How many gases can BTYQ-MS400-S monitor?

The standard configuration monitors one to four gases. Expanded configurations can monitor up to six gases. Specify the target gases and measuring ranges so the requested combination can be checked for sensor compatibility.

How does MS400-S sample gas?

The built-in pump supports remote or probe sampling. The detector can switch to diffusion sampling for ambient monitoring. Include the intended sampling arrangement in the project brief.

Portable Gas Detectors

MS400-S Portable Multigas Detector

BTYQ-MS400-S

Certificates & documents

View all (12)

CertificateZII26080321001

Certificate2026C080-44

CertificateCCRI 26.2595X

CertificateCCRI 25.7406X

CertificateCCRI 25.7405X

CertificateCCRI 25.7404X

CertificateCCRI 25.2158

CertificateCCRI 25.2157X

CertificateCCRI 25.2156X

CertificateCCRI 24.7099X

CertificateCCRI 24.7097X

Certificate2026081801000087

Product overview

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

Pumped and diffusion monitoring in standard and expanded configurations

BTYQ-MS400-S is a portable multigas detector with standard configurations for one to four gases and expanded configurations for up to six gases. It uses a built-in pump for remote or probe sampling and can be switched to diffusion sampling for ambient monitoring. Each requested gas and range combination requires confirmation.

Plug-in digital sensor modules, a 2.4-inch color display, Type-C charging and communication, and data storage support field measurement and record review. Wireless communication, positioning and other connected functions are configuration options that must be specified for the project.

Sampling method: Pump
Ingress protection: IP68
Operating temperature: -20 °C to 55 °C

Request a Quote View specifications

Technical specifications

Confirmed technical specifications
Ingress protection	IP68
Dimensions	147 × 83 × 50 mm (maximum L × W × H)
Weight	Approx. 430 g
Battery voltage	7.4 V
Battery capacity	2,700 mAh
Battery runtime	> 20 h — Pump operation; documented runtime exceeds 20 hours.
Operating temperature	-20 °C to 55 °C
Display size	2.4 in
Data storage	> 1,000,000 records
Alarm volume	> 95 dB — At 30 cm.
Sampling method	Pump

Standard gas configuration: 1–4 gases
Expanded gas configuration: Up to 6 gases
Sampling modes: Built-in pump; switchable to diffusion
Typical accuracy: ≤ ±3% FS; higher-accuracy sensor option available
Response time: T90 ≤ 20 s (general)
Recovery time: ≤ 30 s (general)
Operating humidity: 10–95% RH
Explosion protection: Ex ia IIC T4 Ga
Standard accessories: T-fitting, filter, 0.2 m gooseneck sampling probe, instructions, conformity document, USB charger and data cable, carrying case

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

Measuring range0–100 %Vol

Resolution0 %Vol

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

Measuring range0–1,000 ppm

Resolution1 ppm

Add Combustible Gas · EX 0–1,000 ppm to request

Gas

Oxygen · O₂

Measuring range0–30 %Vol

Resolution0 %Vol

Add Oxygen · O₂ 0–30 %Vol to request

Measuring range0–100 %Vol

Resolution0 %Vol

Add Oxygen · O₂ 0–100 %Vol to request

Gas

Carbon Monoxide · CO

Measuring range0–100 ppm

Resolution0 ppm

Add Carbon Monoxide · CO 0–100 ppm to request

Measuring range0–1,000 ppm

Resolution0 ppm

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

Measuring range0–2,000 ppm

Resolution1 ppm

Add Carbon Monoxide · CO 0–2,000 ppm to request

Measuring range0–5,000 ppm

Resolution1 ppm

Add Carbon Monoxide · CO 0–5,000 ppm to request

Measuring range0–10,000 ppm

Resolution1 ppm

Add Carbon Monoxide · CO 0–10,000 ppm to request

Gas

Hydrogen Sulfide · H₂S

Measuring range0–10 ppm

Resolution0 ppm

Add Hydrogen Sulfide · H₂S 0–10 ppm to request

Measuring range0–100 ppm

Resolution0 ppm

Add Hydrogen Sulfide · H₂S 0–100 ppm to request

Measuring range0–500 ppm

Resolution0 ppm

Add Hydrogen Sulfide · H₂S 0–500 ppm to request

Measuring range0–2,000 ppm

Resolution1 ppm

Add Hydrogen Sulfide · H₂S 0–2,000 ppm to request

4 of 50 gases shown · 121 gas/range options

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

Read all 121 documented gas and measuring-range options

Gas

Hydrogen Sulfide · H₂S

Measuring range0–10 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–500 ppm

Resolution0 ppm

Measuring range0–2,000 ppm

Resolution1 ppm

Gas

Carbon Monoxide · CO

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–1,000 ppm

Resolution0 ppm

Measuring range0–2,000 ppm

Resolution1 ppm

Measuring range0–5,000 ppm

Resolution1 ppm

Measuring range0–10,000 ppm

Resolution1 ppm

Gas

Oxygen · O₂

Measuring range0–30 %Vol

Resolution0 %Vol

Measuring range0–100 %Vol

Resolution0 %Vol

Gas

Methane · CH₄

Measuring range0–100 %LEL

Resolution0 %LEL

Measuring range0–100 %Vol

Resolution0 %Vol

Gas

Carbon Dioxide · CO₂

Measuring range0–5 %Vol

Resolution0 %Vol

Measuring range0–20 %Vol

Resolution0 %Vol

Measuring range0–100 %Vol

Resolution0 %Vol

Measuring range0–5,000 ppm

Resolution1 ppm

Measuring range0–50,000 ppm

Resolution1 ppm

Gas

Ammonia · NH₃

Measuring range0–100 %LEL

Resolution0 %LEL

Measuring range0–10 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–1,000 ppm

Resolution0 ppm

Measuring range0–5,000 ppm

Resolution1 ppm

Gas

Chlorine · Cl₂

Measuring range0–20 ppm

Resolution0 ppm

Measuring range0–200 ppm

Resolution0 ppm

Gas

Sulfur Dioxide · SO₂

Measuring range0–20 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–1,000 ppm

Resolution0 ppm

Measuring range0–5,000 ppm

Resolution1 ppm

Gas

Nitric Oxide · NO

Measuring range0–20 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–1,000 ppm

Resolution0 ppm

Measuring range0–5,000 ppm

Resolution1 ppm

Gas

Nitrogen Dioxide · NO₂

Measuring range0–20 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–1,000 ppm

Resolution0 ppm

Measuring range0–2,000 ppm

Resolution1 ppm

Gas

Hydrogen · H₂

Measuring range0–100 %LEL

Resolution0 %LEL

Measuring range0–100 %Vol

Resolution0 %Vol

Measuring range0–1,000 ppm

Resolution0 ppm

Measuring range0–20,000 ppm

Resolution1 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

Resolution1 ppm

Measuring range0–10,000 ppm

Resolution1 ppm

Gas

Hydrogen Cyanide · HCN

Measuring range0–30 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Gas

Hydrogen Chloride · HCl

Measuring range0–20 ppm

Resolution0 ppm

Measuring range0–200 ppm

Resolution0 ppm

Gas

Phosphine · PH₃

Measuring range0–5 ppm

Resolution0 ppm

Measuring range0–20 ppm

Resolution0 ppm

Measuring range0–2,000 ppm

Resolution1 ppm

Gas

Combustible Gas · EX

Measuring range0–100 %LEL

Resolution0 %LEL

Measuring range0–100 %Vol

Resolution0 %Vol

Measuring range0–1,000 ppm

Resolution1 ppm

Gas

Chlorine Dioxide · ClO₂

Measuring range0–1 ppm

Resolution0 ppm

Measuring range0–10 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Gas

Ethylene Oxide · ETO

Measuring range0–100 %LEL

Resolution0 %LEL

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–1,000 ppm

Resolution0 ppm

Gas

Phosgene · COCl₂

Measuring range0–1 ppm

Resolution0 ppm

Measuring range0–10 ppm

Resolution0 ppm

Gas

Silane · SiH₄

Measuring range0–1 ppm

Resolution0 ppm

Measuring range0–50 ppm

Resolution0 ppm

Gas

Fluorine · F₂

Measuring range0–1 ppm

Resolution0 ppm

Measuring range0–10 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Gas

Hydrogen Fluoride · HF

Measuring range0–10 ppm

Resolution0 ppm

Measuring range0–50 ppm

Resolution0 ppm

Gas

Formaldehyde · CH₂O

Measuring range0–10 ppm

Resolution0 ppm

Measuring range0–50 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–1,000 ppm

Resolution1 ppm

Gas

Hydrogen Bromide · HBr

Measuring range0–50 ppm

Resolution0 ppm

Gas

Diborane · B₂H₆

Measuring range0–10 ppm

Resolution0 ppm

Gas

Arsine · AsH₃

Measuring range0–1 ppm

Resolution0 ppm

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

Measuring range0–2,000 ppm

Resolution1 ppm

Gas

Germane · GeH₄

Measuring range0–1 ppm

Resolution0 ppm

Measuring range0–10 ppm

Resolution0 ppm

Measuring range0–50 ppm

Resolution0 ppm

Gas

Hydrazine · N₂H₄

Measuring range0–1 ppm

Resolution0 ppm

Measuring range0–300 ppm

Resolution0 ppm

Gas

Tetrahydrothiophene · THT

Measuring range0–50 mg/m3

Resolution0 mg/m3

Gas

Bromine · Br₂

Measuring range0–10 ppm

Resolution0 ppm

Measuring range0–50 ppm

Resolution0 ppm

Gas

Acetylene · C₂H₂

Measuring range0–100 %LEL

Resolution0 %LEL

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–1,000 ppm

Resolution1 ppm

Gas

Ethylene · C₂H₄

Measuring range0–10 ppm

Resolution0 ppm

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–1,000 ppm

Resolution1 ppm

Gas

Ethanol · C₂H₆O

Measuring range0–100 %LEL

Resolution0 %LEL

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–2,000 ppm

Resolution1 ppm

Gas

Methanol

Measuring range0–100 %LEL

Resolution0 %LEL

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–2,000 ppm

Resolution1 ppm

Gas

Nitrogen Oxides · NOₓ

Measuring range0–100 ppm

Resolution0 ppm

Measuring range0–500 ppm

Resolution0 ppm

Measuring range0–2,000 ppm

Resolution1 ppm

Gas

Carbon Disulfide · CS₂

Measuring range0–50 ppm

Resolution0 ppm

Gas

Acrylonitrile · C₃H₃N

Measuring range0–100 ppm

Resolution0 ppm

Gas

Nitrous Oxide · N₂O

Measuring range0–1,000 ppm

Resolution1 ppm

Gas

Nitrogen · N₂

Measuring range0–100 %Vol

Resolution0 %Vol

Gas

Benzene · C₆H₆

Measuring range0–200 ppm

Resolution0 ppm

Gas

Toluene · C₇H₈

Measuring range0–200 ppm

Resolution0 ppm

Gas

Xylene · C₈H₁₀

Measuring range0–200 ppm

Resolution0 ppm

Gas

Styrene · C₈H₈

Measuring range0–200 ppm

Resolution0 ppm

Gas

Vinyl Chloride · C₂H₃Cl

Measuring range0–200 ppm

Resolution0 ppm

Gas

Trichloroethylene · C₂HCl₃

Measuring range0–200 ppm

Resolution0 ppm

Gas

Tetrachloroethylene (PID) · C₂Cl₄

Measuring range0–200 ppm

Resolution0 ppm

Gas

Methyl Bromide · CH₃Br

Measuring range0–200 mg/m3

Resolution0 mg/m3

Measuring range0–100 ppm

Resolution0 ppm

Gas

Ethanethiol · C₂H₅SH

Measuring range0–10 mg/m3

Resolution0 mg/m3

Gas

Nitrogen Tetroxide · N₂O₄

Measuring range0–100 ppm

Resolution0 ppm

Communication and product capabilities

Included as standard

Confirmed product-wide interfaces and functions

USB-C
Data logging
SOS emergency call
Man-down alert

Options for technical review

Select requirements for technical confirmation

RS485Optional
Add to request
BluetoothOptional
Add to request
Wi-FiOptional
Add to request
LoRaOptional
Add to request
MESHOptional
Add to request
4GOptional
Add to request
NB-IoTOptional
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) 2026C080-44

2026C080-44

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 26.2595X

CCRI 26.2595X

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 25.7406X

CCRI 25.7406X

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 25.7405X

CCRI 25.7405X

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 25.7404X

CCRI 25.7404X

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 25.2158

CCRI 25.2158

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 25.2157X

CCRI 25.2157X

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 25.2156X

CCRI 25.2156X

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 24.7099X

CCRI 24.7099X

View document

Certificate

China Explosion-Proof Certificate of Conformity CCRI 24.7097X

CCRI 24.7097X

View document

Certificate

China Compulsory Certification (CCC) 2026081801000087

2026081801000087

View document

Downloads

datasheetBTYQ-MS400-S English technical summary

Open PDF

Product questions

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 (10)

BTYQ-MS600-S

MS600-S Portable Multigas Detector

A portable pumped multigas detector with standard one- to seven-gas configurations and expanded eight- or nine-gas configurations. IP68 protection; pump runtime over 24 hours.

Gas configuration: Standard: 1–7 gases; Expansion: 8–9 gases
Sampling: Pump
Ingress: IP68
Data storage: > 1,000,000 records

Discuss your requirements

Selected product

BTYQ-MS400-S

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

Request product information

Tell us about your requirement

Inquiry type

Name

Company

Business email

Country / market

Gas / range requirements

Hydrogen Sulfide · 0–10 ppm

Hydrogen Sulfide · 0–100 ppm

Hydrogen Sulfide · 0–500 ppm

Hydrogen Sulfide · 0–2,000 ppm

Carbon Monoxide · 0–100 ppm

Carbon Monoxide · 0–1,000 ppm

Carbon Monoxide · 0–2,000 ppm

Carbon Monoxide · 0–5,000 ppm

Carbon Monoxide · 0–10,000 ppm

Oxygen · 0–30 %Vol

Oxygen · 0–100 %Vol

Combustible Gas · 0–100 %LEL

Choose up to 6 gases for this product. for other requirements.

Communication and positioning options

USB-C · Standard

RS485 · Optional

Bluetooth · Optional

Wi-Fi · Optional

LoRa · Optional

MESH · Optional

4G · Optional

NB-IoT · Optional

Other gas requirements

Other range requirements

Estimated quantity

Project details

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