MS400-S Portable Four Gas Industrial Multi Gas Safety Gas Leak Monitoring Alarm Personal Detector

MS400-S Portable 4-Gas Detector

Product Overview

The MS400-S Portable 4-Gas Detector is a professional handheld instrument developed for simultaneous monitoring of up to four gases in industrial and hazardous environments. Its modular sensor architecture allows users to configure 1 to 4 digital sensors according to actual monitoring requirements.

Each sensor module supports automatic recognition after installation, helping simplify sensor replacement and instrument configuration. Depending on the target gas and measurement range, the MS400-S can utilize electrochemical, infrared, catalytic combustion, thermal conductivity or PID photoionization sensing technology.

The detector combines built-in pump sampling and diffusion measurement, allowing operators to perform both personal-area monitoring and active remote sampling with one instrument. Real-time readings are presented on a 2.31-inch color LCD, while large-capacity internal memory supports long-term data recording and subsequent analysis.

With rugged IP68 construction, multiple sensor options, intelligent maintenance reminders and flexible gas combinations, the MS400-S is suitable for daily safety inspection, confined-space monitoring, gas leak surveys and emergency response applications.

Key Features

• Simultaneous measurement of 1 to 4 gases

• Modular digital sensor design

• Plug-and-play sensor installation with automatic identification

• Supports toxic, combustible, oxygen, VOC and other gas measurements

• Multiple sensor technologies available for different gas applications

• Built-in pump suction and diffusion sampling

• External probes available for remote and specialized sampling

• Man-down alarm provides additional protection for field personnel

• 2.31-inch color LCD for clear real-time data display

• Type-C interface for charging and communication

• Internal memory stores more than 200,000 records

• Measurement records can be viewed, deleted or exported

• Adjustable data logging intervals

• PC software available for data transfer and analysis

• Calibration history and maintenance information can be recorded

• Sensor service-life expiration reminder

• Next calibration reminder function

• Fault history recording

• Rechargeable 3000 mAh polymer battery

• Electrical protection against overcharge, over-discharge, overvoltage, short circuit and overheating

• High-strength flame-resistant polycarbonate housing

• Integrated TPE protective structure improves impact resistance

• Resistant to drops of 3 meters or more according to the supplied specification

• IP68 protection against dust and water ingress

• Multiple interface languages available

Sampling Modes

The MS400-S supports two primary gas sampling methods:

Built-in Pump Suction
The internal pump actively draws gas into the instrument, making it suitable for remote sampling, enclosed locations, pipelines and pre-entry gas checks.

Diffusion Detection
Gas naturally reaches the sensors through diffusion, making this mode suitable for continuous personal and ambient monitoring.

This dual-mode design allows the same detector to cover different field inspection requirements without requiring separate instruments.

Typical Applications

The MS400-S can be used for gas detection and personnel protection in:

• Firefighting operations

• Emergency rescue

• Confined-space entry

• Oil and gas facilities

• Petroleum refineries

• Petrochemical plants

• Chemical production

• Metallurgical industries

• Gas transmission and distribution

• Pharmaceutical manufacturing

• Warehousing and storage

• Environmental monitoring

• Industrial air treatment

• Utility maintenance

• Workplace safety inspections

• Hazardous-area gas surveys

Technical Specifications

Detection Technology Options

The MS400-S can be equipped with different sensor principles depending on the target gas:

• Electrochemical sensing – commonly used for toxic gases and oxygen

• Infrared sensing – suitable for compatible combustible and other gases

• Catalytic combustion sensing – commonly applied to combustible gas measurement

• Thermal conductivity sensing – available for suitable high-concentration applications

• PID photoionization – suitable for VOC and other ionizable compound monitoring

The final sensor configuration is selected according to the gas type, required range and operating conditions.

Data and Maintenance Management

In addition to real-time monitoring, the MS400-S provides extensive record management functions.

The instrument can store more than 200,000 measurement records, while logging intervals can be adjusted according to the monitoring task. Stored information can be reviewed directly on the detector or exported for further analysis.

The system also records calibration history, maintenance activities and fault events, helping users track instrument condition over its service life. Sensor expiration reminders and scheduled concentration calibration reminders assist with routine maintenance planning.

Product Advantages

The MS400-S combines modular digital sensors, dual sampling methods, large-capacity data storage and intelligent maintenance management in one portable multi-gas platform.

Its plug-and-play sensor architecture makes the detector especially suitable for users who require different gas combinations across multiple applications, while the built-in sampling pump, IP68 housing and rugged protective structure support reliable operation in demanding industrial environments.