Portable Gas Detectors

MS104K-S1 Portable Single-Gas Detector

BTYQ-MS104K-S1

Certificates & documents

View all (5)

CertificateZII26080321001

Certificate2025C147-44

CertificateCCRI 24.2939

CertificateCCRI 24.2938

CertificateCCRI 24.2245X

Product overview

A low-power portable diffusion detector for continuous single-gas monitoring.

Low-power single-gas monitoring

BTYQ-MS104K-S1 is a compact portable diffusion detector for one selected gas, with audible, visual and vibration alarms when configured limits are reached. Its low-power, non-rechargeable design has a working time of one to two years with eight hours of use per day.

A 1.7-inch LCD shows readings and alarms. Alarm-event storage and man-down alarming support field use. The gas, measuring range and electrochemical or low-power infrared sensing principle are selected for the application.

Sampling method: Diffusion
Ingress protection: IP68
Operating temperature: -20 °C to 55 °C — Typical operating range.

Request a Quote View specifications

Technical specifications

Confirmed technical specifications
Ingress protection	IP68
Dimensions	87 × 63 × 32 mm (maximum L × W × H)
Weight	Approx. 200 g
Battery voltage	3.6 V
Battery capacity	1,600 mAh
Battery runtime	At least 1 year — Working time is 1–2 years with 8 hours of use per day; non-rechargeable design.
Operating temperature	-20 °C to 55 °C — Typical operating range.
Display size	1.7 in
Sampling method	Diffusion
Alarm volume	> 90 dB — Documented alarm volume exceeds 90 dB at 30 cm.

Standard gas configuration: 1 gas
Expanded gas configuration: No higher gas-count expansion documented
Sensor principles: Electrochemical or low-power infrared, selected by range and application
Sensor life: Electrochemical: 2–3 years; infrared: 5–10 years
Typical measurement accuracy: ≤ ±3% FS; higher-accuracy sensors available
Response time: T90 ≤ 30 s
Recovery time: ≤ 30 s
Operating humidity: 10–95% RH; −40°C to +70°C available as a custom temperature range
Explosion protection: Ex ia IIC T4 Ga
Housing: High-strength, corrosion-resistant, flame-retardant polycarbonate with rubber overmould; drop resistance ≥8 m
Optional accessories: Communication dock with Type-C interface

Supported gas configurations

Review the documented gas and measuring-range options, then request compatibility confirmation for the required configuration.

Gas

Combustible Gas · EX

Measuring range0–100 %LEL

Resolution0 %LEL

Add Combustible Gas · EX 0–100 %LEL to request

Gas

Oxygen · O₂

Measuring range0–30 %Vol

Resolution0 %Vol

Add Oxygen · O₂ 0–30 %Vol to request

Gas

Carbon Monoxide · CO

Measuring range0–1,000 ppm

Resolution0 ppm

Add Carbon Monoxide · CO 0–1,000 ppm to request

Gas

Hydrogen Sulfide · H₂S

Measuring range0–100 ppm

Resolution0 ppm

Add Hydrogen Sulfide · H₂S 0–100 ppm to request

4 of 41 gases shown · 49 gas/range options

For gases not listed in this table, contact technical sales to discuss your requirements.

Read all 49 documented gas and measuring-range options

Gas

Hydrogen Sulfide · H₂S

Measuring range0–100 ppm

Resolution0 ppm

Gas

Carbon Monoxide · CO

Measuring range0–1,000 ppm

Resolution0 ppm

Gas

Oxygen · O₂

Measuring range0–30 %Vol

Resolution0 %Vol

Gas

Methane · CH₄

Measuring range0–100 %LEL

Resolution0 %LEL

Gas

Carbon Dioxide · CO₂

Measuring range0–2 %Vol

Resolution0 %Vol

Measuring range0–5,000 ppm

Resolution1 ppm

Gas

Ammonia · NH₃

Measuring range0–100 ppm

Resolution0 ppm

Gas

Chlorine · Cl₂

Measuring range0–20 ppm

Resolution0 ppm

Gas

Sulfur Dioxide · SO₂

Measuring range0–100 ppm

Resolution0 ppm

Gas

Nitric Oxide · NO

Measuring range0–100 ppm

Resolution0 ppm

Gas

Nitrogen Dioxide · NO₂

Measuring range0–100 ppm

Resolution0 ppm

Gas

Hydrogen · H₂

Measuring range0–1,000 ppm

Resolution0 ppm

Measuring range0–40,000 ppm

Resolution1 ppm

Gas

Volatile Organic Compounds · VOC

Measuring range0–20 ppm

Resolution0 ppm

Measuring range0–200 ppm

Resolution0 ppm

Measuring range0–2,000 ppm

Resolution0 ppm

Gas

Hydrogen Cyanide · HCN

Measuring range0–30 ppm

Resolution0 ppm

Gas

Hydrogen Chloride · HCl

Measuring range0–20 ppm

Resolution0 ppm

Gas

Phosphine · PH₃

Measuring range0–20 ppm

Resolution0 ppm

Gas

Combustible Gas · EX

Measuring range0–100 %LEL

Resolution0 %LEL

Gas

Chlorine Dioxide · ClO₂

Measuring range0–1 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Gas

Ethylene Oxide · ETO

Measuring range0–100 ppm

Resolution0 ppm

Gas

Phosgene · COCl₂

Measuring range0–1 ppm

Resolution0 ppm

Gas

Silane · SiH₄

Measuring range0–1 ppm

Resolution0 ppm

Measuring range0–50 ppm

Resolution0 ppm

Gas

Fluorine · F₂

Measuring range0–10 ppm

Resolution0 ppm

Gas

Hydrogen Fluoride · HF

Measuring range0–50 ppm

Resolution0 ppm

Gas

Formaldehyde · CH₂O

Measuring range0–10 ppm

Resolution0 ppm

Gas

Diborane · B₂H₆

Measuring range0–10 ppm

Resolution0 ppm

Gas

Arsine · AsH₃

Measuring range0–10 ppm

Resolution0 ppm

Gas

Ozone · O₃

Measuring range0–1 ppm

Resolution0 ppm

Measuring range0–10 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Gas

Germane · GeH₄

Measuring range0–10 ppm

Resolution0 ppm

Gas

Hydrazine · N₂H₄

Measuring range0–1 ppm

Resolution0 ppm

Gas

Tetrahydrothiophene · THT

Measuring range0–50 mg/m3

Resolution0 mg/m3

Gas

Acetylene · C₂H₂

Measuring range0–100 ppm

Resolution0 ppm

Gas

Ethylene · C₂H₄

Measuring range0–100 ppm

Resolution0 ppm

Gas

Ethanol · C₂H₆O

Measuring range0–100 ppm

Resolution0 ppm

Gas

Methanol

Measuring range0–100 ppm

Resolution0 ppm

Gas

Carbon Disulfide · CS₂

Measuring range0–50 ppm

Resolution0 ppm

Gas

Acrylonitrile · C₃H₃N

Measuring range0–100 ppm

Resolution0 ppm

Gas

Styrene · C₈H₈

Measuring range0–100 ppm

Resolution0 ppm

Gas

Vinyl Chloride · C₂H₃Cl

Measuring range0–100 ppm

Resolution0 ppm

Gas

Trichloroethylene · C₂HCl₃

Measuring range0–100 ppm

Resolution0 ppm

Gas

Tetrachloroethylene (PID) · C₂Cl₄

Measuring range0–100 ppm

Resolution0 ppm

Gas

Nitrogen Tetroxide · N₂O₄

Measuring range0–100 ppm

Resolution0 ppm

Gas

Propane · C₃H₈

Measuring range0–100 %LEL

Resolution0 %LEL

Communication and product capabilities

Included as standard

Confirmed product-wide interfaces and functions

Man-down alert
Data logging

Options for technical review

Select requirements for technical confirmation

InfraredOptional
Add to request
USB-COptional
Add to request

Certificates & documents

Certificate

Environmental Labeling (Type II) Product Verification Certificate ZII26080321001

ZII26080321001

Status: active · valid to Sep 16, 2027

Type II environmental labeling verification covering the exact product models listed in the certificate attachment.

Issuer: 广东中天认证中心有限公司
applicant: 深圳市逸云天电子有限公司
manufacturer: 深圳市逸云天电子有限公司

Scope: Model BTYQ-MS104K-M is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model BTYQ-MS104K-L is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model BTYQ-MS104K-S1 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model BTYQ-MS104K-S2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model BTYQ-MS400-S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model BTYQ-MS600-S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model BTYQ-MS600-S1 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model BTYQ-MS600-S2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model BTYQ-PTM600-S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model BTYQ-PTM600-S2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model GTYQ-MIC-500S is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model GTYQ-MIC-600 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model MIC-1000 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: The certificate lists MIC-3000; the CMS model code MIC3000 is linked through its governed MIC-3000 source identity. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model MIC-200-UVIR2 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model MIC-200-IR3 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model MIC-200-UVIR3 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model MIC-200-IR4 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

Scope: Model MIC-200-UVIR4 is listed on the certificate attachment. Scope is limited to the Type II environmental labeling claim verified under GB/T 24021-2024 / ISO 14021:2016 and ZTIIPJ01-01-2026.

View document

Certificate

China Type Approval Certificate (CPA) 2025C147-44

2025C147-44

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 24.2939

CCRI 24.2939

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 24.2938

CCRI 24.2938

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 24.2245X

CCRI 24.2245X

View document

Downloads

datasheetBTYQ-MS104K-S1 English technical summary

Open PDF

Compare adjacent models

Certificates & documents (3)

BTYQ-MS104K-L

MS104K-L Portable Single-Gas Detector

A portable pump-sampling gas detector for application-specific single-gas monitoring.

Gas configuration: Standard: 1 gas; Expansion: No higher gas-count expansion documented
Sampling: Pump
Ingress: IP66
Data storage: 100,000 records

Certificates & documents (5)

BTYQ-MS104K-M

MS104K-M Portable Multigas Detector

A portable gas detector with standard configurations for one to four gases and both diffusion and pumped sampling. An external pump is supplied as standard.

Gas configuration: Standard: 1–4 gases; Expansion: Up to 6 gases
Sampling: Diffusion or pump sampling; external pump supplied as standard
Ingress: IP66
Data storage: > 200,000 records

Certificates & documents (12)

BTYQ-MS400-S

MS400-S Portable Multigas Detector

A portable pumped detector with standard one- to four-gas configurations and expanded configurations for up to six gases; switchable to diffusion sampling.

Gas configuration: Standard: 1–4 gases; Expansion: Up to 6 gases
Sampling: Built-in pump; switchable to diffusion
Ingress: IP68
Data storage: > 1,000,000 records

Discuss your requirements

Selected product

BTYQ-MS104K-S1

Select the required gases and measuring ranges, and review the listed communication options. Technical sales will confirm compatibility and the final configuration with you.

Certificates & documents

Product overview

Low-power single-gas monitoring

Included as standard

Options for technical review

Environmental Labeling (Type II) Product Verification Certificate ZII26080321001

China Type Approval Certificate (CPA) 2025C147-44

China Explosion-Proof Certificate of Conformity CCRI 24.2939

China Explosion-Proof Certificate of Conformity CCRI 24.2938

China Explosion-Proof Certificate of Conformity CCRI 24.2245X

MS104K-L Portable Single-Gas Detector

MS104K-M Portable Multigas Detector

MS400-S Portable Multigas Detector

BTYQ-MS104K-S1

Tell us about your requirement