暴露限值和读数之前，先确定两者各自对应的时间段。下列美国参考资料区分了时间加权平均值（TWA）、短时间接触限值（STEL）和最高限值。[S2] 这些参考值并非建议的出厂报警设置。",[2706,2726,2733,2807,2817,2824],{"kind":1016,"content":2707},[2708,2710,2711,2713,2714,2716,2717,2718,2720,2722,2724],{"text":2709},"四个传感器对应 OSHA 许可空间标准规定的进入前空气检测顺序：先检测氧气，再检测可燃气体和蒸气，最后检测有毒气体和蒸气。",{"text":1021,"href":1022,"citation":10},{"text":2712}," 氧气排在第一位，因为多数可燃气体传感器需要氧气才能给出可靠读数。可燃气体排在第二位，因为火灾或爆炸通常是更直接的威胁。",{"text":1026,"href":1027,"citation":10},{"text":2715}," 标准四合一配置中的两种有毒气体是 H₂S 和 CO。对于 H₂S，仪器还替代了嗅觉判断；NIOSH 提醒，不能依靠嗅觉，因为即使气体仍然存在，鼻子也会很快对臭鸡蛋气味产生嗅觉疲劳。",{"text":1031,"href":1032,"citation":10},{"text":1127},{"text":2719,"href":40},"受限空间进入指南",{"text":2721},"介绍进入前检测，",{"text":2723,"href":48},"个人气体监测指南",{"text":2725},"介绍作业期间佩戴检测仪。",{"kind":1016,"content":2727},[2728,2730,2731],{"text":2729},"四项读数使用不同的单位。氧气以体积百分比表示，CO 和 H₂S 以百万分率（ppm）表示。可燃气体读数表示相对于校准气体爆炸下限（LEL）的百分比。",{"text":1048,"href":1049,"citation":10},{"text":2732}," 各项读数说明的问题不同，不能互相代替。",{"kind":1053,"caption":2734,"headers":2735,"rows":2745,"source":2800},"各项读数能说明什么，不能说明什么",[2736,2739,2742],[2737],{"text":2738},"读数",[2740],{"text":2741},"读数能说明什么",[2743],{"text":2744},"读数不能说明什么",[2746,2761,2772,2786],{"cells":2747},[2748,2751,2754],[2749],{"text":2750},"氧气（O₂），% vol",[2752],{"text":2753},"空气是否缺氧或富氧。",[2755,2757,2759],{"text":2756},"哪种气体置换了氧气，或 CO₂ 的浓度是多少。参见",{"text":2758,"href":1079},"CO₂ 部分",{"text":2760},"。",{"cells":2762},[2763,2766,2769],[2764],{"text":2765},"一氧化碳（CO），ppm",[2767],{"text":2768},"传感器处当前的 CO 浓度。",[2770],{"text":2771},"时间加权平均值，除非仪器按指定时间段计算该值。",{"cells":2773},[2774,2777,2780],[2775],{"text":2776},"硫化氢（H₂S），ppm",[2778],{"text":2779},"传感器处当前的 H₂S 浓度。",[2781,2783,2785],{"text":2782},"记录的峰值与 TWA 有什么关系。参见",{"text":2784,"href":278},"H₂S 峰值与 TWA 记录指南",{"text":2760},{"cells":2787},[2788,2791,2794],[2789],{"text":2790},"可燃气体，%LEL",[2792],{"text":2793},"相对于校准气体爆炸下限的可燃性。",[2795,2797,2799],{"text":2796},"同一种蒸气造成的毒性暴露。参见",{"text":2798,"href":1120},"溶剂部分",{"text":2760},[2801,2803,2804,2805,2806],{"text":2802},"来源：",{"text":1048,"citation":10,"href":1049},{"text":1127},{"text":1129,"citation":10,"href":1130},{"text":2760},{"kind":1016,"content":2808},[2809,2811,2812,2814,2815],{"text":2810},"对于 CO 和 H₂S，当前读数与平均暴露浓度描述的是不同的情况。峰值显示监测期间曾达到的浓度；时间加权平均值还考虑该浓度持续的时间。",{"text":1129,"href":1130,"citation":10},{"text":2813}," 当仪器记录到短暂的高读数，而平均值低得多时，这一区别很重要。",{"text":2784,"href":278},{"text":2816},"详细比较了两者。",{"kind":1016,"content":2818},[2819,2821,2822],{"text":2820},"比较暴露限值和读数之前，先确定两者各自对应的时间段。下列美国参考资料区分了时间加权平均值（TWA）、短时间接触限值（STEL）和最高限值。",{"text":1129,"href":1130,"citation":10},{"text":2823}," 这些参考值并非建议的出厂报警设置。",{"kind":1150,"ordered":569,"items":2825},[2826,2832,2838],[2827,2829,2831],{"text":2828,"strong":10},"TWA：",{"text":2830}," 指定时间段内的时间加权平均值。",{"text":1129,"citation":10,"href":1130},[2833,2835,2837],{"text":2834,"strong":10},"STEL：",{"text":2836}," 短时间平均值，通常以 15 分钟计算。",{"text":1129,"citation":10,"href":1130},[2839,2841,2843],{"text":2840,"strong":10},"最高限值：",{"text":2842}," 任何时候都不应超过的数值。",{"text":1129,"citation":10,"href":1130},{"id":1171,"heading":2845,"paragraphs":2846,"blocks":2850},"四合一气体检测仪使用哪些报警级别？",[2847,2848,2849],"四合一气体检测仪没有一套固定的内置报警级别。每种气体的报警设定值分别配置。在美国，可将设定值与下列参考值比较。[S5] [S9] [S18] [S19] 氧气和 %LEL 数值用于界定许可空间中的危险空气环境。H₂S 和 CO 数值是暴露限值，各自有对应的平均时间段，必须与所用报警模式相匹配。","关于氧气，OSHA 技术手册指出，检测仪报警通常设在同样的两个界限：低于 19.5% 为缺氧环境，高于 23.5% 为富氧环境。[S1] 可燃气体报警设在 10%LEL 时，正好位于许可空间的界限，因此设置更低的一级报警可在达到该界限之前发出警告。[S9] 对于 H₂S 和 CO，TWA 值对应 TWA 报警模式，最高限值和峰值对应瞬时高报警。将 TWA 数值用于瞬时报警，或反过来使用，都会按错误的时间基准比较读数。[S2]","Eranntex 出厂时不采用一组固定的报警点。BTYQ-MS104K-M 和 BTYQ-MS400-S 提供低、高、量程及 TWA\u002FSTEL 报警模式 [S3]，其默认模式和设定值按客户订货时指定的要求设置。[S21] 报价时应将这些要求与气体组合和测量量程一并列出。美国以外的数值取决于仪器使用地的管辖规定，其中许多与上述数值不同。最终设置由现场的管理方案决定。",[2851,2864,2957,2968],{"kind":1016,"content":2852},[2853,2855,2856,2857,2858,2859,2860,2861,2862],{"text":2854},"四合一气体检测仪没有一套固定的内置报警级别。每种气体的报警设定值分别配置。在美国，可将设定值与下列参考值比较。",{"text":1183,"href":1184,"citation":10},{"text":1127},{"text":1021,"href":1022,"citation":10},{"text":1127},{"text":1031,"href":1032,"citation":10},{"text":1127},{"text":1191,"href":1192,"citation":10},{"text":2863}," 氧气和 %LEL 数值用于界定许可空间中的危险空气环境。H₂S 和 CO 数值是暴露限值，各自有对应的平均时间段，必须与所用报警模式相匹配。",{"kind":1053,"caption":2865,"headers":2866,"rows":2875},"四合一气体检测仪报警设置的美国参考值",[2867,2869,2872],[2868],{"text":2738},[2870],{"text":2871},"美国数值",[2873],{"text":2874},"类型和来源",[2876,2888,2898,2909,2920,2929,2939,2948],{"cells":2877},[2878,2881,2884],[2879],{"text":2880},"氧气",[2882],{"text":2883},"低于 19.5% vol（缺氧）；高于 23.5% vol（富氧）",[2885,2887],{"text":2886},"OSHA 对危险空气环境的定义，29 CFR 1910.146 ",{"text":1021,"href":1022,"citation":10},{"cells":2889},[2890,2892,2895],[2891],{"text":1223},[2893],{"text":2894},"高于可燃下限的 10%",[2896,2897],{"text":2886},{"text":1021,"href":1022,"citation":10},{"cells":2899},[2900,2902,2905],[2901],{"text":1234},[2903],{"text":2904},"10 ppm 最高限值，10 分钟",[2906,2908],{"text":2907},"NIOSH REL（建议值） ",{"text":1031,"href":1032,"citation":10},{"cells":2910},[2911,2913,2916],[2912],{"text":1234},[2914],{"text":2915},"20 ppm 最高限值；如果没有其他可测量的暴露，每班可有一次 50 ppm 峰值，持续不超过 10 分钟",[2917,2919],{"text":2918},"OSHA PEL，通用工业（表 Z-2） ",{"text":1191,"href":1192,"citation":10},{"cells":2921},[2922,2924,2926],[2923],{"text":1234},[2925],{"text":1259},[2927,2928],{"text":1262},{"text":1031,"href":1032,"citation":10},{"cells":2930},[2931,2933,2936],[2932],{"text":1268},[2934],{"text":2935},"35 ppm TWA；200 ppm 最高限值",[2937,2938],{"text":2907},{"text":1183,"href":1184,"citation":10},{"cells":2940},[2941,2943,2945],[2942],{"text":1268},[2944],{"text":1281},[2946,2947],{"text":1284},{"text":1183,"href":1184,"citation":10},{"cells":2949},[2950,2952,2954],[2951],{"text":1268},[2953],{"text":1292},[2955,2956],{"text":1262},{"text":1183,"href":1184,"citation":10},{"kind":1016,"content":2958},[2959,2961,2962,2964,2965,2967],{"text":2960},"关于氧气，OSHA 技术手册指出，检测仪报警通常设在同样的两个界限：低于 19.5% 为缺氧环境，高于 23.5% 为富氧环境。",{"text":1048,"href":1049,"citation":10},{"text":2963}," 可燃气体报警设在 10%LEL 时，正好位于许可空间的界限，因此设置更低的一级报警可在达到该界限之前发出警告。",{"text":1021,"href":1022,"citation":10},{"text":2966}," 对于 H₂S 和 CO，TWA 值对应 TWA 报警模式，最高限值和峰值对应瞬时高报警。将 TWA 数值用于瞬时报警，或反过来使用，都会按错误的时间基准比较读数。",{"text":1129,"href":1130,"citation":10},{"kind":1016,"content":2969},[2970,2972,2973,2975,2976],{"text":2971},"Eranntex 出厂时不采用一组固定的报警点。BTYQ-MS104K-M 和 BTYQ-MS400-S 提供低、高、量程及 TWA\u002FSTEL 报警模式 ",{"text":1312,"href":1313,"citation":10},{"text":2974},"，其默认模式和设定值按客户订货时指定的要求设置。",{"text":1317,"href":1318,"citation":10},{"text":2977}," 报价时应将这些要求与气体组合和测量量程一并列出。美国以外的数值取决于仪器使用地的管辖规定，其中许多与上述数值不同。最终设置由现场的管理方案决定。",{"id":1322,"heading":2979,"paragraphs":2980,"blocks":2988},"测量量程和准确度如何影响 CO 读数？",[2981,2982,2983,2984,2985,2986,2987],"选择能够覆盖作业所需浓度的 CO 量程，再评估报警或暴露评估所用读数附近的准确度。较宽的量程可以覆盖更高浓度，但在低浓度下不一定有相同的绝对误差。BTYQ-MS104K-M 和 BTYQ-MS400-S 的型号资料列出了以下气体及量程选项。[S4]","当准确度表示为满量程（FS，即测量量程的上限）的百分比时，就能清楚看出这一区别。我们的规格表给出的典型准确度为 ±3%FS，也可选配更高准确度的传感器。[S3] 按这一指标，0–100 ppm 的绝对允差为 ±3 ppm，而 0–1000 ppm 的绝对允差为 ±30 ppm。[S3; calculation] 显示分辨率是显示值的最小变化步长；增加小数位数不会减小该允差。","与报警表中的 CO 参考值（NIOSH 35 ppm TWA 和 200 ppm 最高限值、OSHA 50 ppm TWA）[S5] 对照，在相同 %FS 指标下，较窄量程的计算误差较小，但无法覆盖浓度达到 200 ppm 的情况。因此，选择取决于所需覆盖范围和适用的误差规格。","我们的 CO 型式评价报告给出了另一种误差表述：0–1000 μmol\u002Fmol 配置的最大允许误差（MPE）为 ±5 μmol\u002Fmol 或 ±10%。[S6] [S7] 报告记录的测试点为 150、300 和 700 μmol\u002Fmol，并非 35 ppm 附近。这些报告为较宽量程在报告所述实验室条件下的表现提供证据，但不能证明其在所有更低浓度下的误差。","在报告所列 CO 测试点上，结果为参考气体的 −1.7% 至 +5.3%。[S6] [S7] 测试温度范围为 20–24 °C，而我们的典型工作范围为 −20 至 +55 °C 和 10–95 %RH。[S3] [S6] [S7] 如果采购规格依赖于其他温度下的低浓度 CO 读数，就需要该条件下的性能证据。","下面的计算器回答的是更具体的问题：如果所述 %FS 指标适用，列出的哪些量程满足选定的浓度和误差要求？当指标为 ±q%FS 时，量程须满足 Cmax ≤ FS ≤ 100 × E ÷ q。其中 Cmax 是所需的最高浓度，E 是允许的绝对误差，单位为 ppm。[S3; calculation]","例如，要求覆盖 200 ppm 且将绝对误差限制在 ±5 ppm 时，按 ±3%FS 计算没有符合条件的量程。[S3; calculation] 这一结果说明所述 %FS 规格不适用于该任务，并不排除另有文件支持的不同准确度规格。任何替代方案仍需提供作业所需浓度和条件下的证据。",[2989,2994,3063,3073,3084,3093,3154,3170,3175,3187],{"kind":1016,"content":2990},[2991,2993],{"text":2992},"选择能够覆盖作业所需浓度的 CO 量程，再评估报警或暴露评估所用读数附近的准确度。较宽的量程可以覆盖更高浓度，但在低浓度下不一定有相同的绝对误差。BTYQ-MS104K-M 和 BTYQ-MS400-S 的型号资料列出了以下气体及量程选项。",{"text":1338,"href":1339,"citation":10},{"kind":1053,"caption":2995,"headers":2996,"rows":3006,"source":3059},"BTYQ-MS104K-M 和 BTYQ-MS400-S 的部分气体及量程选项",[2997,3000,3003],[2998],{"text":2999},"测量项目",[3001],{"text":3002},"测量量程",[3004],{"text":3005},"显示分辨率",[3007,3016,3025,3033,3042,3050],{"cells":3008},[3009,3012,3014],[3010],{"text":3011},"氧气（O₂）",[3013],{"text":1360},[3015],{"text":1363},{"cells":3017},[3018,3021,3023],[3019],{"text":3020},"一氧化碳（CO）",[3022],{"text":1371},[3024],{"text":1374},{"cells":3026},[3027,3029,3031],[3028],{"text":3020},[3030],{"text":1381},[3032],{"text":1384},{"cells":3034},[3035,3038,3040],[3036],{"text":3037},"硫化氢（H₂S）",[3039],{"text":1392},[3041],{"text":1374},{"cells":3043},[3044,3046,3048],[3045],{"text":3037},[3047],{"text":1371},[3049],{"text":1374},{"cells":3051},[3052,3055,3057],[3053],{"text":3054},"可燃气体",[3056],{"text":1410},[3058],{"text":1413},[3060,3061,3062],{"text":2802},{"text":1338,"citation":10,"href":1339},{"text":1081},{"kind":1016,"content":3064},[3065,3067,3068,3070,3071],{"text":3066},"当准确度表示为满量程（FS，即测量量程的上限）的百分比时，就能清楚看出这一区别。我们的规格表给出的典型准确度为 ±3%FS，也可选配更高准确度的传感器。",{"text":1312,"href":1313,"citation":10},{"text":3069}," 按这一指标，0–100 ppm 的绝对允差为 ±3 ppm，而 0–1000 ppm 的绝对允差为 ±30 ppm。",{"text":1426,"href":1313,"citation":10},{"text":3072}," 显示分辨率是显示值的最小变化步长；增加小数位数不会减小该允差。",{"kind":1016,"content":3074},[3075,3077,3079,3081,3082],{"text":3076},"与",{"text":3078,"href":1435},"报警表",{"text":3080},"中的 CO 参考值（NIOSH 35 ppm TWA 和 200 ppm 最高限值、OSHA 50 ppm TWA）",{"text":1183,"href":1184,"citation":10},{"text":3083},"对照，在相同 %FS 指标下，较窄量程的计算误差较小，但无法覆盖浓度达到 200 ppm 的情况。因此，选择取决于所需覆盖范围和适用的误差规格。",{"kind":1016,"content":3085},[3086,3088,3089,3090,3091],{"text":3087},"我们的 CO 型式评价报告给出了另一种误差表述：0–1000 μmol\u002Fmol 配置的最大允许误差（MPE）为 ±5 μmol\u002Fmol 或 ±10%。",{"text":1446,"href":1447,"citation":10},{"text":1127},{"text":1450,"href":1451,"citation":10},{"text":3092}," 报告记录的测试点为 150、300 和 700 μmol\u002Fmol，并非 35 ppm 附近。这些报告为较宽量程在报告所述实验室条件下的表现提供证据，但不能证明其在所有更低浓度下的误差。",{"kind":1053,"caption":3094,"headers":3095,"rows":3108,"source":3145},"CO 准确度规格：计算允差与实验室证据",[3096,3099,3102,3105],[3097],{"text":3098},"误差表述",[3100],{"text":3101},"量程",[3103],{"text":3104},"35 ppm 附近有何依据？",[3106],{"text":3107},"条件与限制",[3109,3121,3132],{"cells":3110},[3111,3114,3116,3118],[3112],{"text":3113},"规格表，典型值 ±3%FS",[3115],{"text":1371},[3117],{"text":1479},[3119],{"text":3120},"典型值；未说明测试条件。无法测量浓度达到 200 ppm 最高限值的情况。",{"cells":3122},[3123,3125,3127,3129],[3124],{"text":3113},[3126],{"text":1381},[3128],{"text":1491},[3130],{"text":3131},"典型值；未说明测试条件。",{"cells":3133},[3134,3137,3139,3142],[3135],{"text":3136},"型式评价 MPE：±5 μmol\u002Fmol 或 ±10%",[3138],{"text":1502},[3140],{"text":3141},"未在 35 ppm 附近测试。报告规定为 ±5 μmol\u002Fmol 或 ±10%。",[3143],{"text":3144},"每种型号测试 3 台，测试点为 150、300 和 700 μmol\u002Fmol。BTYQ-MS104K-M：20–24 °C，35–55 %RH。BTYQ-MS400-S：21–23 °C，55 %RH。",[3146,3147,3148,3149,3150,3151,3152],{"text":2802},{"text":1312,"citation":10,"href":1313},{"text":1127},{"text":1446,"citation":10,"href":1447},{"text":1127},{"text":1450,"citation":10,"href":1451},{"text":3153},"。计算值采用正文所述的方法和假设。",{"kind":1016,"content":3155},[3156,3158,3159,3160,3161,3163,3164,3165,3166,3167,3168],{"text":3157},"在报告所列 CO 测试点上，结果为参考气体的 −1.7% 至 +5.3%。",{"text":1446,"href":1447,"citation":10},{"text":1127},{"text":1450,"href":1451,"citation":10},{"text":3162}," 测试温度范围为 20–24 °C，而我们的典型工作范围为 −20 至 +55 °C 和 10–95 %RH。",{"text":1312,"href":1313,"citation":10},{"text":1127},{"text":1446,"href":1447,"citation":10},{"text":1127},{"text":1450,"href":1451,"citation":10},{"text":3169}," 如果采购规格依赖于其他温度下的低浓度 CO 读数，就需要该条件下的性能证据。",{"kind":1016,"content":3171},[3172,3174],{"text":3173},"下面的计算器回答的是更具体的问题：如果所述 %FS 指标适用，列出的哪些量程满足选定的浓度和误差要求？当指标为 ±q%FS 时，量程须满足 Cmax ≤ FS ≤ 100 × E ÷ q。其中 Cmax 是所需的最高浓度，E 是允许的绝对误差，单位为 ppm。",{"text":1426,"href":1313,"citation":10},{"kind":1540,"title":3176,"percentFS":1542,"gases":3177,"note":3186},"比较量程、分辨率和误差",[3178,3182],{"key":1545,"label":1268,"spans":3179,"ranges":3180,"resolutions":3181,"exampleMaximum":1551,"exampleError":1552},[1547,1548],[1371,1381],[1374,1384],{"key":1554,"label":1234,"spans":3183,"ranges":3184,"resolutions":3185,"exampleMaximum":1559,"exampleError":1560},[1556,1547],[1392,1371],[1374,1374],"此筛选工具将选定的 %FS 指标应用于列出的量程。另有文件支持的不同准确度规格需要单独评估。",{"kind":1016,"content":3188},[3189,3191,3192],{"text":3190},"例如，要求覆盖 200 ppm 且将绝对误差限制在 ±5 ppm 时，按 ±3%FS 计算没有符合条件的量程。",{"text":1426,"href":1313,"citation":10},{"text":3193}," 这一结果说明所述 %FS 规格不适用于该任务，并不排除另有文件支持的不同准确度规格。任何替代方案仍需提供作业所需浓度和条件下的证据。",{"id":1570,"heading":3195,"paragraphs":3196,"blocks":3202},"较低的 %LEL 读数能排除有害溶剂暴露吗？",[3197,3198,3199,3200,3201],"较低的 %LEL 读数不能证明溶剂暴露处于可接受水平，因为可燃性风险与有毒暴露发生在不同浓度。对于正己烷，美国 NIOSH 列出的爆炸下限（LEL）为体积分数 1.1%，推荐暴露限值（REL）为 50 ppm TWA。[S8] 按该 LEL 计算，即使 1%LEL 也对应 110 ppm。[S8; calculation] 因此，可燃性刻度上看似较低的数值，也可能对应超过暴露参考值的浓度。","在 10%LEL 时，计算所得正己烷浓度达到 1,100 ppm，即 NIOSH 的立即危及生命或健康浓度（IDLH）值。[S8; calculation] 美国 OSHA 29 CFR 1910.146 也将适用的许可空间内超过燃烧下限 10% 的可燃大气定义为危险大气。[S9] 低于该可燃性界限并不能证明有毒暴露已得到控制。","还需要区分气体性质换算和仪器读数预测。我们的 %LEL 型式评价使用甲烷；BTYQ-MS400-S 测试配置使用催化式传感器，其最大允许误差（MPE）为 ±5%FS。[S10] [S11] 使用甲烷标定的传感器，需要提供该传感器对其他可燃气体的响应数据。[S1] 下方选择器改变的是计算中的 LEL 参考值，并不模拟该传感器响应。","换算使用已公布的甲烷、丙烷和正己烷 LEL 参考值。[S12] [S13] [S8] 因此，针对正己烷应用，询价时应分别说明可燃性要求和暴露要求。","我们的资料列出从 0–20 ppm 到 0–10,000 ppm 的 VOC 量程，两种型号都内置气体库。[S3] [S4] 仅凭这些特点不能证明正己烷检测性能：选型仍需要拟提供传感器的响应数据及所需 ppm 量程。在 BTYQ-MS104K-M 上，PID 测量和 %LEL 测量还需占用资料所载的同一个传感器位置。[S3] 当两项测量都需要时，这一组合限制会影响型号选择。",[3203,3213,3258,3268,3280,3290,3301,3340],{"kind":1016,"content":3204},[3205,3207,3208,3210,3211],{"text":3206},"较低的 %LEL 读数不能证明溶剂暴露处于可接受水平，因为可燃性风险与有毒暴露发生在不同浓度。对于正己烷，美国 NIOSH 列出的爆炸下限（LEL）为体积分数 1.1%，推荐暴露限值（REL）为 50 ppm TWA。",{"text":1584,"href":1585,"citation":10},{"text":3209}," 按该 LEL 计算，即使 1%LEL 也对应 110 ppm。",{"text":1589,"href":1585,"citation":10},{"text":3212}," 因此，可燃性刻度上看似较低的数值，也可能对应超过暴露参考值的浓度。",{"kind":1053,"caption":3214,"headers":3215,"rows":3225,"source":3254},"正己烷 10%LEL 与美国参考值的比较",[3216,3219,3222],[3217],{"text":3218},"数值",[3220],{"text":3221},"浓度",[3223],{"text":3224},"数值的含义",[3226,3236,3245],{"cells":3227},[3228,3231,3233],[3229],{"text":3230},"正己烷的 10%LEL",[3232],{"text":1612},[3234],{"text":3235},"根据气体性质换算的可燃性数值，并非检测仪读数",{"cells":3237},[3238,3240,3242],[3239],{"text":1620},[3241],{"text":1612},[3243],{"text":3244},"立即危及生命或健康",{"cells":3246},[3247,3249,3251],[3248],{"text":1630},[3250],{"text":1281},[3252],{"text":3253},"一个工作日内的推荐暴露限值",[3255,3256,3257],{"text":2802},{"text":1584,"citation":10,"href":1585},{"text":3153},{"kind":1016,"content":3259},[3260,3262,3263,3265,3266],{"text":3261},"在 10%LEL 时，计算所得正己烷浓度达到 1,100 ppm，即 NIOSH 的立即危及生命或健康浓度（IDLH）值。",{"text":1589,"href":1585,"citation":10},{"text":3264}," 美国 OSHA 29 CFR 1910.146 也将适用的许可空间内超过燃烧下限 10% 的可燃大气定义为危险大气。",{"text":1021,"href":1022,"citation":10},{"text":3267}," 低于该可燃性界限并不能证明有毒暴露已得到控制。",{"kind":1016,"content":3269},[3270,3272,3273,3274,3275,3277,3278],{"text":3271},"还需要区分气体性质换算和仪器读数预测。我们的 %LEL 型式评价使用甲烷；BTYQ-MS400-S 测试配置使用催化式传感器，其最大允许误差（MPE）为 ±5%FS。",{"text":1655,"href":1656,"citation":10},{"text":1127},{"text":1659,"href":1660,"citation":10},{"text":3276}," 使用甲烷标定的传感器，需要提供该传感器对其他可燃气体的响应数据。",{"text":1048,"href":1049,"citation":10},{"text":3279}," 下方选择器改变的是计算中的 LEL 参考值，并不模拟该传感器响应。",{"kind":1667,"title":3281,"gases":3282,"note":3289},"相同 %LEL，不同体积浓度",[3283,3285,3287],{"key":1671,"name":3284,"lelPercentVolume":1552},"甲烷",{"key":1674,"name":3286,"lelPercentVolume":1676},"丙烷",{"key":1678,"name":3288,"lelPercentVolume":1680},"正己烷","仅按气体性质换算，不能预测用其他气体标定的传感器响应，也不提供修正系数或设定报警值。",{"kind":1016,"content":3291},[3292,3294,3295,3296,3297,3298,3299],{"text":3293},"换算使用已公布的甲烷、丙烷和正己烷 LEL 参考值。",{"text":1687,"href":1688,"citation":10},{"text":1127},{"text":1691,"href":1692,"citation":10},{"text":1127},{"text":1584,"href":1585,"citation":10},{"text":3300}," 因此，针对正己烷应用，询价时应分别说明可燃性要求和暴露要求。",{"kind":1053,"caption":3302,"headers":3303,"rows":3313,"source":3336},"正己烷作业的两项独立要求",[3304,3307,3310],[3305],{"text":3306},"要求",[3308],{"text":3309},"询价时应说明",[3311],{"text":3312},"拟提供仪器所需的证据",[3314,3325],{"cells":3315},[3316,3319,3322],[3317],{"text":3318},"可燃性",[3320],{"text":3321},"正己烷、%LEL 刻度及标定气体。",[3323],{"text":3324},"该传感器对正己烷的响应数据；仅换算气体性质不够。",{"cells":3326},[3327,3330,3333],[3328],{"text":3329},"暴露",[3331],{"text":3332},"正己烷的 ppm 浓度、适用限值及其平均时间。",[3334],{"text":3335},"具有相应性能数据的 ppm 级测量方法；仅有通用的“VOC”标识不够。",[3337,3338,3339],{"text":2802},{"text":1048,"citation":10,"href":1049},{"text":1081},{"kind":1016,"content":3341},[3342,3344,3345,3346,3347,3349,3350],{"text":3343},"我们的资料列出从 0–20 ppm 到 0–10,000 ppm 的 VOC 量程，两种型号都内置气体库。",{"text":1312,"href":1313,"citation":10},{"text":1127},{"text":1338,"href":1339,"citation":10},{"text":3348}," 仅凭这些特点不能证明正己烷检测性能：选型仍需要拟提供传感器的响应数据及所需 ppm 量程。在 BTYQ-MS104K-M 上，PID 测量和 %LEL 测量还需占用资料所载的同一个传感器位置。",{"text":1312,"href":1313,"citation":10},{"text":3351}," 当两项测量都需要时，这一组合限制会影响型号选择。",{"id":1749,"heading":3353,"paragraphs":3354,"blocks":3359},"为什么氧气读数正常也不能排除 CO₂ 风险？",[3355,3356,3357,3358],"O₂ 传感器测量的是氧气，因此其读数不能说明 CO₂ 的浓度。如果不含氧气的 CO₂ 与初始 O₂ 含量为 20.9% vol 的空气均匀混合，随着空气被置换，氧气占比会下降。计算式为 O₂ = 20.9 ×（1 − CO₂ 占比）。[Calculation] 当 CO₂ 为 3% vol 时，算出的 O₂ 读数仍为 20.27% vol。","在 NIOSH 的 CO₂ IDLH 值 40,000 ppm 下，同样的计算得出 O₂ 为 20.06% vol。[S14; calculation] 该值高于 OSHA 29 CFR 1910.146 针对其适用的许可空间所规定的 19.5% vol 缺氧界限。[S9] 这个例子说明了检测盲区；均匀混合和 CO₂ 不含氧气是计算假设，并非对某次具体泄漏的预测。","存在 CO₂ 危害时，需要单独测量 CO₂。选择量程时，与 CO 一样需要考虑覆盖范围和误差：仪器需要读取哪些浓度，读数又需要达到什么准确度？我们的资料列出以下 CO₂ 选项。[S3] [S4]","0–5,000 ppm 选项只有在满量程时才能达到 NIOSH TWA 参考值，短时间参考值和 IDLH 参考值则超出其量程。[S4] [S14] 达到 40,000 ppm 的量程可以覆盖这些较高的参考浓度，但量程覆盖本身不能证明准确度。型号部分说明了为什么在 O₂\u002FCO\u002FH₂S\u002F%LEL 配置中增加 CO₂ 还取决于型号的传感器布置。",[3360,3367,3422,3432,3439,3482],{"kind":1016,"content":3361},[3362,3364,3365],{"text":3363},"O₂ 传感器测量的是氧气，因此其读数不能说明 CO₂ 的浓度。如果不含氧气的 CO₂ 与初始 O₂ 含量为 20.9% vol 的空气均匀混合，随着空气被置换，氧气占比会下降。计算式为 O₂ = 20.9 ×（1 − CO₂ 占比）。",{"text":1762,"citation":10},{"text":3366}," 当 CO₂ 为 3% vol 时，算出的 O₂ 读数仍为 20.27% vol。",{"kind":1053,"caption":3368,"headers":3369,"rows":3379,"source":3416},"理想置换：CO₂ 浓度与计算所得氧气读数",[3370,3373,3376],[3371],{"text":3372},"混合气体中的 CO₂",[3374],{"text":3375},"计算所得 O₂ 读数",[3377],{"text":3378},"该 CO₂ 浓度对应的美国参考值",[3380,3389,3398,3407],{"cells":3381},[3382,3384,3386],[3383],{"text":1782},[3385],{"text":1785},[3387],{"text":3388},"NIOSH REL 和 OSHA PEL：TWA 5,000 ppm",{"cells":3390},[3391,3393,3395],[3392],{"text":1793},[3394],{"text":1796},[3396],{"text":3397},"NIOSH 短时间 REL：30,000 ppm",{"cells":3399},[3400,3402,3404],[3401],{"text":1804},[3403],{"text":1807},[3405],{"text":3406},"NIOSH IDLH：40,000 ppm",{"cells":3408},[3409,3411,3413],[3410],{"text":1815},[3412],{"text":1818},[3414],{"text":3415},"超过 IDLH；O₂ 达到 OSHA 29 CFR 1910.146 中 19.5% vol 的界限",[3417,3418,3419,3420,3421],{"text":2802},{"text":1021,"citation":10,"href":1022},{"text":1127},{"text":1827,"citation":10,"href":1828},{"text":2760},{"kind":1016,"content":3423},[3424,3426,3427,3429,3430],{"text":3425},"在 NIOSH 的 CO₂ IDLH 值 40,000 ppm 下，同样的计算得出 O₂ 为 20.06% vol。",{"text":1835,"href":1828,"citation":10},{"text":3428}," 该值高于 OSHA 29 CFR 1910.146 针对其适用的许可空间所规定的 19.5% vol 缺氧界限。",{"text":1021,"href":1022,"citation":10},{"text":3431}," 这个例子说明了检测盲区；均匀混合和 CO₂ 不含氧气是计算假设，并非对某次具体泄漏的预测。",{"kind":1016,"content":3433},[3434,3436,3437,3438],{"text":3435},"存在 CO₂ 危害时，需要单独测量 CO₂。选择量程时，与 CO 一样需要考虑覆盖范围和误差：仪器需要读取哪些浓度，读数又需要达到什么准确度？我们的资料列出以下 CO₂ 选项。",{"text":1312,"href":1313,"citation":10},{"text":1127},{"text":1338,"href":1339,"citation":10},{"kind":1053,"caption":3440,"headers":3441,"rows":3448,"source":3476},"资料列出的 CO₂ 量程及其覆盖的美国参考值",[3442,3445],[3443],{"text":3444},"CO₂ 量程",[3446],{"text":3447},"量程内最高的美国参考值",[3449,3456,3463,3469],{"cells":3450},[3451,3453],[3452],{"text":1862},[3454],{"text":3455},"TWA 5,000 ppm，位于满量程；短时间 REL 和 IDLH 超出量程",{"cells":3457},[3458,3460],[3459],{"text":1870},[3461],{"text":3462},"短时间 REL 30,000 ppm 和 IDLH 40,000 ppm",{"cells":3464},[3465,3467],[3466],{"text":1878},[3468],{"text":1881},{"cells":3470},[3471,3473],[3472],{"text":1886},[3474],{"text":3475},"三个参考值均在量程内；请检查决策值附近适用的误差",[3477,3478,3479,3480,3481],{"text":2802},{"text":1338,"citation":10,"href":1339},{"text":1127},{"text":1827,"citation":10,"href":1828},{"text":2760},{"kind":1016,"content":3483},[3484,3486,3487,3488,3489,3491,3493,3495],{"text":3485},"0–5,000 ppm 选项只有在满量程时才能达到 NIOSH TWA 参考值，短时间参考值和 IDLH 参考值则超出其量程。",{"text":1338,"href":1339,"citation":10},{"text":1127},{"text":1827,"href":1828,"citation":10},{"text":3490}," 达到 40,000 ppm 的量程可以覆盖这些较高的参考浓度，但量程覆盖本身不能证明准确度。",{"text":3492},"",{"text":3494,"href":1909},"型号部分",{"text":3496},"说明了为什么在 O₂\u002FCO\u002FH₂S\u002F%LEL 配置中增加 CO₂ 还取决于型号的传感器布置。",{"id":1913,"heading":3498,"paragraphs":3499,"blocks":3501},"什么时候需要为四合一气体检测仪更换或增加检测气体？",[3500],"当作业中存在标准四种气体未涵盖的危害，例如 CO₂、溶剂蒸气、二氧化硫或氨气时，应更换或增加检测气体。此时，气体数量也是选型的考虑因素。根据资料，BTYQ-MS104K-M 和 BTYQ-MS400-S 标准配置可检测一至四种气体，并可扩展至五种或六种，但各自的传感器组合规则不同。[S3] 如果作业需要检测更多气体，根据资料，MS600-S 泵吸式多气体检测仪标准配置可检测一至七种气体，扩展配置可检测八种或九种。[S22] 特定组合是否适用于某一型号，以报价确认结果为准。",[3502],{"kind":1016,"content":3503},[3504,3506,3507,3509,3511,3513,3515,3517,3518,3520,3521,3523,3524],{"text":3505},"当作业中存在标准四种气体未涵盖的危害，例如 ",{"text":1923,"href":1079},{"text":3508},"、",{"text":3510,"href":1120},"溶剂蒸气",{"text":3512},"、二氧化硫或氨气时，应更换或增加检测气体。此时，气体数量也是选型的考虑因素。根据资料，BTYQ-MS104K-M 和 BTYQ-MS400-S 标准配置可检测一至四种气体，并可扩展至五种或六种，但各自的",{"text":3514,"href":1909},"传感器组合规则",{"text":3516},"不同。",{"text":1312,"href":1313,"citation":10},{"text":3519}," 如果作业需要检测更多气体，根据资料，",{"text":1938,"href":216},{"text":3522}," 泵吸式多气体检测仪标准配置可检测一至七种气体，扩展配置可检测八种或九种。",{"text":1942,"href":1943,"citation":10},{"text":3525}," 特定组合是否适用于某一型号，以报价确认结果为准。",{"id":1947,"heading":3527,"paragraphs":3528,"blocks":3538},"哪种型号和采样方式适合作业需求？",[3529,3530,3531,3532,3533,3534,3535,3536,3537],"在气体能够到达仪器的位置进行监测时，两种型号均支持扩散式采样。远程采样时，BTYQ-MS104K-M 使用外接泵；BTYQ-MS400-S 内置泵，可关闭泵进行扩散式采样。[S3] 应先确定采样位置以及需要同时测量的气体，再选择采样方式。","标准配件包括外接泵和过滤器。[S3] 型式评价报告中所列 MB20A 泵的额定流量为 500 mL\u002Fmin。[S11] 图片分别展示仪器本体和连接外接泵后的状态。","内置泵的额定流量为 0.5 至 1 L\u002Fmin，流量至少有 10 个档位。标准配件包括一根 0.2 m 鹅颈采样探头和一个过滤器。[S3] 两种型号还提供 0.6 m 不锈钢手柄或 0.9 m 伸缩手柄，每种均配有 1 m 软管。[S3]","规格表中，两种型号均可配置检测一至四种气体，并可扩展至五种或六种。[S3] 表中也列出了不同的传感器组合规则。因此，支持某一气体量程，并不足以证明所有所需气体都能同时测量。","对于 O₂\u002FCO\u002FH₂S\u002F%LEL 加 CO₂ 的需求，BTYQ-MS104K-M 不在资料所列组合范围内，因为 CO₂ 和 %LEL 使用同一个传感器位置。[S3] 这种五气体需求可评估 BTYQ-MS400-S；具体组合和 CO₂ 量程仍需在报价时确认。溶剂暴露要求在 %LEL 之外增加 PID 测量时，也适用相同的判断。","BTYQ-MS104K-M 超过 100 小时的运行时间适用于未使用催化式、红外或 PID 传感器的扩散运行。[S3] 因此，该数值不能证明 O₂\u002FCO\u002FH₂S\u002F%LEL 配置的运行时间。资料记载 BTYQ-MS400-S 在泵吸运行时超过 20 小时。[S3] 由于这两个数值对应的负载不同，报价需要说明所提议气体配置和采样模式下的运行时间。","泵的额定流量不能确定整套设备检测到目标气体需要多长时间。型式评价报告记录了受测配置和模式的实测响应时间，如下所示。[S6] [S7] [S10] T90 指读数达到最终值 90% 所需的时间。","这些结果在 20 至 24 °C 下测得，不包括额外连接的远程采样软管。[S6] [S7] [S10] 远程采样时，等待时间必须综合考虑目标气体、手柄、软管和过滤器。完整采样路径的响应结果可以回答这一问题；仅凭实验室响应数值则不能。","个人气体监测指南比较了佩戴式与远程监测、设备套件重量和运行时间，以及使用前检查。通过泵、探头和软管进行远程检测时，受限空间指南介绍了采样点、管路吹扫和响应。对于潮湿空气的固定在线采样，冷凝液和过滤器可能去除 H₂S 或氨气，可参阅污水气体采样指南。这些检查取决于此处选定的采样路径。",[3539,3546,3550,3560,3565,3570,3574,3582,3586,3591,3595,3602,3639,3646,3650,3660,3664,3675,3728,3739],{"kind":1016,"content":3540},[3541,3543,3544],{"text":3542},"在气体能够到达仪器的位置进行监测时，两种型号均支持扩散式采样。远程采样时，BTYQ-MS104K-M 使用外接泵；BTYQ-MS400-S 内置泵，可关闭泵进行扩散式采样。",{"text":1312,"href":1313,"citation":10},{"text":3545}," 应先确定采样位置以及需要同时测量的气体，再选择采样方式。",{"kind":1968,"level":1542,"content":3547},[3548],{"text":3549},"BTYQ-MS104K-M：扩散式采样及外接泵",{"kind":1016,"content":3551},[3552,3554,3555,3557,3558],{"text":3553},"标准配件包括外接泵和过滤器。",{"text":1312,"href":1313,"citation":10},{"text":3556}," 型式评价报告中所列 MB20A 泵的额定流量为 500 mL\u002Fmin。",{"text":1659,"href":1660,"citation":10},{"text":3559}," 图片分别展示仪器本体和连接外接泵后的状态。",{"kind":1983,"items":3561},[3562],{"url":1986,"alt":3563,"caption":3564,"width":1989,"height":1989},"BTYQ-MS104K-M 便携式气体检测仪正面","仪器本体",{"kind":1983,"items":3566},[3567],{"url":1993,"alt":3568,"caption":3569,"width":1996,"height":1997},"BTYQ-MS104K-M 连接外接泵，进气口上方装有过滤器","连接外接泵",{"kind":1968,"level":1542,"content":3571},[3572],{"text":3573},"BTYQ-MS400-S：内置泵与扩散模式",{"kind":1016,"content":3575},[3576,3578,3579,3581],{"text":3577},"内置泵的额定流量为 0.5 至 1 L\u002Fmin，流量至少有 10 个档位。标准配件包括一根 0.2 m 鹅颈采样探头和一个过滤器。",{"text":1312,"href":1313,"citation":10},{"text":3580}," 两种型号还提供 0.6 m 不锈钢手柄或 0.9 m 伸缩手柄，每种均配有 1 m 软管。",{"text":1312,"href":1313,"citation":10},{"kind":1983,"items":3583},[3584],{"url":2013,"alt":3585,"caption":3564,"width":1989,"height":1989},"BTYQ-MS400-S 便携式气体检测仪正面",{"kind":1983,"items":3587},[3588],{"url":2018,"alt":3589,"caption":3590,"width":2021,"height":2021},"BTYQ-MS400-S 连接鹅颈采样探头和进气过滤器","连接采样探头",{"kind":1968,"level":1542,"content":3592},[3593],{"text":3594},"气体组合可能先于采样方式决定型号",{"kind":1016,"content":3596},[3597,3599,3600],{"text":3598},"规格表中，两种型号均可配置检测一至四种气体，并可扩展至五种或六种。",{"text":1312,"href":1313,"citation":10},{"text":3601}," 表中也列出了不同的传感器组合规则。因此，支持某一气体量程，并不足以证明所有所需气体都能同时测量。",{"kind":1053,"caption":3603,"headers":3604,"rows":3614,"source":3635},"资料所列传感器组合规则",[3605,3608,3611],[3606],{"text":3607},"型号",[3609],{"text":3610},"资料所列组合",[3612],{"text":3613},"对 O₂ + CO + H₂S + %LEL 的影响",[3615,3625],{"cells":3616},[3617,3619,3622],[3618],{"text":2050},[3620],{"text":3621},"一个 EX、CO₂、PID 或红外传感器加三个电化学传感器；或四个电化学传感器；或 CO\u002FH₂S 加另外三种气体。",[3623],{"text":3624},"%LEL 传感器占用 EX、CO₂、PID 或红外传感器共用的单一位置。增加 CO₂ 或 PID 测量不在资料所列组合范围内。",{"cells":3626},[3627,3629,3632],[3628],{"text":2061},[3630],{"text":3631},"插入式数字传感器，自动识别，可任意组合。",[3633],{"text":3634},"CO₂ 等第五项测量属于扩展配置；我们会在报价时确认。",[3636,3637,3638],{"text":2802},{"text":1312,"citation":10,"href":1313},{"text":2760},{"kind":1016,"content":3640},[3641,3643,3644],{"text":3642},"对于 O₂\u002FCO\u002FH₂S\u002F%LEL 加 CO₂ 的需求，BTYQ-MS104K-M 不在资料所列组合范围内，因为 CO₂ 和 %LEL 使用同一个传感器位置。",{"text":1312,"href":1313,"citation":10},{"text":3645}," 这种五气体需求可评估 BTYQ-MS400-S；具体组合和 CO₂ 量程仍需在报价时确认。溶剂暴露要求在 %LEL 之外增加 PID 测量时，也适用相同的判断。",{"kind":1968,"level":1542,"content":3647},[3648],{"text":3649},"按实际使用的配置比较运行时间",{"kind":1016,"content":3651},[3652,3654,3655,3657,3658],{"text":3653},"BTYQ-MS104K-M 超过 100 小时的运行时间适用于未使用催化式、红外或 PID 传感器的扩散运行。",{"text":1312,"href":1313,"citation":10},{"text":3656}," 因此，该数值不能证明 O₂\u002FCO\u002FH₂S\u002F%LEL 配置的运行时间。资料记载 BTYQ-MS400-S 在泵吸运行时超过 20 小时。",{"text":1312,"href":1313,"citation":10},{"text":3659}," 由于这两个数值对应的负载不同，报价需要说明所提议气体配置和采样模式下的运行时间。",{"kind":1968,"level":1542,"content":3661},[3662],{"text":3663},"考虑完整采样路径",{"kind":1016,"content":3665},[3666,3668,3669,3670,3671,3672,3673],{"text":3667},"泵的额定流量不能确定整套设备检测到目标气体需要多长时间。型式评价报告记录了受测配置和模式的实测响应时间，如下所示。",{"text":1446,"href":1447,"citation":10},{"text":1127},{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":1655,"href":1656,"citation":10},{"text":3674}," T90 指读数达到最终值 90% 所需的时间。",{"kind":1053,"caption":3676,"headers":3677,"rows":3687,"source":3720},"型式评价中测得的响应时间",[3678,3681,3684],[3679],{"text":3680},"型号与气体",[3682],{"text":3683},"测试中的采样模式",[3685],{"text":3686},"实测响应时间",[3688,3699,3710],{"cells":3689},[3690,3693,3696],[3691],{"text":3692},"BTYQ-MS104K-M，CO 0 至 1000 μmol\u002Fmol",[3694],{"text":3695},"扩散式",[3697],{"text":3698},"三台仪器的平均值为 13 至 14 s",{"cells":3700},[3701,3704,3707],[3702],{"text":3703},"BTYQ-MS400-S，CO 0 至 1000 μmol\u002Fmol",[3705],{"text":3706},"泵吸式",[3708],{"text":3709},"三台仪器的平均值为 10 至 11 s",{"cells":3711},[3712,3715,3717],[3713],{"text":3714},"BTYQ-MS400-S，甲烷 0 至 100%LEL",[3716],{"text":3706},[3718],{"text":3719},"三台仪器的平均值为 8 至 10 s",[3721,3722,3723,3724,3725,3726,3727],{"text":2802},{"text":1446,"citation":10,"href":1447},{"text":1127},{"text":1450,"citation":10,"href":1451},{"text":1127},{"text":1655,"citation":10,"href":1656},{"text":2760},{"kind":1016,"content":3729},[3730,3732,3733,3734,3735,3736,3737],{"text":3731},"这些结果在 20 至 24 °C 下测得，不包括额外连接的远程采样软管。",{"text":1446,"href":1447,"citation":10},{"text":1127},{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":1655,"href":1656,"citation":10},{"text":3738}," 远程采样时，等待时间必须综合考虑目标气体、手柄、软管和过滤器。完整采样路径的响应结果可以回答这一问题；仅凭实验室响应数值则不能。",{"kind":1016,"content":3740},[3741,3742,3743,3745,3747,3749,3751],{"text":3492},{"text":2723,"href":48},{"text":3744},"比较了佩戴式与远程监测、设备套件重量和运行时间，以及使用前检查。通过泵、探头和软管进行远程检测时，",{"text":3746,"href":40},"受限空间指南",{"text":3748},"介绍了采样点、管路吹扫和响应。对于潮湿空气的固定在线采样，冷凝液和过滤器可能去除 H₂S 或氨气，可参阅",{"text":3750,"href":300},"污水气体采样指南",{"text":3752},"。这些检查取决于此处选定的采样路径。",{"id":2187,"heading":3754,"paragraphs":3755,"blocks":3758},"所供检测仪适用哪份防爆记录？",[3756,3757],"认证应针对实际供应的型号和版本核查，不能笼统地按整个品牌判断。下列中国 GB\u002FT 记录分别列明 BTYQ-MS104K-M 和 BTYQ-MS400-S。两者的标志均为 Ex ia IIC T4 Ga，后缀 X 表示存在特殊条件。[S15] [S16] 项目证书审查应包含这些条件。","这两份记录均不是 ATEX、IECEx 或美国认证。[S15] [S16] 我们还持有其他带不同标志的防爆记录，各自仅适用于其规定的范围。询价时应说明所需的认证体系，以便将所供型号和配置与相关记录对应。公司管理体系证书不能替代产品层面的证明文件。",[3759,3768,3806],{"kind":1016,"content":3760},[3761,3763,3764,3765,3766],{"text":3762},"认证应针对实际供应的型号和版本核查，不能笼统地按整个品牌判断。下列中国 GB\u002FT 记录分别列明 BTYQ-MS104K-M 和 BTYQ-MS400-S。两者的标志均为 Ex ia IIC T4 Ga，后缀 X 表示存在特殊条件。",{"text":2198,"href":2199,"citation":10},{"text":1127},{"text":2202,"href":2203,"citation":10},{"text":3767}," 项目证书审查应包含这些条件。",{"kind":1053,"caption":3769,"headers":3770,"rows":3779,"source":3800},"按型号核查证书：中国 GB\u002FT 记录",[3771,3773,3776],[3772],{"text":3607},[3774],{"text":3775},"证书及气体环境防爆标志",[3777],{"text":3778},"适用范围",[3780,3791],{"cells":3781},[3782,3784,3788],[3783],{"text":2050},[3785,3786],{"text":2224,"href":2225},{"text":3787},"：Ex ia IIC T4 Ga。",[3789],{"text":3790},"仅限所列版本；文件审查时应纳入 X 所表示的特殊条件。",{"cells":3792},[3793,3795,3798],[3794],{"text":2061},[3796,3797],{"text":2237,"href":2238},{"text":3787},[3799],{"text":3790},[3801,3802,3803,3804,3805],{"text":2802},{"text":2198,"citation":10,"href":2199},{"text":1127},{"text":2202,"citation":10,"href":2203},{"text":2760},{"kind":1016,"content":3807},[3808,3810,3811,3812,3813],{"text":3809},"这两份记录均不是 ATEX、IECEx 或美国认证。",{"text":2198,"href":2199,"citation":10},{"text":1127},{"text":2202,"href":2203,"citation":10},{"text":3814}," 我们还持有其他带不同标志的防爆记录，各自仅适用于其规定的范围。询价时应说明所需的认证体系，以便将所供型号和配置与相关记录对应。公司管理体系证书不能替代产品层面的证明文件。",{"id":2258,"heading":3816,"paragraphs":3817,"blocks":3823},"配置询价时应提供哪些信息？",[3818,3819,3820,3821,3822],"一份有用的询价应说明哪些气体需要同时测量、各自的量程和允许误差。还应说明检测仪是在佩戴或放置的位置进行扩散式采样，还是通过探头或软管进行泵吸式采样，因为这一选择可能决定型号。请补充所需运行时间和认证体系，以便我们提出配置并确定相应的证明文件。尚不清楚的要求可以暂时留空。","询价时也应说明标定气体。OSHA 指引建议每天使用前进行碰撞测试或标定检查。[S20] 个人气体监测指南中的使用前检查部分解释了每项检查能验证什么。","用一瓶混合气对四合一仪器进行碰撞测试或标定时，混合气中的浓度并非通用。OSHA 技术手册建议确认量程标定气适用于仪器的品牌和型号，因为多气体混合物中的某些气体可能影响同一仪器中的其他传感器。[S1] Eranntex 按客户指定的测试气体浓度进行标定，例如客户现有气瓶的浓度。如果客户未指定，我们按适用的中国国家标准（GB）规定浓度标定。[S21] 无论哪种情况，报价配置中都会注明浓度。测试气体应采用可溯源至 NIST 的标准进行认证；H₂S 等活性气体只能在有限时间内保持稳定，因此气瓶的有效期很重要。[S20]","对于 %LEL 传感器，标定气体还决定量程刻度。可燃气体读数表示标定所用气体爆炸下限（LEL）的百分比。如果目标气体不同，OSHA 手册建议尽可能使用目标气体标定，或使用制造商的修正数据。[S1] 我们对 BTYQ-MS104K-M 和 BTYQ-MS400-S 的 %LEL 型式评价使用的是甲烷。[S10] [S11] 我们按客户需要的参考气体标定 %LEL 传感器，例如甲烷或戊烷，因此请在询价时注明该气体。[S21]","将工作表内容复制到配置询价单，或使用气体检测仪报价清单补充其余订购信息。BTYQ-MS104K-M 产品页面和 BTYQ-MS400-S 产品页面列出了型号规格，可与所提议的组合一并核查。",[3824,3831,3842,3853,3866,3879],{"kind":1016,"content":3825},[3826,3828,3829],{"text":3827},"一份有用的询价应说明哪些气体需要同时测量、各自的量程和允许误差。还应说明检测仪是在佩戴或放置的位置进行扩散式采样，还是通过探头或软管进行泵吸式采样，因为这一选择可能决定",{"text":3607,"href":1909},{"text":3830},"。请补充所需运行时间和认证体系，以便我们提出配置并确定相应的证明文件。尚不清楚的要求可以暂时留空。",{"kind":1016,"content":3832},[3833,3835,3837,3838,3839,3840],{"text":3834,"strong":10},"询价时也应说明标定气体。",{"text":3836}," OSHA 指引建议每天使用前进行碰撞测试或标定检查。",{"text":2282,"href":2283,"citation":10},{"text":1127},{"text":2723,"href":48},{"text":3841},"中的使用前检查部分解释了每项检查能验证什么。",{"kind":1016,"content":3843},[3844,3846,3847,3849,3850,3852],{"text":3845},"用一瓶混合气对四合一仪器进行碰撞测试或标定时，混合气中的浓度并非通用。OSHA 技术手册建议确认量程标定气适用于仪器的品牌和型号，因为多气体混合物中的某些气体可能影响同一仪器中的其他传感器。",{"text":1048,"href":1049,"citation":10},{"text":3848}," Eranntex 按客户指定的测试气体浓度进行标定，例如客户现有气瓶的浓度。如果客户未指定，我们按适用的中国国家标准（GB）规定浓度标定。",{"text":1317,"href":1318,"citation":10},{"text":3851}," 无论哪种情况，报价配置中都会注明浓度。测试气体应采用可溯源至 NIST 的标准进行认证；H₂S 等活性气体只能在有限时间内保持稳定，因此气瓶的有效期很重要。",{"text":2282,"href":2283,"citation":10},{"kind":1016,"content":3854},[3855,3857,3858,3860,3861,3862,3863,3865],{"text":3856},"对于 %LEL 传感器，标定气体还决定量程刻度。可燃气体读数表示标定所用气体爆炸下限（LEL）的百分比。如果目标气体不同，OSHA 手册建议尽可能使用目标气体标定，或使用制造商的修正数据。",{"text":1048,"href":1049,"citation":10},{"text":3859}," 我们对 BTYQ-MS104K-M 和 BTYQ-MS400-S 的 %LEL 型式评价使用的是甲烷。",{"text":1655,"href":1656,"citation":10},{"text":1127},{"text":1659,"href":1660,"citation":10},{"text":3864}," 我们按客户需要的参考气体标定 %LEL 传感器，例如甲烷或戊烷，因此请在询价时注明该气体。",{"text":1317,"href":1318,"citation":10},{"kind":2314,"title":3867,"fields":3868,"contextFields":3874,"rowCount":2326,"note":3878},"准备配置询价",[3869,3870,3871,3872,3873],"所需气体","量程及单位","允许误差 \u002F 时间基准","需要同时测量的气体","仍需提供的证明资料",[3875,3876,3877],"采样任务、采样管和过滤器","运行条件和所需运行时间","认证体系和配置范围","填写后，内容会保留在本页面。准备好后请将结果复制到询价单；此处不会提交询价。",{"kind":1016,"content":3880},[3881,3883,3885,3887,3889,3891,3893,3895,3897],{"text":3882},"将工作表内容复制到",{"text":3884,"href":308},"配置询价单",{"text":3886},"，或使用",{"text":3888,"href":274},"气体检测仪报价清单",{"text":3890},"补充其余订购信息。",{"text":3892,"href":200},"BTYQ-MS104K-M 产品页面",{"text":3894},"和",{"text":3896,"href":212},"BTYQ-MS400-S 产品页面",{"text":3898},"列出了型号规格，可与所提议的组合一并核查。",{"id":2349,"heading":3900,"paragraphs":3901,"blocks":3903},"参考资料",[3902],"正文方括号中的编号链接至以下资料。四份型式评价报告可通过下方链接下载中文 PDF。其他逸云天记录可按需索取；公开参考资料链接至发布机构。",[3904,3907],{"kind":1016,"content":3905},[3906],{"text":3902},{"kind":1053,"caption":3908,"headers":3909,"rows":3919},"本指南引用的资料",[3910,3913,3916],[3911],{"text":3912},"编号",[3914],{"text":3915},"来源",[3917],{"text":3918},"支持的论述",[3920,3929,3938,3954,3964,3973,3983,3993,4002,4011,4021,4031,4040,4049,4058,4068,4078,4087,4096,4105,4114,4124],{"id":2371,"cells":3921},[3922,3924,3926],[3923],{"text":2375},[3925],{"text":2378,"href":2379},[3927],{"text":3928},"美国关于直读式仪器的指导：标定气体的 %LEL、适用于仪器品牌和型号的量程校准气体、正常空气中的氧气、常用氧气报警点及 PID 参考气体。",{"id":2384,"cells":3930},[3931,3933,3935],[3932],{"text":2388},[3934],{"text":2391,"href":2392},[3936],{"text":3937},"TWA、STEL 和最高限值的定义。",{"id":2397,"cells":3939},[3940,3942,3951],[3941],{"text":2401},[3943,3945,3946,3948,3949],{"text":3944},"逸云天产品规格表，2026-06-15 版。已发布的数值也可在 ",{"text":2050,"href":2406},{"text":3947}," 和 ",{"text":2061,"href":2409},{"text":3950}," 产品页面查看。",[3952],{"text":3953},"配置、典型准确度、采样、附件及续航，并包含所记录的条件。",{"id":2416,"cells":3955},[3956,3958,3961],[3957],{"text":2420},[3959],{"text":3960},"逸云天型号资料：气体量程附录（逸云天记录）。",[3962],{"text":3963},"单一气体及量程选项；不代表气体组合已获确认。",{"id":2428,"cells":3965},[3966,3968,3970],[3967],{"text":2432},[3969],{"text":2435,"href":2436},[3971],{"text":3972},"REL、最高限值和 OSHA PEL 及其平均时间。",{"id":2441,"cells":3974},[3975,3977,3980],[3976],{"text":2445},[3978],{"text":3979,"href":2449},"型式评价报告 HYQ202538502，Guangdong Institute of Metrology，2025-02-20（中文 PDF）。",[3981],{"text":3982},"BTYQ-MS104K-M，CO 0–1000 μmol\u002Fmol：3 台，20–24 °C，扩散式；实验室结果。",{"id":2454,"cells":3984},[3985,3987,3990],[3986],{"text":2458},[3988],{"text":3989,"href":2462},"型式评价报告 HYQ202538544，Guangdong Institute of Metrology，2026-01-22（中文 PDF）。",[3991],{"text":3992},"BTYQ-MS400-S，CO 0–1000 μmol\u002Fmol：3 台，21–23 °C，泵吸式；实验室结果。",{"id":2467,"cells":3994},[3995,3997,3999],[3996],{"text":2471},[3998],{"text":2474,"href":2475},[4000],{"text":4001},"REL、IDLH 和 LEL；不是传感器响应系数。",{"id":2480,"cells":4003},[4004,4006,4008],[4005],{"text":2484},[4007],{"text":2487,"href":2488},[4009],{"text":4010},"适用的美国许可空间中危险大气的定义及进入前检测顺序。",{"id":2493,"cells":4012},[4013,4015,4018],[4014],{"text":2497},[4016],{"text":4017,"href":2501},"型式评价报告 HYQ202538576，Guangdong Institute of Metrology，2026-01-26（中文 PDF）。",[4019],{"text":4020},"BTYQ-MS400-S，甲烷 0–100%LEL：催化式传感器，3 台，20–22 °C。",{"id":2506,"cells":4022},[4023,4025,4028],[4024],{"text":2510},[4026],{"text":4027,"href":2514},"型式评价报告 F24-164-JJ（中文 PDF）。",[4029],{"text":4030},"BTYQ-MS104K-M，甲烷 0–100%LEL；列出额定流量为 500 mL\u002Fmin 的 MB20A 外置泵。",{"id":2519,"cells":4032},[4033,4035,4037],[4034],{"text":2523},[4036],{"text":2526,"href":2527},[4038],{"text":4039},"甲烷 LEL 为体积分数 5%，仅用于换算。",{"id":2532,"cells":4041},[4042,4044,4046],[4043],{"text":2536},[4045],{"text":2539,"href":2540},[4047],{"text":4048},"丙烷 LEL 为体积分数 2.1%，仅用于换算。",{"id":2545,"cells":4050},[4051,4053,4055],[4052],{"text":2549},[4054],{"text":2552,"href":2553},[4056],{"text":4057},"REL、短期 REL、OSHA PEL 和 IDLH。",{"id":2558,"cells":4059},[4060,4062,4065],[4061],{"text":2562},[4063],{"text":4064,"href":2225},"证书 CCRI 24.2941X（PDF）",[4066],{"text":4067},"BTYQ-MS104K-M 的中国 GB\u002FT 防爆证书；仅涉及所标明的版本和 X 条件。",{"id":2570,"cells":4069},[4070,4072,4075],[4071],{"text":2574},[4073],{"text":4074,"href":2238},"证书 CCRI 25.2157X（PDF）",[4076],{"text":4077},"BTYQ-MS400-S 的中国 GB\u002FT 防爆证书；仅涉及所标明的版本和 X 条件。",{"id":2582,"cells":4079},[4080,4082,4084],[4081],{"text":2586},[4083],{"text":2589,"href":2590},[4085],{"text":4086},"先检测氧气、再检测可燃气体的原因。",{"id":2595,"cells":4088},[4089,4091,4093],[4090],{"text":2599},[4092],{"text":2602,"href":2603},[4094],{"text":4095},"REL 最高限值 10 ppm（10 分钟），IDLH 100 ppm；不能依靠气味判断。",{"id":2608,"cells":4097},[4098,4100,4102],[4099],{"text":2612},[4101],{"text":2615,"href":2616},[4103],{"text":4104},"H₂S 最高限值 20 ppm；峰值 50 ppm，最长 10 分钟。",{"id":2621,"cells":4106},[4107,4109,4111],[4108],{"text":2625},[4110],{"text":2628,"href":2629},[4112],{"text":4113},"每个使用日使用前进行碰撞测试或校准检查；使用经过认证且可溯源的测试气体。属于建议性指导，不是法规。",{"id":2634,"cells":4115},[4116,4118,4121],[4117],{"text":2638},[4119],{"text":4120},"逸云天标定和报警配置实践（逸云天记录）。",[4122],{"text":4123},"报警点按客户指定数值设置；测试气体浓度按客户要求或中国 GB 标准设定；%LEL 参考气体按客户需求确定。",{"id":2646,"cells":4125},[4126,4128,4135],[4127],{"text":2650},[4129,4131,4133],{"text":4130},"逸云天产品规格表，BTYQ-MS600-S。已发布的数值也可在",{"text":4132,"href":2656}," MS600-S 产品页面",{"text":4134},"查看。",[4136],{"text":4137},"标准及扩展气体数量；泵吸采样。",[4139,4142,4145,4148,4151,4154],{"id":2663,"question":4140,"answer":4141},"四合一气体检测仪能检测 CO₂ 吗？","配置为检测 O₂、CO、H₂S 和 %LEL 的四合一气体检测仪不能测量 CO₂，氧气读数也不能代替 CO₂ 测量。如果不含氧的 CO₂ 均匀置换空气，当 CO₂ 达到 40,000 ppm（NIOSH 的 IDLH 值）时，氧气仍约为 20.06%，高于 19.5% 的报警边界。如果 CO₂ 是现场危害之一，仪器需要量程合适的 CO₂ 传感器，且型号必须允许该传感器与其他四个传感器同时配置。",{"id":2667,"question":4143,"answer":4144},"是否应该选择最宽的 CO 量程？","不应默认选择最宽量程。应选择能够覆盖作业所需最高浓度的 CO 量程，再比较需要采取行动的浓度下的准确度。按典型的 ±3%FS 指标计算，0–100 ppm 对应 ±3 ppm，0–1000 ppm 对应 ±30 ppm。我们的 0–1000 μmol\u002Fmol 型式评价报告另有最大允许误差规定，但测试点为 150、300 和 700 μmol\u002Fmol，因此不能据此证明 35 ppm 附近的准确度。",{"id":2671,"question":4146,"answer":4147},"10%LEL 报警能保护作业人员免受溶剂暴露吗？","不能。%LEL 报警只针对可燃性。对于正己烷，10%LEL 对应 1,100 ppm，这是 NIOSH 的 IDLH 值，也是 NIOSH 50 ppm TWA 参考值的 22 倍。该换算还假定传感器对正己烷的响应与对其标定气体的响应相同，而使用甲烷标定的传感器不能保证这一点。溶剂暴露需要单独进行 ppm 级测量，例如使用具有该溶剂响应数据的 PID。",{"id":2675,"question":4149,"answer":4150},"四合一气体检测仪使用什么报警值？","各气体的报警设定点根据现场适用限值分别配置。在美国，OSHA 将许可空间内体积分数低于 19.5% 或高于 23.5% 的氧气，以及超过其燃烧下限 10% 的可燃气体视为危险大气条件。H₂S 的 NIOSH 最高限值为 10 ppm（10 分钟），OSHA 最高限值为 20 ppm。CO 的 NIOSH TWA 值为 35 ppm、最高限值为 200 ppm，OSHA TWA 值为 50 ppm。TWA 值用于 TWA 报警模式，最高限值用于瞬时报警。其他国家公布的限值有所不同。逸云天按客户指定的数值设置每台仪器的默认报警点。",{"id":2678,"question":4152,"answer":4153},"四合一气体检测仪需要什么标定气体？","四个传感器各自都需要经过认证的测试气体，可以使用一瓶混合气，也可以使用单独的气瓶。浓度取决于仪器品牌、型号和配置的量程，因此通用混合气不一定适用。逸云天按客户指定的浓度进行标定；客户未指定时，按适用的中国国家标准（GB）标定。%LEL 刻度相对于其标定气体，例如甲烷或戊烷，因此订购时应说明参考气体。作为第五项测量增加的 CO₂ 传感器或 PID 需要对应的测试气体；PID 通常使用异丁烯标定。",{"id":2682,"question":4155,"answer":4156},"四合一气体检测仪在洁净空气中应显示什么读数？","正常空气中氧气约占 20.9%，因此在洁净的室外空气中，O₂ 读数应接近体积分数 20.9%。CO、H₂S 和 %LEL 应显示零，或处于仪器规定的零点允差范围内。如果洁净空气中的读数不符，使用前需要检查；碰撞测试或校准检查可确认传感器是否响应。洁净空气读数只是快速检查，不能证明准确度。",[],{"productIds":4159,"gasIds":4160,"industryIds":4161,"applicationIds":4162,"id":294,"slug":4163,"type":668,"status":559,"language":18,"revision":4164,"issueDate":4165,"author":671,"media":4166,"certificateIds":4175,"marketContent":4176,"sources":4268},[],[],[],[],"public-procurement-awards-qingdao-xinjiang","company-news-approved-20261019","2026-10-19",{"id":4167,"url":4168,"mimeType":675,"width":995,"height":4169,"alt":4170,"roles":4171,"localizedAlt":4173},"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.",[4172,998],"card",{"zh-CN":4174},"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。",[],[4177,4228],{"market":17,"locale":18,"publication":4178,"title":4179,"summary":4180,"seo":4181,"body":4184,"mediaCaption":4227},{"status":568,"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":4182,"description":4183},"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.",[4185,4189,4202,4214,4218],{"id":4186,"paragraphs":4187},"procurement-update",[4188],"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":4190,"heading":4191,"paragraphs":4192,"links":4195},"qingdao-award","Equipment procurement in Qingdao",[4193,4194],"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.",[4196],{"id":4197,"label":4198,"target":4199},"qingdao-official-notice","Read the official award notice on 国家公共资源交易平台",{"kind":4200,"sourceId":4201},"reference","news-ref-qingdao-award-20261017",{"id":4203,"heading":4204,"paragraphs":4205,"links":4208},"xinjiang-award","Environmental monitoring procurement in Xinjiang",[4206,4207],"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.",[4209],{"id":4210,"label":4211,"target":4212},"xinjiang-official-notice","Read the official award notice on 新疆公共资源交易网",{"kind":4200,"sourceId":4213},"news-ref-xinjiang-award-20261010",{"id":4215,"paragraphs":4216},"award-scope",[4217],"These notices record procurement awards and the listed instruments. They do not confirm delivery, installation or operating results.",{"id":4219,"paragraphs":4220,"links":4222},"project-contact",[4221],"To discuss gas detection requirements for a procurement project, contact Eranntex with your application requirements.",[4223],{"id":4224,"label":4225,"target":4226},"contact-eranntex","contact Eranntex",{"kind":707,"path":52},"Editorial cover with a BTYQ-MS600-S2 product photograph. This image does not show equipment delivered to either procurement project.",{"body":4229,"mediaCaption":4261,"market":323,"locale":324,"publication":4262,"seo":4263,"title":4266,"summary":4267},[4230,4233,4242,4251,4254],{"id":4186,"paragraphs":4231},[4232],"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":4190,"heading":4234,"paragraphs":4235,"links":4238},"青岛设备采购",[4236,4237],"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。",[4239],{"id":4197,"label":4240,"target":4241},"在国家公共资源交易平台查看官方中标公告",{"kind":4200,"sourceId":4201},{"id":4203,"heading":4243,"paragraphs":4244,"links":4247},"新疆环境监测采购",[4245,4246],"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。",[4248],{"id":4210,"label":4249,"target":4250},"在新疆公共资源交易网查看官方中标公告",{"kind":4200,"sourceId":4213},{"id":4215,"paragraphs":4252},[4253],"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":4219,"paragraphs":4255,"links":4257},[4256],"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。",[4258],{"id":4224,"label":4259,"target":4260},"联系逸云天",{"kind":707,"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":568,"indexable":10},{"title":4264,"description":4265},"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。","逸云天祝贺供应商在青岛、新疆政府采购项目中标","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":4270,"gasIds":4271,"industryIds":4272,"applicationIds":4273,"id":290,"slug":4274,"type":668,"status":559,"language":18,"revision":4164,"issueDate":4165,"author":671,"media":4275,"certificateIds":4283,"marketContent":4284,"sources":4324},[],[],[],[],"oman-customer-visit-refrigerated-vehicle-gas-detection",{"id":4276,"url":4277,"mimeType":847,"width":4278,"height":4279,"alt":4280,"localizedAlt":4281},"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":4282},"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。",[],[4285,4306],{"market":17,"locale":18,"publication":4286,"title":4287,"summary":4288,"seo":4289,"mediaCaption":4291,"body":4292},{"status":568,"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":4290,"description":4288},"Oman Customer Visit: Refrigerated Vehicle Gas Detection","Eranntex team members with visiting customers from Oman.",[4293,4298],{"id":4294,"paragraphs":4295},"oman-customer-visit",[4296,4297],"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":4299,"paragraphs":4300,"links":4302},"discuss-your-project",[4301],"To discuss gas detection and connectivity requirements for refrigerated vehicles, contact Eranntex with your project details.",[4303],{"id":4304,"label":4225,"target":4305},"oman-contact-eranntex",{"kind":707,"path":52},{"mediaCaption":4307,"body":4308,"market":323,"locale":324,"publication":4319,"seo":4320,"title":4323,"summary":4322},"逸云天团队成员与来访的阿曼客户合影。",[4309,4313],{"id":4294,"paragraphs":4310},[4311,4312],"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":4299,"paragraphs":4314,"links":4316},[4315],"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。",[4317],{"id":4304,"label":4259,"target":4318},{"kind":707,"path":52},{"status":568,"indexable":10},{"title":4321,"description":4322},"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。","逸云天接待阿曼客户，洽谈冷藏车气体检测",[],{"productIds":4326,"gasIds":4327,"industryIds":4328,"applicationIds":4329,"id":268,"slug":4330,"type":668,"status":559,"language":18,"revision":4164,"issueDate":4165,"author":671,"media":4331,"certificateIds":4339,"marketContent":4340,"sources":4378},[],[],[],[],"customer-training-custom-vehicle-exhaust-project",{"id":4332,"url":4333,"mimeType":899,"width":4334,"height":4335,"alt":4336,"localizedAlt":4337},"local-customer-visit-photo","\u002Fimages\u002Fresources\u002Fcustomer-visit-custom-vehicle-exhaust-project.png",1280,720,"Eranntex representatives and visitors seated around a dining table.",{"zh-CN":4338},"逸云天代表与来访客户围坐在餐桌旁。",[],[4341,4360],{"market":17,"locale":18,"publication":4342,"title":4343,"summary":4344,"seo":4345,"mediaCaption":4347,"body":4348},{"status":568,"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":4346,"description":4344},"Customer Training for a Custom Exhaust Gas Project","Eranntex representatives and visitors share a meal during the visit.",[4349,4354],{"id":4350,"paragraphs":4351},"customer-visit",[4352,4353],"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":4299,"paragraphs":4355,"links":4357},[4356],"To discuss a custom exhaust gas project for construction vehicles, contact Eranntex with your application requirements.",[4358],{"id":4224,"label":4225,"target":4359},{"kind":707,"path":52},{"mediaCaption":4361,"body":4362,"market":323,"locale":324,"publication":4373,"seo":4374,"title":4377,"summary":4376},"来访期间，逸云天代表与来访客户一起用餐。",[4363,4367],{"id":4350,"paragraphs":4364},[4365,4366],"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":4299,"paragraphs":4368,"links":4370},[4369],"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。",[4371],{"id":4224,"label":4259,"target":4372},{"kind":707,"path":52},{"status":568,"indexable":10},{"title":4375,"description":4376},"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。","逸云天接待客户开展定制车辆尾气项目培训",[],{"productIds":4380,"gasIds":4381,"industryIds":4382,"applicationIds":4383,"id":279,"slug":4384,"type":987,"status":559,"language":18,"revision":4385,"issueDate":4165,"author":990,"media":4386,"certificateIds":4393,"marketContent":4394,"sources":5186},[],[64],[],[],"h2s-monitor-peak-twa-records","1.0",{"id":4387,"url":4388,"alt":4389,"width":995,"height":996,"mimeType":675,"roles":4390,"localizedAlt":4391},"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.",[998],{"zh-CN":4392},"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。",[],[4395,4853],{"market":17,"locale":18,"publication":4396,"title":4397,"summary":4398,"body":4399,"faq":4496,"seo":4517,"recordReview":4520,"mediaCaption":4852,"mediaLayout":2688},{"status":568,"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.",[4400,4417,4443,4454,4473,4481,4489],{"id":4401,"heading":4402,"navLabel":4402,"paragraphs":4403,"links":4406},"start-with-the-files","Can a high peak and a low TWA both be correct?",[4404,4405],"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.",[4407,4412],{"id":4408,"label":4409,"target":4410},"start-with-the-files-us","OSHA: Hydrogen Sulfide — Standards",{"kind":4200,"sourceId":4411},"osha-hydrogen-sulfide-standards",{"id":4413,"label":4414,"target":4415},"start-with-the-files-gb","HSE EH40\u002F2005, Fourth Edition 2020",{"kind":4200,"sourceId":4416},"w03-ref-gb",{"id":4418,"heading":4419,"navLabel":4419,"paragraphs":4420,"links":4423},"what-to-check-next","What should I check first?",[4421,4422],"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.",[4424,4429,4434,4439],{"id":4425,"label":4426,"target":4427},"what-to-check-next-study","Comparison of 3 methods characterizing H2S exposure in water and wastewater management work",{"kind":4200,"sourceId":4428},"w03-ref-study",{"id":4430,"label":4431,"target":4432},"what-to-check-next-blackline","External manufacturer reference — Blackline Safety: G7c\u002FG7x TWA and STEL guidance",{"kind":4200,"sourceId":4433},"w03-ref-blackline",{"id":4435,"label":4436,"target":4437},"what-to-check-next-gasclip","External manufacturer reference — Gas Clip Technologies: MGC Simple Plus manual, v1.04",{"kind":4200,"sourceId":4438},"w03-ref-gasclip",{"id":4440,"label":4441,"target":4442},"what-to-check-next-context-0","Personal gas monitoring: placement and recording requirements",{"kind":707,"path":48},{"id":4444,"heading":4445,"navLabel":4445,"paragraphs":4446,"links":4450},"reported-twa","Could a restart or setting change explain the TWA?",[4447,4448,4449],"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.",[4451],{"id":4452,"label":4431,"target":4453},"reported-twa-blackline",{"kind":4200,"sourceId":4433},{"id":4455,"heading":4456,"navLabel":4456,"paragraphs":4457,"links":4462},"peak-without-a-curve","What if the peak is logged but readings are missing?",[4458,4459,4460,4461],"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.",[4463,4466,4469],{"id":4464,"label":4436,"target":4465},"peak-without-a-curve-gasclip",{"kind":4200,"sourceId":4438},{"id":4467,"label":4426,"target":4468},"peak-without-a-curve-study",{"kind":4200,"sourceId":4428},{"id":4470,"label":4471,"target":4472},"peak-without-a-curve-context-0","Water and wastewater monitoring: tasks and sampling locations",{"kind":707,"path":79},{"id":4474,"heading":4475,"navLabel":4475,"paragraphs":4476,"links":4480},"jurisdiction","Which H₂S exposure limit should I compare with?",[4477,4478,4479],"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":4482,"heading":4483,"navLabel":4483,"paragraphs":4484,"links":4488},"review-note","What should I send to technical support?",[4485,4486,4487],"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":4490,"heading":4491,"navLabel":4491,"paragraphs":4492,"links":4495},"worked-record","Optional: follow a fictional 20-minute example",[4493,4494],"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.",[],[4497,4501,4505,4509,4513],{"id":4498,"question":4499,"answer":4500},"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":4502,"question":4503,"answer":4504},"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":4506,"question":4507,"answer":4508},"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":4510,"question":4511,"answer":4512},"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":4514,"question":4515,"answer":4516},"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":4518,"description":4519},"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":4521,"measurements":4522,"event":4591,"summary":4596,"findings":4599,"jurisdictions":4621,"downloads":4682,"relatedLinks":4688,"practical":4692,"visualExample":4708,"logChecks":4732,"logReferences":4756,"manufacturerExample":4763,"workedExample":4788,"recordingChecklist":4809,"labels":4838},{"arithmetic":4401,"record":4490,"jurisdiction":4474,"review":4482,"related":4482,"mechanisms":4455,"nextChecks":4418},[4523,4529,4533,4536,4539,4544,4547,4551,4554,4558,4561,4564,4567,4570,4573,4576,4579,4582,4585,4588],{"id":4524,"time":4525,"end":4526,"mean":4527,"status":4528},"M01","09:00","09:01","0.000","valid",{"id":4530,"time":4526,"end":4531,"mean":4532,"status":4528},"M02","09:02","0.200",{"id":4534,"time":4531,"end":4535,"mean":4532,"status":4528},"M03","09:03",{"id":4537,"time":4535,"end":4538,"mean":4532,"status":4528},"M04","09:04",{"id":4540,"time":4538,"end":4541,"mean":4542,"status":4543},"M05","09:05",null,"missing",{"id":4545,"time":4541,"end":4546,"mean":4542,"status":4543},"M06","09:06",{"id":4548,"time":4546,"end":4549,"mean":4550,"status":4528},"M07","09:07","0.400",{"id":4552,"time":4549,"end":4553,"mean":4550,"status":4528},"M08","09:08",{"id":4555,"time":4553,"end":4556,"mean":4557,"status":4528},"M09","09:09","0.100",{"id":4559,"time":4556,"end":4560,"mean":4527,"status":4528},"M10","09:10",{"id":4562,"time":4560,"end":4563,"mean":4527,"status":4528},"M11","09:11",{"id":4565,"time":4563,"end":4566,"mean":4527,"status":4528},"M12","09:12",{"id":4568,"time":4566,"end":4569,"mean":4527,"status":4528},"M13","09:13",{"id":4571,"time":4569,"end":4572,"mean":4527,"status":4528},"M14","09:14",{"id":4574,"time":4572,"end":4575,"mean":4527,"status":4528},"M15","09:15",{"id":4577,"time":4575,"end":4578,"mean":4527,"status":4528},"M16","09:16",{"id":4580,"time":4578,"end":4581,"mean":4527,"status":4528},"M17","09:17",{"id":4583,"time":4581,"end":4584,"mean":4527,"status":4528},"M18","09:18",{"id":4586,"time":4584,"end":4587,"mean":4527,"status":4528},"M19","09:19",{"id":4589,"time":4587,"end":4590,"mean":4527,"status":4528},"M20","09:20",{"id":4592,"start":4593,"end":4594,"peak":4595,"duration":11},"E01","09:04:15","09:04:45","12.000",{"id":4597,"value":4598},"summary.json","0.030",[4600,4607,4614],{"id":4601,"title":4602,"known":4603,"unknown":4604,"request":4605,"rows":4606},"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.",[4592,4540,4545],{"id":4608,"title":4609,"known":4610,"unknown":4611,"request":4612,"rows":4613},"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.",[4524,4540,4545],{"id":4615,"title":4616,"known":4617,"unknown":4618,"request":4619,"rows":4620},"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.",[4597],[4622,4632,4642,4654,4666],{"id":4623,"name":4624,"basis":4625,"values":4626,"period":4627,"implication":4628,"references":4629},"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.",[4630],{"id":4411,"label":4409,"url":4631},"https:\u002F\u002Fwww.osha.gov\u002Fhydrogen-sulfide\u002Fstandards",{"id":4633,"name":4634,"basis":4635,"values":4636,"period":4637,"implication":4638,"references":4639},"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.",[4640],{"id":4416,"label":4414,"url":4641},"https:\u002F\u002Fwww.hse.gov.uk\u002Fpubns\u002Fpriced\u002Feh40.pdf",{"id":4643,"name":4644,"basis":4645,"values":4646,"period":4647,"implication":4648,"references":4649},"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.",[4650],{"id":4651,"label":4652,"url":4653},"w03-ref-sg","Singapore WSH (General Provisions) Regulations","https:\u002F\u002Fsso.agc.gov.sg\u002FSL\u002FWSHA2006-RG1?ProvIds=Sc1-&ViewType=Within",{"id":4655,"name":4656,"basis":4657,"values":4658,"period":4659,"implication":4660,"references":4661},"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.",[4662],{"id":4663,"label":4664,"url":4665},"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":4667,"name":4668,"basis":4669,"values":4670,"period":4671,"implication":4672,"references":4673},"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.",[4674,4678],{"id":4675,"label":4676,"url":4677},"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":4679,"label":4680,"url":4681},"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":4683,"packet":4684,"arithmetic":4685,"worksheet":4686,"diagram":4687},"\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",[4689],{"label":4690,"url":297,"description":4691},"Technical support for an existing instrument","Prepare a request with the actual model, firmware, event and available records.",{"firstAction":4693,"checks":4694,"requestTemplate":4707},"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.",[4695,4699,4703],{"title":4696,"action":4697,"outcome":4698},"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":4700,"action":4701,"outcome":4702},"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":4704,"action":4705,"outcome":4706},"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":4709,"intro":4710,"sourceFile":4711,"periodMinutes":4712,"maximumMinuteMeanPpm":4713,"periodMeanPpm":4714,"bars":4715,"formula":4728,"scaleNote":4729,"boundary":4730,"downloadLabel":4731},"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",480,12,0.025,[4716,4722],{"id":4717,"button":4718,"label":4719,"value":4720,"explanation":4721},"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":4723,"button":4724,"label":4725,"value":4726,"explanation":4727},"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)",[4733,4741,4748],{"id":4734,"mechanism":4735,"example":4736,"action":4737,"boundary":4738,"referenceIds":4739},"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.",[4740],"gasclip",{"id":4742,"mechanism":4743,"example":4744,"action":4745,"boundary":4746,"referenceIds":4747},"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.",[4740],{"id":4749,"mechanism":4750,"example":4751,"action":4752,"boundary":4753,"referenceIds":4754},"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.",[4755],"study",[4757,4760],{"id":4755,"label":4758,"url":4759},"Study: methods and equipment","https:\u002F\u002Fpmc.ncbi.nlm.nih.gov\u002Farticles\u002FPMC11306318\u002F",{"id":4740,"label":4761,"url":4762},"Manual, pp. 14–15","https:\u002F\u002Fwww.gascliptech.com\u002Fproducts\u002Fmgc-simple-plus\u002Fdownloads\u002FUM-MGC-S-P%20v1.04%20WEB.pdf",{"title":4764,"model":4765,"intro":4766,"rows":4767,"boundary":4785,"productLabel":4786,"productUrl":208,"rfqLabel":4787,"rfqUrl":308},"Eranntex example: specify the records you need","BTYQ-MS104K-S2","These recording details are settled for the BTYQ-MS104K-S2.",[4768,4770,4773,4776,4779,4782],{"capability":4769,"documented":2128},"Sampling method",{"capability":4771,"documented":4772},"Record capacity","More than 1,000,000 records as standard",{"capability":4774,"documented":4775},"When storage is full","Logging stops; older records are not overwritten. Records can be deleted on the instrument.",{"capability":4777,"documented":4778},"Storage interval","Configurable",{"capability":4780,"documented":4781},"Alarm records","Content is set for the instrument and can be customised",{"capability":4783,"documented":4784},"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":4789,"fileGuideIntro":4790,"fileGuide":4791,"details":4803,"calculationNote":4808},"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.",[4792,4795,4798,4801],{"file":4793,"purpose":4794},"metadata.json","Read first. Defines units and what each value means. Timestamps use Coordinated Universal Time (UTC).",{"file":4796,"purpose":4797},"measurements.csv","Contains twenty one-minute intervals labelled M01–M20. NR on this page means no measurement was supplied; it is not zero.",{"file":4799,"purpose":4800},"events.csv","Contains one alarm event, labelled E01, with its start, end, recorded peak and alarm-event duration.",{"file":4597,"purpose":4802},"Contains a reported TWA with intentionally missing calculation details. It is a separate summary, not a result calculated from the measurement CSV.",[4804,4805,4806,4807],"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.",[4810,4814,4818,4822,4826,4830,4834],{"topic":4811,"question":4812,"evidence":4813},"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":4815,"question":4816,"evidence":4817},"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":4819,"question":4820,"evidence":4821},"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":4823,"question":4824,"evidence":4825},"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":4827,"question":4828,"evidence":4829},"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":4831,"question":4832,"evidence":4833},"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":4835,"question":4836,"evidence":4837},"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":4839,"logDescription":4840,"plotDescription":4841,"measurementIntro":4842,"measurementDescription":4843,"measurementNote":4844,"measurementCaption":4845,"summaryNote":4846,"jurisdictionCaption":4847,"procurementTitle":4848,"arithmeticDownload":4849,"completeValuesDownload":4850,"manufacturerCaption":4851,"eventFile":4799},"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":4854,"faq":4929,"recordReview":4945,"mediaCaption":5180,"mediaLayout":2688,"market":323,"locale":324,"publication":5181,"seo":5182,"title":5183,"summary":5185},[4855,4867,4885,4894,4909,4916,4923],{"id":4401,"heading":4856,"navLabel":4856,"paragraphs":4857,"links":4860},"峰值高、TWA 低，两者可能都正确吗？",[4858,4859],"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。",[4861,4864],{"id":4408,"label":4862,"target":4863},"OSHA: Hydrogen Sulfide — Standards（中译：OSHA 硫化氢标准）",{"kind":4200,"sourceId":4411},{"id":4413,"label":4865,"target":4866},"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":4200,"sourceId":4416},{"id":4418,"heading":4868,"navLabel":4868,"paragraphs":4869,"links":4872},"首先应该核查什么？",[4870,4871],"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。",[4873,4876,4879,4882],{"id":4425,"label":4874,"target":4875},"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":4200,"sourceId":4428},{"id":4430,"label":4877,"target":4878},"外部制造商资料 — Blackline Safety：G7c\u002FG7x TWA 与 STEL 说明",{"kind":4200,"sourceId":4433},{"id":4435,"label":4880,"target":4881},"外部制造商资料 — Gas Clip Technologies：MGC Simple Plus 手册，v1.04",{"kind":4200,"sourceId":4438},{"id":4440,"label":4883,"target":4884},"个人气体监测：佩戴位置与记录要求",{"kind":707,"path":48},{"id":4444,"heading":4886,"navLabel":4886,"paragraphs":4887,"links":4891},"重启或设置变更会不会影响 TWA？",[4888,4889,4890],"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。",[4892],{"id":4452,"label":4877,"target":4893},{"kind":4200,"sourceId":4433},{"id":4455,"heading":4895,"navLabel":4895,"paragraphs":4896,"links":4901},"峰值有记录，但读数缺失怎么办？",[4897,4898,4899,4900],"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。",[4902,4904,4906],{"id":4464,"label":4880,"target":4903},{"kind":4200,"sourceId":4438},{"id":4467,"label":4874,"target":4905},{"kind":4200,"sourceId":4428},{"id":4470,"label":4907,"target":4908},"水与污水监测：作业任务与采样位置",{"kind":707,"path":79},{"id":4474,"heading":4910,"navLabel":4910,"paragraphs":4911,"links":4915},"应与哪项 H₂S 接触限值对照？",[4912,4913,4914],"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":4482,"heading":4917,"navLabel":4917,"paragraphs":4918,"links":4922},"应向技术支持提供哪些信息？",[4919,4920,4921],"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":4490,"heading":4924,"navLabel":4924,"paragraphs":4925,"links":4928},"可选：跟着一个虚构的 20 分钟示例走一遍",[4926,4927],"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。",[],[4930,4933,4936,4939,4942],{"id":4498,"question":4931,"answer":4932},"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":4502,"question":4934,"answer":4935},"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":4506,"question":4937,"answer":4938},"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":4510,"question":4940,"answer":4941},"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":4514,"question":4943,"answer":4944},"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":4946,"measurements":4947,"event":4968,"summary":4969,"findings":4970,"jurisdictions":4989,"downloads":5035,"relatedLinks":5036,"practical":5040,"visualExample":5056,"logChecks":5071,"logReferences":5090,"manufacturerExample":5095,"workedExample":5119,"recordingChecklist":5137,"labels":5166},{"arithmetic":4401,"record":4490,"jurisdiction":4474,"review":4482,"related":4482,"mechanisms":4455,"nextChecks":4418},[4948,4949,4950,4951,4952,4953,4954,4955,4956,4957,4958,4959,4960,4961,4962,4963,4964,4965,4966,4967],{"id":4524,"time":4525,"end":4526,"mean":4527,"status":4528},{"id":4530,"time":4526,"end":4531,"mean":4532,"status":4528},{"id":4534,"time":4531,"end":4535,"mean":4532,"status":4528},{"id":4537,"time":4535,"end":4538,"mean":4532,"status":4528},{"id":4540,"time":4538,"end":4541,"mean":4542,"status":4543},{"id":4545,"time":4541,"end":4546,"mean":4542,"status":4543},{"id":4548,"time":4546,"end":4549,"mean":4550,"status":4528},{"id":4552,"time":4549,"end":4553,"mean":4550,"status":4528},{"id":4555,"time":4553,"end":4556,"mean":4557,"status":4528},{"id":4559,"time":4556,"end":4560,"mean":4527,"status":4528},{"id":4562,"time":4560,"end":4563,"mean":4527,"status":4528},{"id":4565,"time":4563,"end":4566,"mean":4527,"status":4528},{"id":4568,"time":4566,"end":4569,"mean":4527,"status":4528},{"id":4571,"time":4569,"end":4572,"mean":4527,"status":4528},{"id":4574,"time":4572,"end":4575,"mean":4527,"status":4528},{"id":4577,"time":4575,"end":4578,"mean":4527,"status":4528},{"id":4580,"time":4578,"end":4581,"mean":4527,"status":4528},{"id":4583,"time":4581,"end":4584,"mean":4527,"status":4528},{"id":4586,"time":4584,"end":4587,"mean":4527,"status":4528},{"id":4589,"time":4587,"end":4590,"mean":4527,"status":4528},{"id":4592,"start":4593,"end":4594,"peak":4595,"duration":11},{"id":4597,"value":4598},[4971,4977,4983],{"id":4601,"title":4972,"known":4973,"unknown":4974,"request":4975,"rows":4976},"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。",[4592,4540,4545],{"id":4608,"title":4978,"known":4979,"unknown":4980,"request":4981,"rows":4982},"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。",[4524,4540,4545],{"id":4615,"title":4984,"known":4985,"unknown":4986,"request":4987,"rows":4988},"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。",[4597],[4990,4998,5006,5015,5024],{"id":4623,"name":4991,"basis":4992,"values":4993,"period":4994,"implication":4995,"references":4996},"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。",[4997],{"id":4411,"label":4862,"url":4631},{"id":4633,"name":4999,"basis":5000,"values":5001,"period":5002,"implication":5003,"references":5004},"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。",[5005],{"id":4416,"label":4865,"url":4641},{"id":4643,"name":5007,"basis":5008,"values":5009,"period":5010,"implication":5011,"references":5012},"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。",[5013],{"id":4651,"label":5014,"url":4653},"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":4655,"name":5016,"basis":5017,"values":5018,"period":5019,"implication":5020,"references":5021},"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。",[5022],{"id":4663,"label":5023,"url":4665},"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":4667,"name":5025,"basis":5026,"values":5027,"period":5028,"implication":5029,"references":5030},"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。",[5031,5033],{"id":4675,"label":5032,"url":4677},"Safe Work Australia：工作场所接触标准（2025 年 11 月修订）",{"id":4679,"label":5034,"url":4681},"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":4683,"packet":4684,"arithmetic":4685,"worksheet":4686,"diagram":4687},[5037],{"label":5038,"url":297,"description":5039},"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":5041,"checks":5042,"requestTemplate":5055},"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。",[5043,5047,5051],{"title":5044,"action":5045,"outcome":5046},"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":5048,"action":5049,"outcome":5050},"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":5052,"action":5053,"outcome":5054},"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":5057,"intro":5058,"sourceFile":4711,"periodMinutes":4712,"maximumMinuteMeanPpm":4713,"periodMeanPpm":4714,"bars":5059,"formula":4728,"scaleNote":5068,"boundary":5069,"downloadLabel":5070},"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。",[5060,5064],{"id":4717,"button":5061,"label":5062,"value":4720,"explanation":5063},"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":4723,"button":5065,"label":5066,"value":4726,"explanation":5067},"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）",[5072,5078,5084],{"id":4734,"mechanism":5073,"example":5074,"action":5075,"boundary":5076,"referenceIds":5077},"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。",[4740],{"id":4742,"mechanism":5079,"example":5080,"action":5081,"boundary":5082,"referenceIds":5083},"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。",[4740],{"id":4749,"mechanism":5085,"example":5086,"action":5087,"boundary":5088,"referenceIds":5089},"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。",[4755],[5091,5093],{"id":4755,"label":5092,"url":4759},"研究：方法与设备",{"id":4740,"label":5094,"url":4762},"手册，第 14–15 页",{"title":5096,"model":4765,"intro":5097,"rows":5098,"boundary":5116,"productLabel":5117,"productUrl":208,"rfqLabel":5118,"rfqUrl":308},"逸云天示例：明确您需要的记录","BTYQ-MS104K-S2 的以下记录细节已经确定。",[5099,5101,5104,5107,5110,5113],{"capability":5100,"documented":3695},"采样方式",{"capability":5102,"documented":5103},"记录容量","标配超过 1,000,000 条记录",{"capability":5105,"documented":5106},"存储写满时","停止记录；不覆盖较早的记录。可在仪器上删除记录。",{"capability":5108,"documented":5109},"存储间隔","可设置",{"capability":5111,"documented":5112},"报警记录","内容按仪器设定，可定制",{"capability":5114,"documented":5115},"数据导出","可在仪器上查看、删除和导出记录，通过 USB-C 进行数据连接。导出格式按项目要求设定。","有三点取决于您订购的仪器、固件和配置：重启后 TWA 如何变化、默认存储间隔，以及报警事件是否与测量数据分开存储。我们的销售工程师可以确认这些内容。询价时请写明您的复核所需的记录间隔、报警值和文件格式。","查看 MS104K-S2 规格和配置选项","在项目询价中写明记录要求",{"downloadLabel":5120,"fileGuideIntro":5121,"fileGuide":5122,"details":5131,"calculationNote":5136},"下载示例数据包（ZIP）","先看这四个案例文件。ZIP 中还包括一份工作表、辅助说明，以及单独的 8 小时算术示例。",[5123,5125,5127,5129],{"file":4793,"purpose":5124},"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":4796,"purpose":5126},"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":4799,"purpose":5128},"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":4597,"purpose":5130},"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。",[5132,5133,5134,5135],"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。",[5138,5142,5146,5150,5154,5158,5162],{"topic":5139,"question":5140,"evidence":5141},"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 上，报警记录的内容按仪器设定且可定制，因此请说明您的复核需要哪些数值。","已配置仪器的导出文件，附数值定义和单位。",{"topic":5143,"question":5144,"evidence":5145},"时间戳与覆盖范围","时间戳标记的是时段的开始还是结束？时区、时钟调整和记录中断如何记载？","示例时间戳、时钟设置，以及标明监测开始、停止和缺口的记录。",{"topic":5147,"question":5148,"evidence":5149},"记录间隔与状态标志","有哪些记录间隔可选？缺失、无效、预热、故障和超量程状态在导出文件中如何显示？","所建议配置支持的间隔设置，以及字段或状态代码说明。",{"topic":5151,"question":5152,"evidence":5153},"TWA 计算与重置","使用哪个平均时段和哪些读数？关机、重置或模式切换后，计算会怎样？","针对具体型号和固件的计算说明、配置设置，以及可获得的重置记录。",{"topic":5155,"question":5156,"evidence":5157},"下载范围","将导出哪些记录，采用什么格式？MS104K-S2 的导出格式按项目要求设定。","按约定格式导出的样例文件，附字段定义。",{"topic":5159,"question":5160,"evidence":5161},"存储与保留","在您的记录间隔下，存储能用多久，由谁清理？MS104K-S2 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English technical summary","A modular online system for continuous odor, selected gas and optional meteorological monitoring.",[],{"productIds":5721,"gasIds":5722,"industryIds":5723,"applicationIds":5724,"id":5725,"slug":5726,"type":5194,"status":559,"language":18,"revision":5727,"issueDate":5196,"media":5728,"download":5732,"certificateIds":5736,"marketContent":5737,"sources":5742},[145],[],[],[],"resource-mic-200-ir2-technical-summary-en","mic-200-ir2-technical-summary-en","TS-20261008-9b15087a",{"id":5729,"url":5730,"alt":5731,"width":5201,"height":5202,"mimeType":847},"media-resource-mic-200-ir2-technical-summary-en","\u002Fimages\u002Fresources\u002Ftechnical-summaries\u002Fmic-200-ir2-technical-summary-en.jpg","MIC-200-IR2 English technical summary cover",{"id":5733,"url":5734,"alt":5735,"mimeType":852},"file-resource-mic-200-ir2-technical-summary-en","\u002Fdocuments\u002Ftechnical-summaries\u002Fmic-200-ir2-technical-summary-en.pdf","MIC-200-IR2 English technical summary PDF",[],[5738],{"market":17,"locale":18,"publication":5739,"title":5740,"summary":5741},{"status":568,"indexable":569},"MIC-200-IR2 English technical summary","A dual-infrared flame detector for industrial fire detection with configurable sensitivity and alarm outputs.",[],{"productIds":5744,"gasIds":5745,"industryIds":5746,"applicationIds":5747,"id":5748,"slug":5749,"type":5194,"status":559,"language":18,"revision":5750,"issueDate":5196,"media":5751,"download":5755,"certificateIds":5759,"marketContent":5760,"sources":5765},[149],[],[],[],"resource-mic-200-ir3-technical-summary-en","mic-200-ir3-technical-summary-en","TS-20261008-9eb8453d",{"id":5752,"url":5753,"alt":5754,"width":5201,"height":5202,"mimeType":847},"media-resource-mic-200-ir3-technical-summary-en","\u002Fimages\u002Fresources\u002Ftechnical-summaries\u002Fmic-200-ir3-technical-summary-en.jpg","MIC-200-IR3 English technical summary cover",{"id":5756,"url":5757,"alt":5758,"mimeType":852},"file-resource-mic-200-ir3-technical-summary-en","\u002Fdocuments\u002Ftechnical-summaries\u002Fmic-200-ir3-technical-summary-en.pdf","MIC-200-IR3 English technical summary PDF",[],[5761],{"market":17,"locale":18,"publication":5762,"title":5763,"summary":5764},{"status":568,"indexable":569},"MIC-200-IR3 English technical summary","A triple-infrared flame detector designed to identify fire radiation while reducing interference-related alarms.",[],{"productIds":5767,"gasIds":5768,"industryIds":5769,"applicationIds":5770,"id":5771,"slug":5772,"type":5194,"status":559,"language":18,"revision":5773,"issueDate":5196,"media":5774,"download":5778,"certificateIds":5782,"marketContent":5783,"sources":5788},[153],[],[],[],"resource-mic-200-ir4-technical-summary-en","mic-200-ir4-technical-summary-en","TS-20261008-0324b947",{"id":5775,"url":5776,"alt":5777,"width":5201,"height":5202,"mimeType":847},"media-resource-mic-200-ir4-technical-summary-en","\u002Fimages\u002Fresources\u002Ftechnical-summaries\u002Fmic-200-ir4-technical-summary-en.jpg","MIC-200-IR4 English technical summary cover",{"id":5779,"url":5780,"alt":5781,"mimeType":852},"file-resource-mic-200-ir4-technical-summary-en","\u002Fdocuments\u002Ftechnical-summaries\u002Fmic-200-ir4-technical-summary-en.pdf","MIC-200-IR4 English technical summary PDF",[],[5784],{"market":17,"locale":18,"publication":5785,"title":5786,"summary":5787},{"status":568,"indexable":569},"MIC-200-IR4 English technical summary","A four-infrared flame detector for industrial applications with complex infrared interference.",[],{"productIds":5790,"gasIds":5791,"industryIds":5792,"applicationIds":5793,"id":5794,"slug":5795,"type":5194,"status":559,"language":18,"revision":5796,"issueDate":5196,"media":5797,"download":5801,"certificateIds":5805,"marketContent":5806,"sources":5811},[157],[],[],[],"resource-mic-200-uvir2-technical-summary-en","mic-200-uvir2-technical-summary-en","TS-20261008-740e027c",{"id":5798,"url":5799,"alt":5800,"width":5201,"height":5202,"mimeType":847},"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":5802,"url":5803,"alt":5804,"mimeType":852},"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",[],[5807],{"market":17,"locale":18,"publication":5808,"title":5809,"summary":5810},{"status":568,"indexable":569},"MIC-200-UVIR2 English technical summary","A combined dual-infrared and ultraviolet flame detector for fast industrial fire detection and interference rejection.",[],{"productIds":5813,"gasIds":5814,"industryIds":5815,"applicationIds":5816,"id":5817,"slug":5818,"type":5194,"status":559,"language":18,"revision":5819,"issueDate":5196,"media":5820,"download":5824,"certificateIds":5828,"marketContent":5829,"sources":5834},[161],[],[],[],"resource-mic-200-uvir3-technical-summary-en","mic-200-uvir3-technical-summary-en","TS-20261008-bf827cfe",{"id":5821,"url":5822,"alt":5823,"width":5201,"height":5202,"mimeType":847},"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":5825,"url":5826,"alt":5827,"mimeType":852},"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",[],[5830],{"market":17,"locale":18,"publication":5831,"title":5832,"summary":5833},{"status":568,"indexable":569},"MIC-200-UVIR3 English technical summary","A combined triple-infrared and ultraviolet flame detector for complex high-risk industrial environments.",[],{"productIds":5836,"gasIds":5837,"industryIds":5838,"applicationIds":5839,"id":5840,"slug":5841,"type":5194,"status":559,"language":18,"revision":5842,"issueDate":5196,"media":5843,"download":5847,"certificateIds":5851,"marketContent":5852,"sources":5857},[165],[],[],[],"resource-mic-200-uvir4-technical-summary-en","mic-200-uvir4-technical-summary-en","TS-20261008-af53a134",{"id":5844,"url":5845,"alt":5846,"width":5201,"height":5202,"mimeType":847},"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":5848,"url":5849,"alt":5850,"mimeType":852},"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",[],[5853],{"market":17,"locale":18,"publication":5854,"title":5855,"summary":5856},{"status":568,"indexable":569},"MIC-200-UVIR4 English technical summary","A combined four-infrared and ultraviolet flame detector for demanding industrial fire-detection applications.",[],{"productIds":5859,"gasIds":5860,"industryIds":5861,"applicationIds":5862,"id":5863,"slug":5864,"type":5194,"status":559,"language":18,"revision":5865,"issueDate":5196,"media":5866,"download":5870,"certificateIds":5874,"marketContent":5875,"sources":5880},[237],[],[],[],"resource-smart-cloud-monitoring-platform-technical-summary-en","smart-cloud-monitoring-platform-technical-summary-en","TS-20261008-bd26be38",{"id":5867,"url":5868,"alt":5869,"width":5201,"height":5202,"mimeType":847},"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":5871,"url":5872,"alt":5873,"mimeType":852},"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",[],[5876],{"market":17,"locale":18,"publication":5877,"title":5878,"summary":5879},{"status":568,"indexable":569},"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":5882,"gasIds":5883,"industryIds":5884,"applicationIds":5885,"id":5886,"slug":5887,"type":5194,"status":559,"language":18,"revision":5888,"issueDate":5196,"media":5889,"download":5893,"certificateIds":5897,"marketContent":5898,"sources":5903},[137],[],[],[],"resource-mic-1000-ex-technical-summary-en","mic-1000-ex-technical-summary-en","TS-20261008-361c9d99",{"id":5890,"url":5891,"alt":5892,"width":5201,"height":5202,"mimeType":847},"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":5894,"url":5895,"alt":5896,"mimeType":852},"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",[],[5899],{"market":17,"locale":18,"publication":5900,"title":5901,"summary":5902},{"status":568,"indexable":569},"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":5905,"gasIds":5906,"industryIds":5909,"applicationIds":5910,"id":301,"slug":5911,"type":987,"status":559,"language":18,"issueDate":5912,"author":990,"media":5913,"certificateIds":5920,"marketContent":5921,"sources":7285},[133,193,245],[5907,64,5908],"gas-ch4","gas-nh3",[80],[37],"wastewater-gas-monitoring-sample-handling","2026-09-05",{"id":5914,"url":5915,"alt":5916,"width":995,"height":996,"mimeType":675,"roles":5917,"localizedAlt":5918},"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.",[4172,998],{"zh-CN":5919},"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。",[],[5922,6626],{"market":17,"locale":18,"publication":5923,"title":5924,"summary":5925,"updatedOn":5926,"body":5927,"faq":6601,"seo":6622,"mediaCaption":6625,"mediaLayout":2688},{"status":568,"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",[5928,5963,6007,6080,6118,6200,6227,6333,6357,6416],{"id":5929,"heading":5930,"paragraphs":5931,"blocks":5933},"ww-short-answer","How should humid tank air be sampled for H₂S and ammonia?",[5932],"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.",[5934,5937],{"kind":1016,"content":5935},[5936],{"text":5932},{"kind":1150,"ordered":569,"items":5938},[5939,5946,5953,5956],[5940,5942,5945],{"text":5941},"Remove the water in a cooler with an automatic drain, or keep the line heated and dry the sample in a condenser. See ",{"text":5943,"href":5944},"how the water is removed","#ww-drying",{"text":1081},[5947,5949,5952],{"text":5948},"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":5950,"href":5951},"how to check the path","#ww-whole-path",{"text":1081},[5954],{"text":5955},"Apply calibration gas at the probe inlet, not only at the analyzer, to measure what the line removes.",[5957,5959,5962],{"text":5958},"Allow for the time the gas needs to travel the line, on top of the sensor's own response time. See ",{"text":5960,"href":5961},"line length and response time","#ww-line-response",{"text":1081},{"id":5964,"heading":5965,"paragraphs":5966,"blocks":5971},"ww-condensation","Why do H₂S and ammonia readings drop in a wet sample line?",[5967,5968,5969,5970],"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.",[5972,5981,5993,6000],{"kind":1016,"content":5973},[5974,5976,5977,5978,5979],{"text":5975},"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":1338,"href":1339,"citation":10},{"text":1127},{"text":1183,"href":1184,"citation":10},{"text":5980}," The reading then depends on what happens to the gas inside the line.",{"kind":1016,"content":5982},[5983,5985,5987,5989,5990,5992],{"text":5984},"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":5986,"href":192},"GTYQ-MIC-600",{"text":5988}," fixed detector is specified for 10–95 %RH, so humid air alone is within its range. ",{"text":1021,"href":1022,"citation":10},{"text":5991}," 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":1338,"href":1339,"citation":10},{"kind":1016,"content":5994},[5995,5997,5998],{"text":5996},"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":1048,"href":1049,"citation":10},{"text":5999}," 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":1016,"content":6001},[6002,6004,6006],{"text":6003},"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":6005,"href":79},"water and wastewater industry page",{"text":1081},{"id":6008,"heading":6009,"paragraphs":6010,"blocks":6013},"ww-drying","How is the water removed without losing the gas?",[6011,6012],"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.",[6014,6022,6030,6072],{"kind":1016,"content":6015},[6016,6018,6019,6021],{"text":6017},"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":1021,"href":1022,"citation":10},{"text":6020}," 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":1687,"href":1688,"citation":10},{"kind":1983,"items":6023},[6024],{"url":6025,"alt":6026,"caption":6027,"width":6028,"height":6029},"\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":1150,"ordered":569,"items":6031},[6032,6045,6064],[6033,6035,6037,6039,6041,6042,6044],{"text":6034,"strong":10},"Cooling stage with automatic drain.",{"text":6036}," For the warm, humid air above the anaerobic tank in Example 1, the ",{"text":6038,"href":244},"TH-2000-C",{"text":6040}," 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":1338,"href":1339,"citation":10},{"text":6043}," The TH-2000-C is documented for high-humidity, low-dust samples in this way. ",{"text":1584,"href":1585,"citation":10},[6046,6048,6050,6051,6053,6054,6056,6058,6060,6061,6063],{"text":6047,"strong":10},"Heated line and two-stage condenser.",{"text":6049}," 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":1687,"href":1688,"citation":10},{"text":6052}," The sample is then dried in a two-stage condenser that holds its dew point at 4–5 °C. ",{"text":1129,"href":1130,"citation":10},{"text":6055}," On the ",{"text":6057,"href":132},"DOAS-3000",{"text":6059}," analyzer, this arrangement exists to limit losses of water-soluble components. ",{"text":1312,"href":1313,"citation":10},{"text":6062}," Where an outdoor line can freeze, it is heat-traced for that reason as well. ",{"text":1584,"href":1585,"citation":10},[6065,6067,6069,6070,6071],{"text":6066,"strong":10},"Simple pretreatment.",{"text":6068}," 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":1584,"href":1585,"citation":10},{"text":1127},{"text":1021,"href":1022,"citation":10},{"kind":1016,"content":6073},[6074,6076,6078],{"text":6075},"Whichever stage is used, its filters have to pass the target gas. The ",{"text":6077,"href":5951},"whole-path gas check",{"text":6079}," shows whether they do.",{"id":6081,"heading":6082,"paragraphs":6083,"blocks":6087},"ww-whole-path","How do you know the sample path is not absorbing the gas?",[6084,6085,6086],"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.",[6088,6093,6103],{"kind":1016,"content":6089},[6090,6092],{"text":6091},"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":1687,"href":1688,"citation":10},{"kind":1016,"content":6094},[6095,6097,6098,6100,6101],{"text":6096},"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":1446,"href":1447,"citation":10},{"text":6099}," 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":1691,"href":1692,"citation":10},{"text":6102}," For any path that must deliver ammonia, test the assembled path with ammonia before relying on it.",{"kind":1016,"content":6104},[6105,6107,6108,6110,6111,6113,6116],{"text":6106},"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":1659,"href":1660,"citation":10},{"text":6109}," The differences between a bump test, a calibration check and a full calibration are explained in the ",{"text":1040,"href":48},{"text":6112},". The ",{"text":6114,"href":6115},"water and wastewater page","https:\u002F\u002Fwww.eranntex.com\u002Findustries\u002Fwater-and-wastewater\u002F#ww01-05",{"text":6117}," describes an HSE investigation in which a complete sampling arrangement responded far more slowly to a flammable vapor than the detector alone.",{"id":6119,"heading":6120,"paragraphs":6121,"blocks":6127},"ww-example-anaerobic","Example 1: alarms for H₂S, methane and three other gases above an anaerobic tank",[6122,6123,6124,6125,6126],"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.",[6128,6133,6143,6187,6192,6197],{"kind":1016,"content":6129},[6130,6132],{"text":6131},"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":1338,"href":1339,"citation":10},{"kind":1016,"content":6134},[6135,6137,6138,6140,6141],{"text":6136},"Eranntex supplied a ",{"text":6038,"href":244},{"text":6139}," sample-conditioning system with a ",{"text":5986,"href":192},{"text":6142}," five-gas detector, in an outdoor rainproof cabinet. The specified ranges were:",{"kind":1053,"caption":6144,"headers":6145,"rows":6151},"Specified ranges, anaerobic tank alarm system",[6146,6149],[6147],{"text":6148},"Gas",[6150],{"text":1462},[6152,6158,6166,6173,6179],{"cells":6153},[6154,6156],[6155],{"text":1234},[6157],{"text":1371},{"cells":6159},[6160,6163],[6161],{"text":6162},"CH₄",[6164],{"text":6165},"0–5 %Vol",{"cells":6167},[6168,6170],[6169],{"text":1268},[6171],{"text":6172},"0–1,000 ppm",{"cells":6174},[6175,6177],[6176],{"text":1923},[6178],{"text":1862},{"cells":6180},[6181,6184],[6182],{"text":6183},"O₂",[6185],{"text":6186},"0–30 %Vol",{"kind":1016,"content":6188},[6189,6191],{"text":6190},"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":1338,"href":1339,"citation":10},{"kind":1016,"content":6193},[6194,6196],{"text":6195},"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":1338,"href":1339,"citation":10},{"kind":1016,"content":6198},[6199],{"text":6126},{"id":6201,"heading":6202,"paragraphs":6203,"blocks":6208},"ww-example-storage","Example 2: ammonia and H₂S at 0.01 ppm to measure treatment performance",[6204,6205,6206,6207],"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]",[6209,6214,6219,6222],{"kind":1016,"content":6210},[6211,6213],{"text":6212},"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":1183,"href":1184,"citation":10},{"kind":1016,"content":6215},[6216,6218],{"text":6217},"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":1183,"href":1184,"citation":10},{"kind":1016,"content":6220},[6221],{"text":6206},{"kind":1016,"content":6223},[6224,6226],{"text":6225},"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":1446,"href":1447,"citation":10},{"id":6228,"heading":6229,"paragraphs":6230,"blocks":6232},"ww-conditions","Which conditions at the sampling point change the system?",[6231],"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]",[6233,6238],{"kind":1016,"content":6234},[6235,6237],{"text":6236},"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":1450,"href":1451,"citation":10},{"kind":1053,"caption":6239,"headers":6240,"rows":6247},"Sampling-point conditions, what they add to the path, and documented Eranntex options",[6241,6244],[6242],{"text":6243},"Condition at the sampling point",[6245],{"text":6246},"What it adds, and documented Eranntex options",[6248,6265,6284,6301,6316],{"cells":6249},[6250,6253],[6251],{"text":6252},"High sample temperature",[6254,6256,6258,6259,6260,6262,6264],{"text":6255,"strong":10},"Adds:",{"text":6257}," a cooling sampling handle or cooling stage. ",{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":6261,"strong":10},"Documented:",{"text":6263}," 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":1584,"href":1585,"citation":10},{"cells":6266},[6267,6270],[6268],{"text":6269},"Sample near saturation or carrying liquid",[6271,6272,6274,6275,6276,6277,6279,6280,6281,6282,6283],{"text":6255,"strong":10},{"text":6273}," moisture removal ahead of the detector. ",{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":6261,"strong":10},{"text":6278}," 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":1129,"href":1130,"citation":10},{"text":1127},{"text":1584,"href":1585,"citation":10},{"text":1127},{"text":1021,"href":1022,"citation":10},{"cells":6285},[6286,6289],[6287],{"text":6288},"Dust",[6290,6291,6293,6294,6295,6296,6298,6299,6300],{"text":6255,"strong":10},{"text":6292}," dust filtration so the path does not clog. ",{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":6261,"strong":10},{"text":6297}," 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":1584,"href":1585,"citation":10},{"text":1127},{"text":1021,"href":1022,"citation":10},{"cells":6302},[6303,6306],[6304],{"text":6305},"Positive pressure or suction",[6307,6308,6310,6311,6312,6313,6315],{"text":6255,"strong":10},{"text":6309}," a pressure-reducing valve and flowmeter for positive pressure, or a higher-capacity sample pump for suction. ",{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":6261,"strong":10},{"text":6314}," TH-2000-C is documented for sampling points under positive or negative pressure. ",{"text":1584,"href":1585,"citation":10},{"cells":6317},[6318,6321],[6319],{"text":6320},"Interfering, corrosive or acid gases in the background",[6322,6323,6325,6326,6327,6328,6330,6331,6332],{"text":6255,"strong":10},{"text":6324}," a sensing principle chosen for the gas mixture, such as high-accuracy infrared or a photoionization detector (PID). ",{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":6261,"strong":10},{"text":6329}," Example 2 used an ammonia sensor chosen to resist H₂S; the high-concentration ammonia inlet was specified with TDLAS. ",{"text":1183,"href":1184,"citation":10},{"text":1127},{"text":1446,"href":1447,"citation":10},{"id":6334,"heading":6335,"paragraphs":6336,"blocks":6340},"ww-line-response","How long does the gas take to reach the analyzer?",[6337,6338,6339],"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.",[6341,6346,6354],{"kind":1016,"content":6342},[6343,6345],{"text":6344},"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":1655,"href":1656,"citation":10},{"kind":1016,"content":6347},[6348,6350,6351,6353],{"text":6349},"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":1687,"href":1688,"citation":10},{"text":6352}," 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":1584,"href":1585,"citation":10},{"kind":1016,"content":6355},[6356],{"text":6339},{"id":6358,"heading":6359,"paragraphs":6360,"blocks":6363,"links":6399},"ww-enquiry","What should you send with an enquiry?",[6361,6362],"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.",[6364,6367,6391],{"kind":1016,"content":6365},[6366],{"text":6361},{"kind":1150,"ordered":569,"items":6368},[6369,6372,6375,6378,6381,6384,6388],[6370],{"text":6371},"The gases and ranges, and whether the measurement is for an alarm or for process or treatment-performance data.",[6373],{"text":6374},"The tank or duct, and whether the sampling point is under suction or pressure.",[6376],{"text":6377},"The sample temperature, its moisture, and the coldest place the line will pass.",[6379],{"text":6380},"Dust, grease, foam or liquid carry-over at the sampling point, and any other gases present.",[6382],{"text":6383},"The line length and route, and where the measured sample can be discharged.",[6385,6387],{"text":6386},"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":1584,"href":1585,"citation":10},[6389],{"text":6390},"The country, and any hazardous-area classification at the cabinet location.",{"kind":1016,"content":6392},[6393,6395,6397],{"text":6394},"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":6396,"href":274},"quotation checklist",{"text":6398}," lists general project details.",[6400,6408,6412],{"id":6401,"label":6402,"target":6403},"ww-rfq","Discuss a wastewater tank monitoring requirement",{"kind":707,"path":308,"query":6404},{"type":6405,"context":6406,"gasRequirements":6407,"source":300},"technical_enquiry","Wastewater tank sample path","Hydrogen sulfide (H2S), ammonia (NH3)",{"id":6409,"label":6410,"target":6411},"ww-industry","Review wastewater monitoring tasks",{"kind":707,"path":79},{"id":6413,"label":6414,"target":6415},"ww-area","Review fixed and area monitoring tasks",{"kind":707,"path":35},{"id":2349,"heading":2350,"paragraphs":6417,"blocks":6419},[6418],"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.",[6420,6423],{"kind":1016,"content":6421},[6422],{"text":6418},{"kind":1053,"caption":2358,"headers":6424,"rows":6431},[6425,6427,6429],[6426],{"text":2362},[6428],{"text":2365},[6430],{"text":2368},[6432,6456,6466,6477,6487,6497,6507,6517,6535,6548,6559,6571,6586],{"id":2371,"cells":6433},[6434,6436,6453],[6435],{"text":2375},[6437,6439,6442,6444,6447,6448,6451],{"text":6438},"R. Sander, ",{"text":6440,"href":6441},"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":6443},", Atmospheric Chemistry and Physics 23, 10901–12440 (2023); entries for ",{"text":6445,"href":6446},"ammonia","https:\u002F\u002Fwww.henrys-law.org\u002Fhenry\u002Fcasrn\u002F7664-41-7",{"text":2343},{"text":6449,"href":6450},"hydrogen sulfide","https:\u002F\u002Fwww.henrys-law.org\u002Fhenry\u002Fcasrn\u002F7783-06-4",{"text":6452},", retrieved 3 November 2026",[6454],{"text":6455},"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":2384,"cells":6457},[6458,6460,6463],[6459],{"text":2388},[6461],{"text":6462},"Eranntex DOAS-3000 product documentation: sample conditioning description",[6464],{"text":6465},"Heat-traced sample line and two-stage condenser at a 4–5 °C dew point.",{"id":2397,"cells":6467},[6468,6470,6474],[6469],{"text":2401},[6471],{"text":6472,"href":6473},"Eranntex DOAS-3000 product page","https:\u002F\u002Fwww.eranntex.com\u002Fproducts\u002Fdoas-3000\u002F",[6475],{"text":6476},"Heated transport and two-stage condensation to limit losses of water-soluble components.",{"id":2416,"cells":6478},[6479,6481,6484],[6480],{"text":2420},[6482],{"text":6483},"Eranntex project record: five-gas monitoring system above an anaerobic wastewater tank",[6485],{"text":6486},"Example 1 conditions, configuration, ranges and commissioning; extractive layout.",{"id":2428,"cells":6488},[6489,6491,6494],[6490],{"text":2432},[6492],{"text":6493},"Eranntex configuration record: ammonia and H₂S monitoring above a covered sewage storage tank",[6495],{"text":6496},"Example 2 conditions and configuration; extractive layout.",{"id":2441,"cells":6498},[6499,6501,6504],[6500],{"text":2445},[6502],{"text":6503},"Eranntex project record: ammonia monitoring at the inlet and outlet of a treatment unit, including the pre-shipment gas test",[6505],{"text":6506},"Inlet and outlet specification; filter adsorption found in the pre-shipment test.",{"id":2454,"cells":6508},[6509,6511,6514],[6510],{"text":2458},[6512],{"text":6513},"Eranntex Technical Team note on sampling from pipes and closed spaces",[6515],{"text":6516},"Conditions that add components to the sample path.",{"id":2467,"cells":6518},[6519,6521,6532],[6520],{"text":2471},[6522,6524,6527,6529],{"text":6523},"Eranntex product specification table, online monitoring systems; ",{"text":6525,"href":6526},"TH-2000-C product page","https:\u002F\u002Fwww.eranntex.com\u002Fproducts\u002Fth-2000-c\u002F",{"text":6528},"; ",{"text":6530,"href":6531},"Oil & Gas industry page","https:\u002F\u002Fwww.eranntex.com\u002Findustries\u002Foil-and-gas\u002F",[6533],{"text":6534},"TH-2000-C sample temperature, distance, flow, pressure, outputs, application range and dust option; heat tracing of lines that can freeze.",{"id":2480,"cells":6536},[6537,6539,6545],[6538],{"text":2484},[6540,6542],{"text":6541},"Eranntex product specification table, fixed detectors; ",{"text":6543,"href":6544},"GTYQ-MIC-600 product page","https:\u002F\u002Fwww.eranntex.com\u002Fproducts\u002Fmic-600\u002F",[6546],{"text":6547},"MIC-600 operating humidity, sampling options and pretreatment grades.",{"id":2493,"cells":6549},[6550,6552,6556],[6551],{"text":2497},[6553,6555],{"text":6554},"Eranntex product specification table, sensor options; ",{"text":6543,"href":6544},[6557],{"text":6558},"Sensor T90 for H₂S, ammonia and methane.",{"id":2506,"cells":6560},[6561,6563,6568],[6562],{"text":2510},[6564,6566],{"text":6565,"href":2629},"OSHA Safety and Health Information Bulletin: Calibrating and Testing Direct-Reading Monitors",{"text":6567},", SHIB 11-26-2024 (US advisory guidance)",[6569],{"text":6570},"A bump test does not measure accuracy; sample tubing is a link in the calibration chain.",{"id":2519,"cells":6572},[6573,6575,6583],[6574],{"text":2523},[6576,6578,6581],{"text":6577},"US EPA ",{"text":6579,"href":6580},"Method 7E","https:\u002F\u002Fwww.ecfr.gov\u002Fcurrent\u002Ftitle-40\u002Fchapter-I\u002Fsubchapter-C\u002Fpart-60\u002Fappendix-Appendix%20A-4%20to%20Part%2060",{"text":6582},", 40 CFR Part 60, Appendix A-4, sections 3 and 6.1 (US reference method for stack testing with instrumental analyzers)",[6584],{"text":6585},"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":2532,"cells":6587},[6588,6590,6598],[6589],{"text":2536},[6591,6593,6596],{"text":6592},"Z. Zhu, H. Xin, H. Li, R. T. Burns, H. Dong, ",{"text":6594,"href":6595},"Assessment of in-line dust filter type and condition on ammonia adsorption","https:\u002F\u002Fagris.fao.org\u002Fsearch\u002Fen\u002Frecords\u002F65df338b4c5aef494fe0c901",{"text":6597},", Transactions of the ASABE 50(5), 1823–1830 (2007)",[6599],{"text":6600},"Ammonia taken up by paper and fuel filters, highest at first exposure; negligible uptake by PTFE filters.",[6602,6606,6610,6614,6618],{"id":6603,"question":6604,"answer":6605},"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":6607,"question":6608,"answer":6609},"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":6611,"question":6612,"answer":6613},"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":6615,"question":6616,"answer":6617},"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":6619,"question":6620,"answer":6621},"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":6623,"description":6624},"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":5926,"body":6627,"faq":7262,"mediaCaption":7278,"mediaLayout":2688,"market":323,"locale":324,"publication":7279,"seo":7280,"title":7283,"summary":7284},[6628,6659,6701,6768,6803,6879,6905,7010,7033,7087],{"id":5929,"heading":6629,"paragraphs":6630,"blocks":6632},"潮湿的池内空气应如何采样，才能测准 H₂S 和氨？",[6631],"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。",[6633,6636],{"kind":1016,"content":6634},[6635],{"text":6631},{"kind":1150,"ordered":569,"items":6637},[6638,6644,6650,6653],[6639,6641,6643],{"text":6640},"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":6642,"href":5944},"水分如何去除",{"text":2760},[6645,6647,6649],{"text":6646},"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":6648,"href":5951},"如何检查路径",{"text":2760},[6651],{"text":6652},"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。",[6654,6656,6658],{"text":6655},"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":6657,"href":5961},"管路长度与响应时间",{"text":2760},{"id":5964,"heading":6660,"paragraphs":6661,"blocks":6666},"为什么潮湿的样气管路会让 H₂S 和氨读数下降？",[6662,6663,6664,6665],"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。",[6667,6676,6687,6694],{"kind":1016,"content":6668},[6669,6671,6672,6673,6674],{"text":6670},"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":1338,"href":1339,"citation":10},{"text":1127},{"text":1183,"href":1184,"citation":10},{"text":6675},"这样一来，读数就取决于气体在管路中经历了什么。",{"kind":1016,"content":6677},[6678,6680,6681,6683,6684,6686],{"text":6679},"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":5986,"href":192},{"text":6682}," 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":1021,"href":1022,"citation":10},{"text":6685},"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":1338,"href":1339,"citation":10},{"kind":1016,"content":6688},[6689,6691,6692],{"text":6690},"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":1048,"href":1049,"citation":10},{"text":6693},"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":1016,"content":6695},[6696,6698,6700],{"text":6697},"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":6699,"href":79},"水与污水行业页面",{"text":2760},{"id":6008,"heading":6702,"paragraphs":6703,"blocks":6706},"如何去除水分而不损失气体？",[6704,6705],"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。",[6707,6715,6720,6760],{"kind":1016,"content":6708},[6709,6711,6712,6714],{"text":6710},"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":1021,"href":1022,"citation":10},{"text":6713},"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":1687,"href":1688,"citation":10},{"kind":1983,"items":6716},[6717],{"url":6025,"alt":6718,"caption":6719,"width":6028,"height":6029},"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":1150,"ordered":569,"items":6721},[6722,6734,6752],[6723,6725,6727,6728,6730,6731,6733],{"text":6724,"strong":10},"带自动排水的冷却环节。",{"text":6726},"对于示例 1 中厌氧池上方温暖潮湿的空气，",{"text":6038,"href":244},{"text":6729}," 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":1338,"href":1339,"citation":10},{"text":6732},"资料记载 TH-2000-C 正是以这种方式处理高湿、低尘样气。",{"text":1584,"href":1585,"citation":10},[6735,6737,6739,6740,6742,6743,6745,6746,6748,6749,6751],{"text":6736,"strong":10},"伴热管路与两级冷凝器。",{"text":6738},"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":1687,"href":1688,"citation":10},{"text":6741},"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":1129,"href":1130,"citation":10},{"text":6744},"在",{"text":6057,"href":132},{"text":6747}," 分析仪上，这种布置的作用就是减少水溶性组分的损失。",{"text":1312,"href":1313,"citation":10},{"text":6750},"室外管路可能结冰的地方，也会因此做伴热。",{"text":1584,"href":1585,"citation":10},[6753,6755,6757,6758,6759],{"text":6754,"strong":10},"简单预处理。",{"text":6756},"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":1584,"href":1585,"citation":10},{"text":1127},{"text":1021,"href":1022,"citation":10},{"kind":1016,"content":6761},[6762,6764,6766],{"text":6763},"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":6765,"href":5951},"整条路径的通气检查",{"text":6767},"能确认是否如此。",{"id":6081,"heading":6769,"paragraphs":6770,"blocks":6774},"怎样确认样气路径没有吸收气体？",[6771,6772,6773],"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。",[6775,6780,6790],{"kind":1016,"content":6776},[6777,6779],{"text":6778},"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":1687,"href":1688,"citation":10},{"kind":1016,"content":6781},[6782,6784,6785,6787,6788],{"text":6783},"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":1446,"href":1447,"citation":10},{"text":6786},"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":1691,"href":1692,"citation":10},{"text":6789},"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":1016,"content":6791},[6792,6794,6795,6797,6798,6799,6801],{"text":6793},"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":1659,"href":1660,"citation":10},{"text":6796},"冲击测试、标定检查和完整标定之间的区别，见",{"text":2723,"href":48},{"text":2760},{"text":6800,"href":6115},"水与污水页面",{"text":6802},"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":6119,"heading":6804,"paragraphs":6805,"blocks":6811},"示例 1：厌氧池上方 H₂S、甲烷等五种气体的报警",[6806,6807,6808,6809,6810],"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。",[6812,6817,6827,6866,6871,6876],{"kind":1016,"content":6813},[6814,6816],{"text":6815},"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":1338,"href":1339,"citation":10},{"kind":1016,"content":6818},[6819,6821,6822,6824,6825],{"text":6820},"逸云天提供了一套",{"text":6038,"href":244},{"text":6823}," 样气预处理系统，配一台可检测五种气体的",{"text":5986,"href":192},{"text":6826}," 检测器，装在室外防雨机柜中。规定的量程如下：",{"kind":1053,"caption":6828,"headers":6829,"rows":6835},"规定量程：厌氧池报警系统",[6830,6833],[6831],{"text":6832},"气体",[6834],{"text":3101},[6836,6842,6848,6854,6860],{"cells":6837},[6838,6840],[6839],{"text":1234},[6841],{"text":1371},{"cells":6843},[6844,6846],[6845],{"text":6162},[6847],{"text":6165},{"cells":6849},[6850,6852],[6851],{"text":1268},[6853],{"text":6172},{"cells":6855},[6856,6858],[6857],{"text":1923},[6859],{"text":1862},{"cells":6861},[6862,6864],[6863],{"text":6183},[6865],{"text":6186},{"kind":1016,"content":6867},[6868,6870],{"text":6869},"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":1338,"href":1339,"citation":10},{"kind":1016,"content":6872},[6873,6875],{"text":6874},"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":1338,"href":1339,"citation":10},{"kind":1016,"content":6877},[6878],{"text":6810},{"id":6201,"heading":6880,"paragraphs":6881,"blocks":6886},"示例 2：以 0.01 ppm 分辨率测量氨和 H₂S，评估处理效果",[6882,6883,6884,6885],"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]",[6887,6892,6897,6900],{"kind":1016,"content":6888},[6889,6891],{"text":6890},"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":1183,"href":1184,"citation":10},{"kind":1016,"content":6893},[6894,6896],{"text":6895},"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":1183,"href":1184,"citation":10},{"kind":1016,"content":6898},[6899],{"text":6884},{"kind":1016,"content":6901},[6902,6904],{"text":6903},"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":1446,"href":1447,"citation":10},{"id":6228,"heading":6906,"paragraphs":6907,"blocks":6909},"采样点的哪些条件会改变系统配置？",[6908],"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]",[6910,6915],{"kind":1016,"content":6911},[6912,6914],{"text":6913},"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":1450,"href":1451,"citation":10},{"kind":1053,"caption":6916,"headers":6917,"rows":6924},"采样点条件、需要增加的部件，以及逸云天资料所载的方案",[6918,6921],[6919],{"text":6920},"采样点条件",[6922],{"text":6923},"需要增加的部件，以及逸云天资料所载的方案",[6925,6942,6961,6978,6993],{"cells":6926},[6927,6930],[6928],{"text":6929},"样气温度高",[6931,6933,6935,6936,6937,6939,6941],{"text":6932,"strong":10},"增加：",{"text":6934}," 冷却采样手柄或冷却环节。",{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":6938,"strong":10},"资料所载：",{"text":6940}," 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":1584,"href":1585,"citation":10},{"cells":6943},[6944,6947],[6945],{"text":6946},"样气接近饱和或携带液体",[6948,6949,6951,6952,6953,6954,6956,6957,6958,6959,6960],{"text":6932,"strong":10},{"text":6950}," 在检测器前去除水分。",{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":6938,"strong":10},{"text":6955}," 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":1129,"href":1130,"citation":10},{"text":1127},{"text":1584,"href":1585,"citation":10},{"text":1127},{"text":1021,"href":1022,"citation":10},{"cells":6962},[6963,6966],[6964],{"text":6965},"粉尘",[6967,6968,6970,6971,6972,6973,6975,6976,6977],{"text":6932,"strong":10},{"text":6969}," 粉尘过滤，防止路径堵塞。",{"text":1450,"href":1451,"citation":10},{"text":1127},{"text":6938,"strong":10},{"text":6974}," 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":1584,"href":1585,"citation":10},{"text":1127},{"text":1021,"href":1022,"citation":10},{"cells":6979},[6980,6983],[6981],{"text":6982},"正压或抽吸",[6984,6985,6987,6988,6989,6990,6992],{"text":6932,"strong":10},{"text":6986}," 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":1450,"href":1451,"citation":10},{"text":1127},{"text":6938,"strong":10},{"text":6991}," 资料记载 TH-2000-C 可用于正压或负压采样点。",{"text":1584,"href":1585,"citation":10},{"cells":6994},[6995,6998],[6996],{"text":6997},"背景中有干扰性、腐蚀性或酸性气体",[6999,7000,7002,7003,7004,7005,7007,7008,7009],{"text":6932,"strong":10},{"text":7001}," 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":1450,"href":1451,"citation":10},{"text":1127},{"text":6938,"strong":10},{"text":7006}," 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":1183,"href":1184,"citation":10},{"text":1127},{"text":1446,"href":1447,"citation":10},{"id":6334,"heading":7011,"paragraphs":7012,"blocks":7016},"气体到达分析仪需要多长时间？",[7013,7014,7015],"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。",[7017,7022,7030],{"kind":1016,"content":7018},[7019,7021],{"text":7020},"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":1655,"href":1656,"citation":10},{"kind":1016,"content":7023},[7024,7026,7027,7029],{"text":7025},"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":1687,"href":1688,"citation":10},{"text":7028}," 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":1584,"href":1585,"citation":10},{"kind":1016,"content":7031},[7032],{"text":7015},{"id":6358,"heading":7034,"paragraphs":7035,"blocks":7038,"links":7074},"询价时应提供哪些信息？",[7036,7037],"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。",[7039,7042,7066],{"kind":1016,"content":7040},[7041],{"text":7036},{"kind":1150,"ordered":569,"items":7043},[7044,7047,7050,7053,7056,7059,7063],[7045],{"text":7046},"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。",[7048],{"text":7049},"水池或风管，以及采样点处于抽吸还是正压状态。",[7051],{"text":7052},"样气温度、含湿情况，以及管路经过的最冷位置。",[7054],{"text":7055},"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。",[7057],{"text":7058},"管路长度和走向，以及测量后的样气可以排放到哪里。",[7060,7062],{"text":7061},"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":1584,"href":1585,"citation":10},[7064],{"text":7065},"所在国家，以及机柜安装位置的危险区域划分。",{"kind":1016,"content":7067},[7068,7070,7072],{"text":7069},"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":7071,"href":274},"询价清单",{"text":7073},"列出了一般项目信息。",[7075,7081,7084],{"id":6401,"label":7076,"target":7077},"咨询污水池监测需求",{"kind":707,"path":308,"query":7078},{"type":6405,"context":7079,"gasRequirements":7080,"source":300},"污水池样气路径","硫化氢（H₂S）、氨（NH₃）",{"id":6409,"label":7082,"target":7083},"查看污水处理的监测任务",{"kind":707,"path":79},{"id":6413,"label":7085,"target":7086},"查看固定式与区域监测任务",{"kind":707,"path":35},{"id":2349,"heading":3900,"paragraphs":7088,"blocks":7090},[7089],"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。",[7091,7094],{"kind":1016,"content":7092},[7093],{"text":7089},{"kind":1053,"caption":7095,"headers":7096,"rows":7104},"本指南引用的来源",[7097,7099,7101],[7098],{"text":3912},[7100],{"text":3915},[7102],{"text":7103},"支撑内容",[7105,7125,7135,7145,7155,7165,7175,7185,7201,7213,7224,7236,7249],{"id":2371,"cells":7106},[7107,7109,7122],[7108],{"text":2375},[7110,7111,7113,7115,7117,7118,7120],{"text":6438},{"text":7112,"href":6441},"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":7114},"，Atmospheric Chemistry and Physics 23，10901–12440（2023）；条目：",{"text":7116,"href":6446},"氨",{"text":3508},{"text":7119,"href":6450},"硫化氢",{"text":7121},"，检索日期 2026 年 11 月 3 日",[7123],{"text":7124},"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":2384,"cells":7126},[7127,7129,7132],[7128],{"text":2388},[7130],{"text":7131},"逸云天 DOAS-3000 产品资料：样气预处理说明",[7133],{"text":7134},"伴热样气管路与露点 4–5 °C 的两级冷凝器。",{"id":2397,"cells":7136},[7137,7139,7142],[7138],{"text":2401},[7140],{"text":7141,"href":6473},"逸云天 DOAS-3000 产品页",[7143],{"text":7144},"伴热输送与两级冷凝，用于减少水溶性组分的损失。",{"id":2416,"cells":7146},[7147,7149,7152],[7148],{"text":2420},[7150],{"text":7151},"逸云天项目记录：厌氧污水池上方的五种气体监测系统",[7153],{"text":7154},"示例 1 的工况、配置、量程与调试；抽取式布置。",{"id":2428,"cells":7156},[7157,7159,7162],[7158],{"text":2432},[7160],{"text":7161},"逸云天配置记录：加盖污水储池上方的氨和 H₂S 监测",[7163],{"text":7164},"示例 2 的工况与配置；抽取式布置。",{"id":2441,"cells":7166},[7167,7169,7172],[7168],{"text":2445},[7170],{"text":7171},"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",[7173],{"text":7174},"进出口规格；发货前测试中发现的过滤器吸附问题。",{"id":2454,"cells":7176},[7177,7179,7182],[7178],{"text":2458},[7180],{"text":7181},"逸云天技术团队关于从管道和密闭空间采样的说明",[7183],{"text":7184},"会给样气路径增加部件的条件。",{"id":2467,"cells":7186},[7187,7189,7198],[7188],{"text":2471},[7190,7192,7194,7196],{"text":7191},"逸云天产品规格表（在线监测系统）；",{"text":7193,"href":6526},"TH-2000-C 产品页",{"text":7195},"；",{"text":7197,"href":6531},"油气行业页面",[7199],{"text":7200},"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":2480,"cells":7202},[7203,7205,7210],[7204],{"text":2484},[7206,7208],{"text":7207},"逸云天产品规格表（固定式检测器）；",{"text":7209,"href":6544},"GTYQ-MIC-600 产品页",[7211],{"text":7212},"MIC-600 的工作湿度、采样方式与预处理等级。",{"id":2493,"cells":7214},[7215,7217,7221],[7216],{"text":2497},[7218,7220],{"text":7219},"逸云天产品规格表（传感器选项）；",{"text":7209,"href":6544},[7222],{"text":7223},"H₂S、氨和甲烷传感器的 T90。",{"id":2506,"cells":7225},[7226,7228,7233],[7227],{"text":2510},[7229,7231],{"text":7230,"href":2629},"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":7232},"，SHIB 11-26-2024（美国咨询性指南）",[7234],{"text":7235},"冲击测试不能衡量准确度；采样管是标定链中的一环。",{"id":2519,"cells":7237},[7238,7240,7246],[7239],{"text":2523},[7241,7243,7244],{"text":7242},"美国 EPA ",{"text":6579,"href":6580},{"text":7245},"，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）",[7247],{"text":7248},"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":2532,"cells":7250},[7251,7253,7259],[7252],{"text":2536},[7254,7255,7257],{"text":6592},{"text":7256,"href":6595},"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":7258},"，Transactions of the ASABE 50(5)，1823–1830（2007）",[7260],{"text":7261},"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。",[7263,7266,7269,7272,7275],{"id":6603,"question":7264,"answer":7265},"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":6607,"question":7267,"answer":7268},"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":6611,"question":7270,"answer":7271},"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":6615,"question":7273,"answer":7274},"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":6619,"question":7276,"answer":7277},"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":568,"indexable":10},{"title":7281,"description":7282},"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。","污水 H₂S 监测：为潮湿的池内空气搭建气体采样系统","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":7287,"gasIds":7288,"industryIds":7289,"applicationIds":7290,"id":283,"slug":7291,"type":987,"status":559,"language":18,"issueDate":5912,"author":990,"media":7292,"certificateIds":7297,"marketContent":7298,"sources":7362},[193],[5907,64,5908],[72,76],[37,45],"industrial-gas-leak-detection-project-guide",{"id":7293,"url":7294,"alt":7295,"width":995,"height":996,"mimeType":675,"roles":7296},"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.",[4172,998],[],[7299,7333],{"market":17,"locale":18,"publication":7300,"title":7301,"summary":7302,"body":7303,"faq":7324,"seo":7329,"mediaCaption":7332,"mediaLayout":2688},{"status":568,"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.",[7304,7309,7314,7319],{"id":7305,"heading":7306,"paragraphs":7307},"leak-guide-scenario","Describe the release scenario",[7308],"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":7310,"heading":7311,"paragraphs":7312},"leak-guide-method","Choose the monitoring role",[7313],"Portable equipment supports inspection and investigation. Fixed gas leak detectors monitor selected locations continuously. Define which role is required before comparing model specifications.",{"id":7315,"heading":7316,"paragraphs":7317},"leak-guide-inputs","Specify the detector requirements",[7318],"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":7320,"heading":7321,"paragraphs":7322},"leak-guide-response","Plan the alarm response",[7323],"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.",[7325],{"id":7326,"question":7327,"answer":7328},"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":7330,"description":7331},"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.",{"market":323,"locale":324,"publication":7334,"title":7335,"summary":7336,"body":7337,"faq":7354,"seo":7358,"mediaCaption":7361,"mediaLayout":2688},{"status":568,"indexable":10},"如何明确工业气体泄漏检测项目的需求","从可能的泄漏点出发，明确检测仪、安装位置、信号和响应要求的实用指南。",[7338,7342,7346,7350],{"id":7305,"heading":7339,"paragraphs":7340},"描述泄漏场景",[7341],"从工艺、物质及设备、管道、储存、加工或输送区域周围可能的泄漏点入手。最终检测仪数量和位置取决于现场评估及项目要求。",{"id":7310,"heading":7343,"paragraphs":7344},"确定监测用途",[7345],"便携式设备用于巡检和调查。固定式气体泄漏检测仪持续监测选定位置。比较型号规格前，先明确需要承担哪项任务。",{"id":7315,"heading":7347,"paragraphs":7348},"明确检测仪要求",[7349],"记录气体、量程、采样限制、环境条件、安装位置、电源、输出信号及所需的现场报警。同时注明项目是否需要控制器、继电器或其他系统接口。",{"id":7320,"heading":7351,"paragraphs":7352},"规划报警响应",[7353],"说明报警需要传达到哪里，以及应触发哪些现场行动。技术团队可据此结合项目设计，审核检测仪输出和兼容接口。",[7355],{"id":7326,"question":7356,"answer":7357},"泄漏检测项目应使用便携式还是固定式检测仪？","两者承担不同任务。便携式设备用于移动检查；固定式设备持续监测选定点位。泄漏场景和响应方案决定项目需要其中一种，还是两种都需要。",{"title":7359,"description":7360},"工业气体泄漏检测项目指南","从泄漏场景、气体、量程、安装位置、信号集成和响应流程入手，明确工业气体泄漏检测项目的需求。","项目规划概念示意图，不是检测仪布点设计或实际泄漏测试。",[],{"productIds":7364,"gasIds":7365,"industryIds":7366,"applicationIds":7367,"id":275,"slug":7368,"type":987,"status":559,"language":18,"issueDate":5912,"author":990,"media":7369,"certificateIds":7376,"marketContent":7377,"sources":7485},[],[],[72,76,80],[37,41,45,49],"gas-detector-quotation-checklist",{"id":7370,"url":7371,"alt":7372,"width":995,"height":996,"mimeType":675,"roles":7373,"localizedAlt":7374},"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.",[4172,998],{"zh-CN":7375},"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。",[],[7378,7435],{"market":17,"locale":18,"publication":7379,"title":7380,"summary":7381,"body":7382,"seo":7419,"mediaCaption":7421,"mediaLayout":2688,"faq":7422},{"status":568,"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.",[7383,7392,7401,7410],{"id":7384,"heading":7385,"paragraphs":7386,"checklist":7388},"rfq-operating-context","Application and operating area",[7387],"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.",[7389,7390,7391],"Monitoring task and process area","Country of use and ambient conditions","Project-supplied area classification",{"id":7393,"heading":7394,"paragraphs":7395,"checklist":7397},"rfq-detection-requirement","Gas, range and simultaneous measurement",[7396],"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.",[7398,7399,7400],"Target gas, range and unit","Number of gases monitored at once","Sampling and response conditions",{"id":7402,"heading":7403,"paragraphs":7404,"checklist":7406},"rfq-integration","Installation, power and signals",[7405],"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.",[7407,7408,7409],"Available power and required outputs","Alarm and controller interfaces","Installation and sample-handling conditions",{"id":7411,"heading":7412,"paragraphs":7413,"checklist":7415},"rfq-documents","Documents and approval scope",[7414],"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.",[7416,7417,7418],"Datasheets, manuals and declarations","Destination-market requirements","Named certificate party and exact scope",{"title":7380,"description":7420},"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.",[7423,7427,7431],{"id":7424,"question":7425,"answer":7426},"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":7428,"question":7429,"answer":7430},"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":7432,"question":7433,"answer":7434},"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":7436,"mediaCaption":7469,"mediaLayout":2688,"faq":7470,"market":323,"locale":324,"publication":7480,"seo":7481,"title":7482,"summary":7484},[7437,7445,7453,7461],{"id":7384,"heading":7438,"paragraphs":7439,"checklist":7441},"应用与作业区域",[7440],"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。",[7442,7443,7444],"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":7393,"heading":7446,"paragraphs":7447,"checklist":7449},"气体、量程与同时测量",[7448],"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。",[7450,7451,7452],"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":7402,"heading":7454,"paragraphs":7455,"checklist":7457},"安装、供电与信号",[7456],"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。",[7458,7459,7460],"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":7411,"heading":7462,"paragraphs":7463,"checklist":7465},"文件与认证范围",[7464],"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。",[7466,7467,7468],"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。",[7471,7474,7477],{"id":7424,"question":7472,"answer":7473},"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":7428,"question":7475,"answer":7476},"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 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Compare supported gases, diffusion or pumped sampling, and model-specific logging and communication options.",[],[9005],{"id":8988,"heading":9006,"paragraphs":9007},"Selection notes",[9008,9009,9010,9011],"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":9001,"description":9014,"ogTitle":9015,"ogDescription":9014},"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",{"id":9017,"url":9018,"alt":9019,"localizedAlt":9020,"width":2021,"height":2021,"mimeType":675,"roles":9022},"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":9021},"逸云天 BTYQ-MS104K-L 便携式气体检测仪正面图。",[4172,998,9023],"gallery",{"id":121,"slug":9025,"name":9026,"description":9027,"marketContent":9028,"displayOrder":9060,"media":9061},"transportable-gas-detection","Transportable Gas Detection Systems","Hand-carried multi-gas analyzers and deployable area monitors for temporary site monitoring and field measurements.",[9029,9045],{"market":323,"locale":324,"publication":9030,"displayName":9031,"h1":9031,"intro":9032,"sections":9033,"selectionGuidance":9034,"featuredResourceIds":9041,"seo":9042},{"status":568,"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。",[],[9035],{"id":8988,"heading":8989,"paragraphs":9036},[9037,9038,9039,9040],"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":9031,"description":9043,"ogTitle":9044,"ogDescription":9043},"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":9046,"displayName":9026,"h1":9026,"intro":9047,"sections":9048,"selectionGuidance":9049,"featuredResourceIds":9056,"seo":9057},{"status":568,"indexable":10},"Choose based on the measurement task, sampling method, power requirements and documented communication options.",[],[9050],{"id":8988,"heading":9006,"paragraphs":9051},[9052,9053,9054,9055],"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":9026,"description":9058,"ogTitle":9059,"ogDescription":9058},"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":9062,"url":9063,"alt":9064,"localizedAlt":9065,"width":2021,"height":2021,"mimeType":675,"roles":9067},"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":9066},"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。",[4172,998,9023],{"id":101,"slug":9069,"name":9070,"description":9071,"marketContent":9072,"displayOrder":11,"media":9107},"fixed-gas-detection","Fixed Gas Detection","Fixed-point detectors and transmitters for continuous, 24\u002F7 safety monitoring across industrial facilities.",[9073,9090],{"market":323,"locale":324,"publication":9074,"displayName":9075,"h1":9075,"intro":9076,"sections":9077,"selectionGuidance":9078,"featuredResourceIds":9085,"seo":9086},{"status":568,"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。",[],[9079],{"id":8988,"heading":8989,"paragraphs":9080},[9081,9082,9083,9084],"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":9087,"description":9088,"ogTitle":9089,"ogDescription":9088},"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":9091,"displayName":9092,"h1":9092,"intro":9093,"sections":9094,"selectionGuidance":9095,"featuredResourceIds":9102,"seo":9103},{"status":568,"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.",[],[9096],{"id":8988,"heading":9006,"paragraphs":9097},[9098,9099,9100,9101],"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":9104,"description":9105,"ogTitle":9106,"ogDescription":9105},"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":9108,"url":9109,"alt":9110,"localizedAlt":9111,"width":9113,"height":9113,"mimeType":675,"roles":9114},"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":9112},"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,[4172,998,9023],{"id":109,"slug":9116,"name":9117,"description":9118,"marketContent":9119,"displayOrder":9154,"media":9155},"gas-alarm-controllers","Gas Detection Controllers","Control and annunciation equipment for gas detection installations.",[9120,9137],{"market":323,"locale":324,"publication":9121,"displayName":9122,"h1":9122,"intro":9123,"sections":9124,"selectionGuidance":9125,"featuredResourceIds":9132,"seo":9133},{"status":568,"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。",[],[9126],{"id":8988,"heading":8989,"paragraphs":9127},[9128,9129,9130,9131],"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":9134,"description":9135,"ogTitle":9136,"ogDescription":9135},"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":9138,"displayName":9139,"h1":9139,"intro":9140,"sections":9141,"selectionGuidance":9142,"featuredResourceIds":9149,"seo":9150},{"status":568,"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.",[],[9143],{"id":8988,"heading":9006,"paragraphs":9144},[9145,9146,9147,9148],"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":9151,"description":9152,"ogTitle":9153,"ogDescription":9152},"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":9156,"url":9157,"alt":9158,"localizedAlt":9159,"width":2021,"height":2021,"mimeType":675,"roles":9161},"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":9160},"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。",[4172,998,9023],{"id":113,"slug":9163,"name":9164,"description":9165,"marketContent":9166,"displayOrder":9201,"media":9202},"gas-monitoring-analysis-systems","Gas Monitoring & Analysis Systems","Online analysis, environmental monitoring and sample-conditioning systems.",[9167,9184],{"market":323,"locale":324,"publication":9168,"displayName":9169,"h1":9169,"intro":9170,"sections":9171,"selectionGuidance":9172,"featuredResourceIds":9179,"seo":9180},{"status":568,"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。",[],[9173],{"id":8988,"heading":8989,"paragraphs":9174},[9175,9176,9177,9178],"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":9181,"description":9182,"ogTitle":9183,"ogDescription":9182},"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":9185,"displayName":9186,"h1":9186,"intro":9187,"sections":9188,"selectionGuidance":9189,"featuredResourceIds":9196,"seo":9197},{"status":568,"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.",[],[9190],{"id":8988,"heading":9006,"paragraphs":9191},[9192,9193,9194,9195],"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":9198,"description":9199,"ogTitle":9200,"ogDescription":9199},"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":9203,"url":9204,"alt":9205,"localizedAlt":9206,"width":1548,"height":1548,"mimeType":675,"roles":9208},"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":9207},"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。",[4172,998,9023],{"id":105,"slug":9210,"name":9211,"description":9212,"marketContent":9213,"displayOrder":9248,"media":9249},"flame-detection","Flame Detection","Industrial flame detectors for fixed fire and process-risk monitoring.",[9214,9231],{"market":323,"locale":324,"publication":9215,"displayName":9216,"h1":9216,"intro":9217,"sections":9218,"selectionGuidance":9219,"featuredResourceIds":9226,"seo":9227},{"status":568,"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。",[],[9220],{"id":8988,"heading":8989,"paragraphs":9221},[9222,9223,9224,9225],"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":9228,"description":9229,"ogTitle":9230,"ogDescription":9229},"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":9232,"displayName":9233,"h1":9233,"intro":9234,"sections":9235,"selectionGuidance":9236,"featuredResourceIds":9243,"seo":9244},{"status":568,"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.",[],[9237],{"id":8988,"heading":9006,"paragraphs":9238},[9239,9240,9241,9242],"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":9245,"description":9246,"ogTitle":9247,"ogDescription":9246},"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":9250,"url":9251,"alt":9252,"localizedAlt":9253,"width":1548,"height":1548,"mimeType":675,"roles":9255},"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":9254},"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。",[4172,998,9023],{"id":97,"slug":9257,"name":9258,"description":9259,"marketContent":9260,"displayOrder":9294,"media":9295},"connected-monitoring-systems","Connected Monitoring Systems","Wireless gas detection networks paired with cloud-based dashboards for real-time fleet and site visibility.",[9261,9278],{"market":323,"locale":324,"publication":9262,"displayName":9263,"h1":9263,"intro":9264,"sections":9265,"selectionGuidance":9266,"featuredResourceIds":9273,"seo":9274},{"status":568,"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。",[],[9267],{"id":8988,"heading":8989,"paragraphs":9268},[9269,9270,9271,9272],"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":9275,"description":9276,"ogTitle":9277,"ogDescription":9276},"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":9279,"displayName":9258,"h1":9258,"intro":9280,"sections":9281,"selectionGuidance":9282,"featuredResourceIds":9289,"seo":9290},{"status":568,"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.",[],[9283],{"id":8988,"heading":9006,"paragraphs":9284},[9285,9286,9287,9288],"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":9291,"description":9292,"ogTitle":9293,"ogDescription":9292},"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":9296,"url":9297,"alt":9298,"localizedAlt":9299,"width":9301,"height":9302,"mimeType":675,"roles":9303},"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":9300},"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,[4172,998,9023],[9305],{"slug":9306,"marketContent":9307},"wireless-area-gas-monitoring",[9308],{"market":323,"displayName":9309},"无线区域气体监测",[9311,9316,9321,9326],{"slug":9312,"marketContent":9313},"personal-gas-monitoring",[9314],{"market":323,"displayName":9315},"个人气体监测",{"slug":9317,"marketContent":9318},"confined-space-entry",[9319],{"market":323,"displayName":9320},"受限空间作业",{"slug":9322,"marketContent":9323},"leak-detection",[9324],{"market":323,"displayName":9325},"泄漏检测",{"slug":9327,"marketContent":9328},"area-monitoring",[9329],{"market":323,"displayName":9330},"区域监测",[9332,9337,9342],{"slug":9333,"marketContent":9334},"oil-and-gas",[9335],{"market":323,"displayName":9336},"油气",{"slug":9338,"marketContent":9339},"chemical",[9340],{"market":323,"displayName":9341},"化工",{"slug":9343,"marketContent":9344},"water-and-wastewater",[9345],{"market":323,"displayName":9346},"水与污水",[9348,9351,9354,9357,9360,9363,9366,9369,9372,9375],{"slug":667,"type":668,"marketContent":9349},[9350],{"market":323,"title":721},{"slug":753,"type":668,"marketContent":9352},[9353],{"market":323,"title":802},{"slug":986,"type":987,"marketContent":9355},[9356],{"market":323,"title":2692},{"slug":4163,"type":668,"marketContent":9358},[9359],{"market":323,"title":4266},{"slug":4274,"type":668,"marketContent":9361},[9362],{"market":323,"title":4323},{"slug":4330,"type":668,"marketContent":9364},[9365],{"market":323,"title":4377},{"slug":4384,"type":987,"marketContent":9367},[9368],{"market":323,"title":5183},{"slug":5911,"type":987,"marketContent":9370},[9371],{"market":323,"title":7283},{"slug":7291,"type":987,"marketContent":9373},[9374],{"market":323,"title":7335},{"slug":7368,"type":987,"marketContent":9376},[9377],{"market":323,"title":7482},{"value":9379},{"brand":9380,"overseasLegalEntity":9382,"manufacturingLegalEntity":9385},{"name":9381},"Eranntex",{"id":9383,"legalNameEn":9384},"organization-eranntex","Shenzhen Eranntex Electronics Co., Ltd.",{"id":9383,"legalNameZh":9386,"legalNameEn":9387},"深圳市逸云天电子有限公司","Shenzhen Yiyuntian Electronics Co., Ltd.",{"value":9389},{"id":24,"identity":9390,"manufacturingEstablishedYear":9394,"brandEstablishedYear":9395,"industries":9396,"certificateIds":9406,"marketContent":9409,"sources":10177},{"brand":9391,"overseasLegalEntity":9392,"manufacturingLegalEntity":9393},{"name":9381},{"id":9383,"legalNameEn":9384},{"id":9383,"legalNameZh":9386,"legalNameEn":9387},2006,2014,[9397,9398,9399,9400,9401,9402,9403,9404,9405],"Oil and gas","Chemical processing","Gas transmission and storage","Municipal gas","Fire safety","Environmental monitoring","Metallurgy","Biopharmaceuticals","Energy and power",[9407,9408],"certificate-iso-14001-2024","certificate-high-tech-enterprise-2023",[9410,9861],{"market":17,"locale":18,"publication":9411,"displayName":9412,"intro":9413,"mission":9414,"values":9415,"valuesStatement":9420,"portfolioSummary":9421,"overviewSections":9422,"operatingModel":9441,"qualityIntro":9467,"history":9468,"contact":9492,"heroMedia":9524,"storyMedia":9529,"manufacturing":9535,"seo":9858},{"status":568,"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.",[9416,9417,9418,9419],"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.",[9423,9429,9435],{"id":9424,"heading":9425,"paragraphs":9426},"company-foundation","Gas detection equipment from Shenzhen",[9427,9428],"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":9430,"heading":9431,"paragraphs":9432},"company-technical-development","Equipment design, manufacture and project review",[9433,9434],"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":9436,"heading":9437,"paragraphs":9438},"company-customer-commitment","From technical enquiry to a defined scope",[9439,9440],"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.",[9442,9447,9452,9457,9462],{"id":9443,"heading":9444,"paragraphs":9445},"company-requirement-definition","Application and site conditions",[9446],"Record the monitoring task, target gases and ranges, location, ambient conditions and any area classification supplied by the project.",{"id":9448,"heading":9449,"paragraphs":9450},"company-solution-design","Measurement and sampling",[9451],"Compare portable, fixed and online approaches against the number of gases to monitor at once, sampling method and response conditions.",{"id":9453,"heading":9454,"paragraphs":9455},"company-product-realization","Configuration and interfaces",[9456],"Check model-level gas options separately from any confirmed orderable configuration. For fixed systems, record power, signals, alarms and controller interfaces.",{"id":9458,"heading":9459,"paragraphs":9460},"company-installation-commissioning","Documents and project scope",[9461],"Match requested manuals, drawings, declarations and certificates to the exact model or configuration. Define installation and commissioning responsibilities in the project scope.",{"id":9463,"heading":9464,"paragraphs":9465},"company-service-operation","Operation and service planning",[9466],"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.",[9469,9475,9481,9487],{"period":9470,"heading":9471,"paragraphs":9472},"2006–2010","Early portable and fixed instruments",[9473,9474],"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":9476,"heading":9477,"paragraphs":9478},"2013–2014","R&D center and Eranntex brand",[9479,9480],"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":9482,"heading":9483,"paragraphs":9484},"2017–2019","Cloud monitoring and analytical methods",[9485,9486],"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":9488,"heading":9489,"paragraphs":9490},"2020–2026","Intelligent instruments and software",[9491],"Work in 2023 included higher-end gas detectors, intelligent instruments and supporting software systems.",{"headquartersName":9493,"addressLines":9494,"location":9498,"mainPhone":9507,"mainPhoneExtension":9508,"salesEmail":9509,"salesRegions":9510,"serviceContacts":9523},"Shenzhen office and factory",[9495,9496,9497],"Unit B, 7\u002FF, Building 10, Rundongsheng Industrial Zone","Longzhu Community, Xixiang Subdistrict, Bao'an District","Shenzhen, Guangdong, China",{"registeredAddressZh":9499,"postalAddress":9500,"googleMapsQuery":9504,"baiduMapsQuery":9505,"appleMapsQuery":9505,"amapPoiId":9506},"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":9501,"addressLocality":9502,"addressRegion":9503,"addressCountry":323},"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",[9511,9515,9519],{"id":9512,"name":9513,"coverage":9514},"americas","Americas","North America, Central America, South America and the Caribbean",{"id":9516,"name":9517,"coverage":9518},"europe","Europe","European Union, United Kingdom and other European markets",{"id":9520,"name":9521,"coverage":9522},"asia-pacific","Asia-Pacific and other markets","Asia-Pacific, Middle East, Africa and markets not listed above",[],{"id":9525,"url":9526,"alt":9527,"width":1989,"height":9528,"mimeType":675},"media-facility-reception","\u002Fimages\u002Fcompany\u002Ffacility\u002Freception.webp","Eranntex reception desk with the Eranntex and 逸云天 name wall",1200,{"id":9530,"url":9531,"alt":9532,"width":9533,"height":9534,"mimeType":899},"media-company-story-representative","\u002Fimages\u002Findustries\u002Fchemical-processing-v2.png","Safety technician checking industrial process equipment with a gas detector",1536,1024,{"displayName":9536,"eyebrow":9537,"h1":9538,"intro":9539,"heroMedia":9540,"heroClip":9544,"facts":9552,"video":9570,"routeHeading":9589,"routeIntro":9590,"route":9591,"routeFinale":9652,"galleryAreas":9655,"gallery":9669,"invitation":9770,"seo":9855},"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":9541,"url":9542,"alt":9543,"width":757,"height":758,"mimeType":675},"media-facility-production-line-2026","\u002Fimages\u002Fcompany\u002Ffacility\u002Fproduction-line-2026.webp","Eranntex production floor with assembly benches and staff at work, March 2026",{"url":9545,"mimeType":9546,"width":4334,"height":9547,"poster":9548},"\u002Fvideos\u002Fcompany\u002Fline-hero.mp4","video\u002Fmp4",470,{"id":9549,"url":9550,"alt":9551,"width":4334,"height":9547,"mimeType":675},"media-facility-line-hero-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-hero-poster.webp","Eranntex production floor with staff at the assembly lines",[9553,9558,9564],{"id":9554,"label":9555,"value":9556},"production-lines","Production lines",{"value":4713,"unit":3492,"qualifier":9557},"exact",{"id":9559,"label":9560,"value":9561},"daily-capacity","Daily capacity",{"value":9562,"unit":9563,"qualifier":9557},500,"units",{"id":9565,"label":9566,"value":9567},"floor-area","Factory and office space",{"value":9568,"unit":9569,"qualifier":9557},6000,"m²",{"id":9571,"url":9572,"mimeType":9546,"width":4334,"height":4335,"durationSeconds":9573,"recordedDate":9574,"title":9575,"description":9576,"scopeNote":9577,"transcript":9578,"poster":9585},"video-verified-supplier-2026","\u002Fvideos\u002Fcompany\u002Fverified-supplier-2026.mp4",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.",[9579,9580,9581,9582,9583,9584],"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":9586,"url":9587,"alt":9588,"width":4334,"height":4335,"mimeType":675},"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.",[9592,9604,9616,9628,9640],{"id":9593,"label":9594,"heading":9595,"fact":9596,"text":9597,"clip":9598},"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":9599,"mimeType":9546,"width":4334,"height":9547,"poster":9600},"\u002Fvideos\u002Fcompany\u002Fline-arrival.mp4",{"id":9601,"url":9602,"alt":9603,"width":4334,"height":9547,"mimeType":675},"media-facility-line-arrival-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-arrival-poster.webp","Eranntex name wall in the reception area",{"id":9605,"label":9606,"heading":9607,"fact":9608,"text":9609,"clip":9610},"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":9611,"mimeType":9546,"width":4334,"height":9547,"poster":9612},"\u002Fvideos\u002Fcompany\u002Fline-engineering.mp4",{"id":9613,"url":9614,"alt":9615,"width":4334,"height":9547,"mimeType":675},"media-facility-line-engineering-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-engineering-poster.webp","Engineer reviewing a circuit board layout on screen",{"id":9617,"label":9618,"heading":9619,"fact":9620,"text":9621,"clip":9622},"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":9623,"mimeType":9546,"width":4334,"height":9547,"poster":9624},"\u002Fvideos\u002Fcompany\u002Fline-production.mp4",{"id":9625,"url":9626,"alt":9627,"width":4334,"height":9547,"mimeType":675},"media-facility-line-production-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-production-poster.webp","Portable gas detectors being checked on an assembly bench",{"id":9629,"label":9630,"heading":9631,"fact":9632,"text":9633,"clip":9634},"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":9635,"mimeType":9546,"width":4334,"height":9547,"poster":9636},"\u002Fvideos\u002Fcompany\u002Fline-calibration.mp4",{"id":9637,"url":9638,"alt":9639,"width":4334,"height":9547,"mimeType":675},"media-facility-line-calibration-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-calibration-poster.webp","Staff working at the calibration hoods",{"id":9641,"label":9642,"heading":9643,"fact":9644,"text":9645,"clip":9646},"stop-shipment","Shipment","Stock and dispatch","On-site warehouse","Finished batches are staged, packed and stored on site until they ship.",{"url":9647,"mimeType":9546,"width":4334,"height":9547,"poster":9648},"\u002Fvideos\u002Fcompany\u002Fline-shipment.mp4",{"id":9649,"url":9650,"alt":9651,"width":4334,"height":9547,"mimeType":675},"media-facility-line-shipment-poster","\u002Fimages\u002Fcompany\u002Ffacility\u002Fline-shipment-poster.webp","Packed cartons stacked in the warehouse",{"heading":9653,"text":9654},"Next stop: your visit","See it all in a single morning, with time to test samples against your own requirements.",[9656,9658,9660,9663,9666],{"area":9657,"label":9606,"fact":9608},"development",{"area":9659,"label":9618,"fact":9620},"production",{"area":9661,"label":9662,"fact":9632},"testing","Calibration & testing",{"area":9664,"label":9665,"fact":9644},"shipment","Stock & shipment",{"area":9667,"label":9668,"fact":9596},"site","Offices & people",[9670,9673,9676,9682,9688,9695,9701,9707,9714,9720,9727,9733,9740,9746,9752,9758,9764],{"area":9667,"media":9671,"caption":9672},{"id":9525,"url":9526,"alt":9527,"width":1989,"height":9528,"mimeType":675},"Reception, where we welcome visitors.",{"area":9659,"media":9674,"caption":9675},{"id":9541,"url":9542,"alt":9543,"width":757,"height":758,"mimeType":675},"Production floor, March 2026.",{"area":9661,"media":9677,"caption":9681},{"id":9678,"url":9679,"alt":9680,"width":1989,"height":9528,"mimeType":675},"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":9659,"media":9683,"caption":9687},{"id":9684,"url":9685,"alt":9686,"width":1989,"height":9528,"mimeType":675},"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":9657,"media":9689,"caption":9694},{"id":9690,"url":9691,"alt":9692,"width":1989,"height":9693,"mimeType":675},"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":9661,"media":9696,"caption":9700},{"id":9697,"url":9698,"alt":9699,"width":1989,"height":9693,"mimeType":675},"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":9664,"media":9702,"caption":9706},{"id":9703,"url":9704,"alt":9705,"width":1989,"height":9528,"mimeType":675},"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":9667,"media":9708,"caption":9713},{"id":9709,"url":9710,"alt":9711,"width":757,"height":9712,"mimeType":675},"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":9661,"media":9715,"caption":9719},{"id":9716,"url":9717,"alt":9718,"width":1989,"height":9693,"mimeType":675},"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":9657,"media":9721,"caption":9726},{"id":9722,"url":9723,"alt":9724,"width":1989,"height":9725,"mimeType":675},"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":9664,"media":9728,"caption":9732},{"id":9729,"url":9730,"alt":9731,"width":1989,"height":9528,"mimeType":675},"media-facility-warehouse","\u002Fimages\u002Fcompany\u002Ffacility\u002Fwarehouse.webp","Wall of packed cartons in the on-site warehouse","Packed cartons in the warehouse.",{"area":9667,"media":9734,"caption":9739},{"id":9735,"url":9736,"alt":9737,"width":1989,"height":9738,"mimeType":675},"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":9659,"media":9741,"caption":9745},{"id":9742,"url":9743,"alt":9744,"width":1989,"height":9528,"mimeType":675},"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":9661,"media":9747,"caption":9751},{"id":9748,"url":9749,"alt":9750,"width":1989,"height":9528,"mimeType":675},"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":9664,"media":9753,"caption":9757},{"id":9754,"url":9755,"alt":9756,"width":1989,"height":9528,"mimeType":675},"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":9667,"media":9759,"caption":9763},{"id":9760,"url":9761,"alt":9762,"width":1989,"height":9693,"mimeType":675},"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":9667,"media":9765,"caption":9769},{"id":9766,"url":9767,"alt":9768,"width":1989,"height":9693,"mimeType":675},"media-facility-recognition-plaques","\u002Fimages\u002Fcompany\u002Ffacility\u002Frecognition-plaques.webp","Six recognition plaques mounted on the showroom wall","Recognition plaques in the showroom.",{"heading":9771,"backdrop":9772,"letter":9773,"host":9777,"agendaHeading":9784,"agenda":9785,"agendaNote":9814,"prepared":9815,"travel":9820,"formHeading":9840,"formIntro":9841,"interests":9842,"needs":9847,"visitMessage":9853,"videoTourMessage":9854},"Come and see it for yourself",{"id":9525,"url":9526,"alt":9527,"width":1989,"height":9528,"mimeType":675},[9774,9775,9776],"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":9778,"title":9779,"organization":9384,"portrait":9780},"Cui Dian","General Manager",{"id":9781,"url":9782,"alt":9783,"width":2021,"height":1548,"mimeType":675},"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",[9786,9790,9794,9798,9802,9806,9810],{"id":9787,"heading":9788,"text":9789},"agenda-pickup","Airport pickup","From Shenzhen Bao'an International Airport, about 13 km away.",{"id":9791,"heading":9792,"text":9793},"agenda-briefing","Welcome and briefing","In our meeting room, with English documentation and brochures ready.",{"id":9795,"heading":9796,"text":9797},"agenda-lines","Production line tour","See assembly and bench testing up close.",{"id":9799,"heading":9800,"text":9801},"agenda-calibration","Calibration demonstration","Watch an instrument being calibrated with calibration gas.",{"id":9803,"heading":9804,"text":9805},"agenda-samples","Sample testing","We test product samples against your requirements.",{"id":9807,"heading":9808,"text":9809},"agenda-lunch","Lunch","A chance to talk through your project.",{"id":9811,"heading":9812,"text":9813},"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.",[9816,9817,9818,9819],"Meeting room","English documentation","Product samples","Brochures",[9821,9828,9832,9836],{"id":9822,"heading":9823,"text":9824,"figure":9825},"travel-szx","From Shenzhen Bao'an Airport (SZX)","by road to the factory, and we can pick you up",{"value":9826,"unit":9827},13,"km",{"id":9829,"heading":9830,"text":9831},"travel-hk","Arriving via Hong Kong","Let us know how you are crossing into Shenzhen and we will plan the transfer with you.",{"id":9833,"heading":9834,"text":9835},"travel-visa","Business visa","We will send you a business invitation letter once your visit is confirmed.",{"id":9837,"heading":9838,"text":9839},"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.",[9843,9844,9845,9846,9800,9804],"Portable gas detectors","Fixed gas detectors","Controllers and systems","Gas analyzers",[9848,9850],{"id":9849,"label":9788},"pickup",{"id":9851,"label":9852},"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":9856,"description":9857},"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. 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进行工厂实时视频参观。","预约参观","我们会通过邮件回复，确认日期并与您一起安排当天行程。",[9843,9844,9845,9846,9800,9804],[8983,9075,10130,10131,10095,10098],"控制器与系统","气体分析仪",[10133,10134],{"id":9849,"label":10086,"submitLabel":9788},{"id":9851,"label":10135,"submitLabel":9852},"商务签证邀请函","您好，我想预约参观逸云天深圳工厂。","您好，我想预约逸云天工厂的实时视频参观。",{"title":10139,"description":10140},"逸云天深圳气体检测仪工厂","了解逸云天深圳气体检测仪工厂：12 条生产线、标定区和厂内仓库。可观看供应商核验视频，或预约到访。",[10142,10146,10150,10154],{"period":9470,"heading":10143,"paragraphs":10144},"早期便携式与固定式仪器",[10145],"深圳市逸云天电子有限公司成立于 2006 年。早期产品包括便携式与手持泵吸式检测仪，其后扩展至固定式气体检测仪；设备范围逐步覆盖工业与环境监测应用。",{"period":9476,"heading":10147,"paragraphs":10148},"研发中心与 Eranntex 品牌",[10149],"2013 年设立专门研发中心，支持更高端气体分析仪器的研发。2014 年推出 Eranntex 作为公司独立品牌。",{"period":9482,"heading":10151,"paragraphs":10152},"云监测与分析方法",[10153],"研发扩展至远程气体监测与联网平台；气体监测云平台于 2018 年投入使用，成为整体集成监测工作的一部分。至 2019 年，在激光分析、差分紫外分析与 CEMS 相关系统方面取得进展。",{"period":9488,"heading":10155,"paragraphs":10156},"智能仪器与软件",[10157],"2023 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System",[10732,10737,10740,10744,10748,10752,10757,10761,10765,10769],{"id":10733,"gasId":64,"range":10734},"reviewed-4dbb3de31e14",{"min":10735,"max":1556,"unit":10736},0,"mg\u002Fm3",{"id":10738,"gasId":5908,"range":10739},"reviewed-d69686af461e",{"min":10735,"max":1556,"unit":10736},{"id":10741,"gasId":10742,"range":10743},"reviewed-a4347d8b5ae5","gas-voc",{"min":10735,"max":1556,"unit":10736},{"id":10745,"gasId":10746,"range":10747},"reviewed-ac0428982b87","gas-cs2",{"min":10735,"max":1556,"unit":10736},{"id":10749,"gasId":10750,"range":10751},"reviewed-b5245597787b","gas-c8h8",{"min":10735,"max":1556,"unit":10736},{"id":10753,"gasId":10754,"range":10755},"reviewed-26b1a9960fbf","gas-odor",{"min":10735,"max":757,"unit":10756},"dimensionless",{"id":10758,"gasId":10759,"range":10760},"reviewed-bf92398f9f54","gas-trimethylamine",{"min":10735,"max":1556,"unit":10736},{"id":10762,"gasId":10763,"range":10764},"reviewed-35b025758355","gas-methanethiol",{"min":10735,"max":1556,"unit":10736},{"id":10766,"gasId":10767,"range":10768},"reviewed-7c7d86d69e93","gas-dimethyl-sulfide",{"min":10735,"max":1556,"unit":10736},{"id":10770,"gasId":10771,"range":10772},"reviewed-bc4040c2e195","gas-dimethyl-disulfide",{"min":10735,"max":1556,"unit":10736},{"id":245,"slug":10774,"modelCode":6038,"productType":10668,"categoryId":113,"samplingMethod":10775,"specifications":10776,"resourceIds":10785,"industryIds":10786,"applicationIds":10787,"flexibleAttributes":10788,"certifications":10829,"certificatePreviewCount":10241,"evidenceScope":23,"evidenceEntries":10830,"media":10835,"marketContent":10841,"supportedDetectionOptions":10867},"th-2000-c","pump",{"ipRating":10366,"dimensions":10777,"operatingTemperature":10779,"samplingMethod":10775,"weight":10783,"displaySize":10784},{"unit":10186,"sourceText":10778},"500 × 350 × 850 mm (L × W × H)",{"min":10780,"max":10782},{"value":10781,"unit":10191,"qualifier":9557},-40,{"value":9294,"unit":10191,"qualifier":9557},{"value":9154,"unit":10368,"qualifier":10369},{"value":10674,"unit":10195,"qualifier":9557},[5679,301],[72,76,80],[37],[10789,10793,10797,10801,10805,10809,10811,10815,10819,10821,10825],{"key":10790,"label":10791,"value":10792,"group":10207},"supported-media","Documented measurement media","SO₂, NOₓ, O₂, CH₄, CO, CO₂, NH₃, H₂S, VOC and TVOC; site-specific gases and ranges require project confirmation",{"key":10794,"label":10795,"value":10796,"group":10207},"sampling-temperature","Sampling temperature","−40 to 600 °C standard; configurations up to 1300 °C optional",{"key":10798,"label":10799,"value":10800,"group":10207},"sampling-humidity","Sampling humidity","0–99% RH",{"key":10802,"label":10803,"value":10804,"group":10207},"sampling-distance","Sampling distance","30–40 m standard; over 70 m with optional vacuum pump",{"key":10806,"label":10807,"value":10808,"group":10207},"sampling-flow","Sampling flow","2 L\u002Fmin standard; 4 L\u002Fmin optional",{"key":10209,"label":10210,"value":10810,"group":10207},"4–20 mA, RS485 and passive contacts; wireless or network transmission optional",{"key":10812,"label":10813,"value":10814,"group":10207},"display","Display","7-inch color touchscreen",{"key":10816,"label":10817,"value":10818,"group":10207},"storage-option","Storage option","100,000 records or 16 GB removable storage optional",{"key":10225,"label":10226,"value":10820,"group":10207},"220 V AC, 50 Hz",{"key":10822,"label":10823,"value":10824,"group":10207},"enclosure","Enclosure","IP66 outdoor type; explosion-protected configuration optional",{"key":10826,"label":10827,"value":10828,"group":10207},"sample-conditioning","Sample conditioning","Cooling, moisture removal, filtration and drainage; treatment stages depend on the specified configuration",[],[10831,10833],{"id":9408,"kind":10244,"scope":23,"certificateId":9408,"productIds":10832},[],{"id":9407,"kind":10244,"scope":23,"certificateId":9407,"productIds":10834},[],[10836],{"id":10837,"url":10838,"alt":10839,"width":9113,"height":9113,"mimeType":675,"roles":10840},"media-th-2000-c-1","\u002Fimages\u002Fproducts\u002Feranntex-gas-online-monitoring-pretreatment-system-th-2000-c-front-view.webp","Perspective front view of the Eranntex TH-2000-C gas online monitoring pretreatment system cabinet featuring a digital HMI screen, dual lockable compartments, and side cooling louvers.",[4172,998,9023],[10842,10865],{"market":323,"locale":324,"displayName":10843,"shortDescription":10844,"masterText":10845},"TH-2000-C 气体样气处理与在线监测系统","面向高温高湿工艺气体的采样、处理与分析一体化项目配置系统。",{"Technical":10259,"Power supply":10260,"Signal output":10262,"Display":10846,"30–40 m standard; over 70 m with optional vacuum pump":10847,"Sampling distance":10848,"Sampling flow":10849,"Sampling humidity":10850,"Sampling temperature":10851,"2 L\u002Fmin standard; 4 L\u002Fmin optional":10852,"Enclosure":10853,"−40 to 600 °C standard; configurations up to 1300 °C optional":10854,"100,000 records or 16 GB removable storage optional":10855,"4–20 mA, RS485 and passive contacts; wireless or network transmission optional":10856,"7-inch color touchscreen":10857,"Cooling, moisture removal, filtration and drainage; treatment stages depend on the specified configuration":10858,"Documented measurement media":10859,"IP66 outdoor type; explosion-protected configuration optional":10860,"Perspective front view of the Eranntex TH-2000-C gas online monitoring pretreatment system cabinet featuring a digital HMI screen, dual lockable compartments, and side cooling louvers.":10861,"Sample conditioning":10862,"SO₂, NOₓ, O₂, CH₄, CO, CO₂, NH₃, H₂S, VOC and TVOC; site-specific gases and ranges require project confirmation":10863,"Storage option":10864},"显示屏","标准 30–40 m；选配真空泵时超过 70 m","采样距离","采样流量","样气湿度","样气温度","标准 2 L\u002Fmin；4 L\u002Fmin 选配","机柜","标准 −40 至 600 °C；可选最高 1300 °C 的配置","100,000 条记录，或选配 16 GB 可移动存储","4–20 mA、RS485 和无源触点；无线或网络传输选配","7 英寸彩色触摸屏","冷却、除湿、过滤和排水；处理环节取决于指定的配置","资料记载的测量介质","IP66 户外型；防爆配置选配","逸云天 TH-2000-C 气体在线监测预处理系统机柜正面透视图，可见数字人机界面屏、两个可上锁隔仓和侧面散热百叶。","样气预处理","SO₂、NOₓ、O₂、CH₄、CO、CO₂、NH₃、H₂S、VOC 和 TVOC；现场具体气体和量程需按项目确认","存储选项",{"market":17,"locale":18,"displayName":10866,"shortDescription":5695},"TH-2000-C Gas Sample Conditioning and Online Monitoring 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gases, noise, solar radiation and radiation monitoring can be configured for the project",{"key":10889,"label":10890,"value":10891,"group":10207},"enclosure-maintenance","Enclosure maintenance requirement","Maintain enclosure sealing to IP55 or higher; this is a maintenance requirement, not a product certification claim",{"key":10893,"label":10894,"value":10895,"group":10207},"sampling-maintenance","Sampling-pump maintenance check","Verify pump flow within the documented 1.5–2.5 L\u002Fmin maintenance range",[],[10898,10900],{"id":9408,"kind":10244,"scope":23,"certificateId":9408,"productIds":10899},[],{"id":9407,"kind":10244,"scope":23,"certificateId":9407,"productIds":10901},[],[10903],{"id":10904,"url":10905,"alt":10906,"width":10907,"height":10908,"mimeType":675,"roles":10909},"media-th-2000-aqi-frontend-fit-20261020","\u002Fimages\u002Fproducts\u002Ffrontend-fit-20261020\u002Feranntex-th-2000-aqi-frontend-fit-20261020.webp","Eranntex TH-2000-AQI product view.",559,1355,[4172,998,9023],[10911,10926],{"market":323,"locale":324,"displayName":10912,"shortDescription":10913,"masterText":10914},"TH-2000-AQI 微型环境空气质量监测站","用于气态污染物、颗粒物与气象参数实时监测的紧凑型模块化监测站。",{"Technical":10259,"Additional monitoring options":10915,"Documented pollutants":10916,"Enclosure maintenance requirement":10917,"Eranntex TH-2000-AQI product view.":10918,"Maintain enclosure sealing to IP55 or higher; this is a maintenance requirement, not a product certification claim":10919,"Meteorological options":10920,"Other gases, noise, solar radiation and radiation monitoring can be configured for the project":10921,"PM2.5, PM10, SO₂, NO₂, CO and O₃; installed sensors depend on the order specification":10922,"Sampling-pump maintenance check":10923,"Temperature, humidity, atmospheric pressure, wind speed, wind direction, precipitation and illuminance":10924,"Verify pump flow within the documented 1.5–2.5 L\u002Fmin maintenance range":10925},"其他监测选项","资料记载的污染物","机箱维护要求","逸云天 TH-2000-AQI 产品图。","机箱密封须保持在 IP55 或以上；这是维护要求，不是产品认证声明","气象选项","可按项目配置其他气体、噪声、太阳辐射和辐射监测","PM2.5、PM10、SO₂、NO₂、CO 和 O₃；安装的传感器取决于订货规格","采样泵维护检查","温度、湿度、气压、风速、风向、降水量和照度","核查泵流量是否在资料规定的 1.5–2.5 L\u002Fmin 维护范围内",{"market":17,"locale":18,"displayName":10927,"shortDescription":5672},"TH-2000-AQI Micro Ambient Air Monitoring Station",[],{"id":133,"slug":10930,"modelCode":6057,"productType":10931,"categoryId":113,"samplingMethod":10775,"specifications":10932,"resourceIds":10941,"industryIds":10942,"applicationIds":10943,"flexibleAttributes":10944,"certifications":10967,"certificatePreviewCount":10241,"evidenceScope":23,"evidenceEntries":10968,"media":10973,"marketContent":10979,"supportedDetectionOptions":10997},"doas-3000","gas_analyzer",{"dimensions":10933,"operatingTemperature":10935,"displaySize":10938,"storageCapacity":10940,"samplingMethod":10775},{"unit":10186,"sourceText":10934},"800 × 450 × 1800 mm",{"min":10936,"max":10937},{"value":10781,"unit":10191,"qualifier":9557},{"value":9294,"unit":10191,"qualifier":9557},{"value":10939,"unit":10195,"qualifier":9557},9,{"value":10676,"unit":10677,"qualifier":9557},[5633,301],[76],[],[10945,10949,10953,10957,10959,10960,10961,10962,10964,10966],{"key":10946,"label":10947,"value":10948,"group":10207},"supported-gases","Documented measurement scope","NO, NO₂, SO₂, NH₃, H₂S, O₃, benzene, toluene and xylene; the document does not assign every listed range to every gas",{"key":10950,"label":10951,"value":10952,"group":10207},"measurement-range","Documented range options","0–2, 10, 20, 50, 100, 500, 1000 or 2000 ppm or mg\u002Fm³; gas-to-range selection requires project confirmation",{"key":10954,"label":10955,"value":10956,"group":10207},"measurement-principle","Measurement principle","Differential ultraviolet absorption spectroscopy",{"key":10794,"label":10795,"value":10958,"group":10207},"-40 to 600 °C standard; 800–1300 °C configurations optional",{"key":10798,"label":10799,"value":10800,"group":10207},{"key":10802,"label":10803,"value":10804,"group":10207},{"key":10806,"label":10807,"value":10808,"group":10207},{"key":10209,"label":10210,"value":10963,"group":10207},"4–20 mA, RS485 and multiple passive contacts; wireless or network transmission optional",{"key":10822,"label":10823,"value":10965,"group":10207},"Outdoor waterproof cabinet; explosion-protected configuration optional",{"key":10225,"label":10226,"value":10820,"group":10207},[],[10969,10971],{"id":9408,"kind":10244,"scope":23,"certificateId":9408,"productIds":10970},[],{"id":9407,"kind":10244,"scope":23,"certificateId":9407,"productIds":10972},[],[10974],{"id":10975,"url":10976,"alt":10977,"width":2021,"height":2021,"mimeType":675,"roles":10978},"media-doas-3000-1","\u002Fimages\u002Fproducts\u002Feranntex-cems-online-doas-gas-analyzer-cabinet-doas-3000-front-view.webp","Front view of the Eranntex DOAS-3000 online CEMS differential optical absorption spectrometer gas analyzer cabinet featuring a clear glass observation door and multi-tier monitoring displays.",[4172,998,9023],[10980,10995],{"market":323,"locale":324,"displayName":10981,"shortDescription":10982,"masterText":10983},"DOAS-3000 在线差分紫外气体分析仪","面向严苛工艺气体的在线差分紫外分析仪，配备加热采样与强化样气处理。",{"Technical":10259,"Power supply":10260,"Signal output":10262,"30–40 m standard; over 70 m with optional vacuum pump":10847,"Sampling distance":10848,"Sampling flow":10849,"Sampling humidity":10850,"Sampling temperature":10851,"2 L\u002Fmin standard; 4 L\u002Fmin optional":10852,"4–20 mA, RS485 and multiple passive contacts; wireless or network transmission optional":10984,"Enclosure":10853,"-40 to 600 °C standard; 800–1300 °C configurations optional":10985,"0–2, 10, 20, 50, 100, 500, 1000 or 2000 ppm or mg\u002Fm³; gas-to-range selection requires project confirmation":10986,"Differential ultraviolet absorption spectroscopy":10987,"Documented measurement scope":10988,"Documented range options":10989,"Front view of the Eranntex DOAS-3000 online CEMS differential optical absorption spectrometer gas analyzer cabinet featuring a clear glass observation door and multi-tier monitoring displays.":10990,"Measurement principle":10991,"NO, NO₂, SO₂, NH₃, H₂S, O₃, benzene, toluene and xylene; the document does not assign every listed range to every gas":10992,"Outdoor waterproof cabinet; explosion-protected configuration optional":10993,"Perspective side view of the Eranntex DOAS-3000 online CEMS flue gas analyzer cabinet highlighting the enclosed floor-standing shelter, side ventilation louvers, and glass inspection window.":10994},"4–20 mA、RS485 和多路无源触点；无线或网络传输选配","标准 -40 至 600 °C；可选 800–1300 °C 配置","0–2、10、20、50、100、500、1000 或 2000 ppm 或 mg\u002Fm³；各气体对应的量程需按项目确认","差分紫外吸收光谱法","资料记载的测量范围","资料记载的量程选项","逸云天 DOAS-3000 在线 CEMS 差分光学吸收光谱气体分析仪机柜正面视图，可见透明玻璃观察门和多层监测显示屏。","测量原理","NO、NO₂、SO₂、NH₃、H₂S、O₃、苯、甲苯和二甲苯；资料未为每种气体指定所列的每个量程","户外防水机柜；防爆配置选配","逸云天 DOAS-3000 在线 CEMS 烟气分析仪机柜侧面透视图，可见封闭式落地机房、侧面通风百叶和玻璃检视窗。",{"market":17,"locale":18,"displayName":10996,"shortDescription":5649},"DOAS-3000 Online Differential UV Gas Analyzer",[],{"id":129,"slug":10999,"modelCode":11000,"productType":10931,"categoryId":113,"samplingMethod":10775,"maxDetectionChannels":1542,"specifications":11001,"resourceIds":11008,"industryIds":11009,"applicationIds":11010,"flexibleAttributes":11011,"minDetectionChannels":10419,"certifications":11033,"certificatePreviewCount":10241,"evidenceScope":23,"evidenceEntries":11034,"media":11039,"marketContent":11042,"supportedDetectionOptions":11058},"doas-2000","DOAS-2000",{"ipRating":10366,"dimensions":11002,"operatingTemperature":11004,"storageCapacity":11007,"samplingMethod":10775},{"unit":10186,"sourceText":11003},"800 × 500 × 340 mm (H × W × D)",{"min":11005,"max":11006},{"value":10781,"unit":10191,"qualifier":9557},{"value":9294,"unit":10191,"qualifier":9557},{"value":10676,"unit":10677,"qualifier":9557},[5610],[],[],[11012,11016,11019,11021,11022,11023,11025,11026,11028,11032],{"key":11013,"label":11014,"value":11015,"group":10207},"measurement-scope","Measurement scope","SO₂ and NO₂ by differential UV absorption spectroscopy; CO by electrochemical sensing",{"key":10950,"label":11017,"value":11018,"group":10207},"Measurement range","0–2000 mg\u002Fm³ for SO₂, NO₂ and CO; other ranges customizable",{"key":10794,"label":10795,"value":11020,"group":10207},"-40 to 600 °C standard; 800 or 1300 °C configurations optional",{"key":10798,"label":10799,"value":10800,"group":10207},{"key":10802,"label":10803,"value":10804,"group":10207},{"key":10806,"label":10807,"value":11024,"group":10207},"4 L\u002Fmin standard; 10 L\u002Fmin optional",{"key":10209,"label":10210,"value":10963,"group":10207},{"key":10812,"label":10813,"value":11027,"group":10207},"Windowless cabinet standard; 9-inch touchscreen optional",{"key":11029,"label":11030,"value":11031,"group":10207},"printer","Printer","Bluetooth printer optional",{"key":10225,"label":10226,"value":10820,"group":10207},[],[11035,11037],{"id":9408,"kind":10244,"scope":23,"certificateId":9408,"productIds":11036},[],{"id":9407,"kind":10244,"scope":23,"certificateId":9407,"productIds":11038},[],[11040],{"id":9203,"url":9204,"alt":9205,"width":1548,"height":1548,"mimeType":675,"roles":11041},[4172,998,9023],[11043,11056],{"market":323,"locale":324,"displayName":11044,"shortDescription":11045,"masterText":11046},"DOAS-2000 在线差分紫外气体分析仪","采用差分紫外吸收光谱并集成样气处理的自动化在线气体分析仪。",{"Technical":10259,"Power supply":10260,"Signal output":10262,"Display":10846,"30–40 m standard; over 70 m with optional vacuum pump":10847,"Sampling distance":10848,"Sampling flow":10849,"Sampling humidity":10850,"Sampling temperature":10851,"4–20 mA, RS485 and multiple passive contacts; wireless or network transmission optional":10984,"-40 to 600 °C standard; 800 or 1300 °C configurations optional":11047,"0–2000 mg\u002Fm³ for SO₂, NO₂ and CO; other ranges customizable":11048,"4 L\u002Fmin standard; 10 L\u002Fmin optional":11049,"Bluetooth printer optional":11050,"Measurement range":3002,"Measurement scope":11051,"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.":11052,"Printer":11053,"SO₂ and NO₂ by differential UV absorption spectroscopy; CO by electrochemical sensing":11054,"Windowless cabinet standard; 9-inch touchscreen optional":11055},"标准 -40 至 600 °C；可选 800 或 1300 °C 配置","SO₂、NO₂ 和 CO 为 0–2000 mg\u002Fm³；其他量程可定制","标准 4 L\u002Fmin；10 L\u002Fmin 选配","蓝牙打印机选配","测量范围（组分）","逸云天 DOAS-2000 在线紫外差分吸收光谱气体分析仪机柜正面透视图，可见顶部彩色触摸屏和双检修面板。","打印机","SO₂ 和 NO₂ 采用差分紫外吸收光谱法；CO 采用电化学传感","标配无窗机柜；9 英寸触摸屏选配",{"market":17,"locale":18,"displayName":11057,"shortDescription":5626},"DOAS-2000 Online Differential UV Gas 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view of the Eranntex MIC-2000-Ex explosion-proof gas alarm controller with heavy-duty circular flanged door, 3.5-inch color LCD display, external alarm beacon, and bottom cable glands.",[4172,998,9023],[11164,11171],{"market":323,"locale":324,"displayName":11165,"shortDescription":11166,"masterText":11167},"MIC2000-Ex 防爆型气体报警控制器","面向模拟量与 RS485 混合探测器网络的防爆型气体报警控制器。",{"Technical":10259,"Power supply":10260,"records":10261,"Signal output":10262,"Installation":10263,"0–99999; selectable resolution of 1, 0.1, 0.01 or 0.001":10264,"Backup power":10265,"Display accuracy":10266,"Display range and resolution":10267,"Maximum power consumption":10268,"Relay output":10269,"RS485 Modbus standard; 4–20 mA, 4G, 433 MHz, LoRa, Zigbee and Ethernet outputs are optional":10270,"Signal input":10271,"Wall mounted":10272,"24 V, 5 Ah optional":10273,"Four control relay groups plus one common output standard; expanded relay configurations are optional":10274,"1 channel of 4–20 mA input standard; expandable to 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