Ms400-S Versatile Gas Detector for Electrochemical, Infrared, and Pid-Based Detection in Firefighting, Rescue, and Occupational Health Scenarios

Ms400-S Versatile Gas Detector for Electrochemical, Infrared, and Pid-Based Detection in Firefighting, Rescue, and Occupational Health Scenarios

MS400-S Portable Multi-Gas Detector

The MS400-S is a portable multi-gas detection device designed for fast and reliable identification of gas leaks and hazardous concentrations. It supports up to four digital sensors within a single modular unit, each automatically recognized and easily replaceable via plug-and-play design. The detector utilizes a variety of sensing technologies including electrochemical, infrared (IR), catalytic combustion, thermal conductivity, and PID photoionization to accommodate different gas types and detection needs. Engineered for use in demanding environments, the MS400-S is widely applied in firefighting, emergency response, confined space entry, oil and gas industries, chemical processing, metallurgy, refining, warehousing, pharmaceuticals, environmental monitoring, air quality management, and more.

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Model	MS400-S
Measuring range	Depends on site environment and user requirements
Resolution	0.001ppm (0-10ppm high precision) / 0.01ppm (0~10 ppm); 0.01ppm (0~100 ppm), 0.1ppm (0~1000 ppm), 1ppm (0~ 1 000 ppm or more); 0.1%LEL; 0.1 % , 0.01 % Vol
Unit Display	Optional units: umol/mol, ppm, pphm, ppb , mg/m3, ug/m3, % Vol , %LEL
Response time	T90≤ 2 0 seconds ( general purpose )
Working power supply	DC 7.4V
Display Mode	2.31 inch color LCD
Service environment	-20 ºC~+ 50 ºC , can be customized -40 ºC ~+70ºC ; Relative humidity: 10-95 % RH
Communication interface	Standard Type-C (full charge in 4 hours)
Data storage	Standard capacity is greater than 200,000 records ; supports local viewing, deletion or data export, and storage time interval can be set arbitrarily
Interface language	Record the calibration log, maintenance log, fault record, sensor life expiration reminder, and the next concentration calibration time reminder function
Interface language	Chinese, English and other languages can be customized
Explosion-proof type	Intrinsically safe Exia2 CT4Ga
levels of protection	IP68
Shell material	High-strength, corrosion-resistant and fire-resistant polycarbonate and integrated TPE protective cover, anti-fall, wear-resistant and anti-static, effective against drops ≥ 3 meters
Dimensions	Maximum size 148 * 85 * 50 mm (L*W*H) shell size, excluding back clip thickness
Detection method	Built-in pump suction + diffusion
Repeatability	≤± 2 %
Battery capacity	7.4V, 3000mA h rechargeable polymer battery with overcharge, over discharge, over voltage, short circuit and overheat protection functions
weight	About 280g

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Application Areas
The MS400-S is designed for use in a wide range of environments where reliable multi-gas monitoring is critical. Typical applications include:

• Firefighting and emergency response – for rapid detection of hazardous gases during rescue operations

• Confined spaces – such as tanks, tunnels, and sewers, to ensure worker safety

• Oil and gas industries – including drilling sites, refineries, and distribution facilities

• Chemical and petrochemical plants – for process safety and leak detection

• Metallurgy and refining operations – where gas monitoring is essential for operational safety

• Pharmaceuticals and medical sectors – in cleanrooms, storage areas, and production lines

• Warehousing and logistics – especially for the handling of flammable or toxic substances

• Environmental protection and air treatment – for industrial emissions monitoring and ambient air quality control

Its versatility, durability, and precise detection capabilities make the MS400-S a trusted tool across both industrial and emergency applications.