Bacharach MGS-400 Series Gas Detection

The Bacharach MGS-400 series is a comprehensive and flexible solution for CO2 gas detection, consisting of three main components: CO2 sensors, Controllers and an innovative Mobile App.

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Bacharach MGS-400 Series Gas Detection

Bacharach’s MGS-400 Series Gas Detectors make compliance with refrigeration safety codes (e.g., ASHRAE 15 and EN 378) simple and easy, saving time and money on equipment and installation.

Using the MGS-400 App (compatible with Android and iOS), users can intuitively use, commission and maintain their gas detection system without the need for specialty training or tools. Pre-calibrated sensor modules simplify maintenance, take minutes to exchange, and do not require the use of calibration gas.

MGS-400 Series Gas Detectors allow installers to daisy-chain power (24V DC) and Modbus communication cables across the system, and can be easily integrated into a BMS / BAS, or with Bacharach’s optional MGS-408 Gas Detection Controller.

Refrigeration Safety Compliance has never been more intuitive

Bacharach provides innovative solutions designed for extreme temperature refrigeration environments, helping you reduce your Carbon Dioxide refrigerant emissions for Safety Compliance. Suitable for: Machinery Rooms, Walk-in Freezers & Cold Rooms, Industrial Cold Storage, Chiller Rooms.

All Gas Detectors Include:

  • Network Enabled Refrigerant Detection System
  • Integrated Audio-Visual Alarms
  • Multiple Cable Glands
  • Easy to Wire
  • Low Temperature Performance
  • Refrigerant Specific Sensors
  • IP66-rated protection with optional IP41 also available

Gases and Ranges

Refrigerants 1,000 ppm
CO2 5,000 / 10,000 / 20,000 / 30,000 / 40,000 / 50,000 ppm
NH3 100 / 1,000 / 5,000 ppm / 100% LEL
O2 30 Vol%
CO 500 / 1,000 ppm
Combustible Gases – Semiconductor (R-290, R-600, CH4, R-600a, HC-12a, R-717) 5,000 ppm
Combustible Gases – Catalytics (R-600, CH4, R-290, NH3 100% LEL
NO2 20 ppm


Ambient Conditions

Temperature Semiconductor -40 to 122 °F / -40 to 50 °C
Electrochemical NH3 100 / 1,000 ppm: -40 to 40 °C
NH3 5,000 ppm: -20 to 40 °C
CO 500 ppm: -40 to 50 °C
NO2 20 ppm: -20 to 40 °C
O2 30% Volume: -20 to 50 °C
Humidity 5 to 90% RH, non-condensing
Pressure 23.6 to 32.5 inch Hg / 800 to 1,100 mbar


Technical Specifications

Status Indicator Tri-color LED (green, red, orange)
Buzzer 72dB @ 10 cm
Approvals CE, UL / CSA / IEC EN 61010-1

Mobile App User Interface

Quick, easy and intuitive commissioning, configuration and maintenance requires no special training. No tools required to set alarm levels and behavior. The innovative and intuitive app makes compliance with safety standards easy and effective for your Carbon Dioxide gas detection application.

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