MGS-402 Leak Detection System

2-Channel Controller for Refrigerant, Toxic and Combustible Gas Detection

Bacharach’s MGS-402 Controller centralizes the status of two gas detectors to enable compliance with refrigeration safety codes (ASHRAE 15, EN 378, CSA-B52).

  • Designed for operation in refrigeration applications with an IP66-rated enclosure to protect from dust and water ingress (suitable for use in cold rooms and freezers down to -40°C)
  • MGS-410 Gas Detectors may be installed in hard-to-reach / elevated locations (distances up to 305m from the controller)
  • Centralized power and communications for up-to two connected MGS-410 gas detectors
  • Tri-color LED indicators provide “at-a-glance” system / alarm status
  • Two configurable Analog outputs (4-20mA, 0-5V, 0-10V, 1-5V or 2-10V) and Modbus communications (slave) for integration with Bacharach’s MGS-408 controller or third-party BMS / BAS control systems
  • Three user-configurable relays (fault, low and high alarm) may be used to activate external beacons / sounders, ventilation or other countermeasures
  • Integrated audible / visual alarms with push button silence for refrigeration safety compliance – no additional hardware

Product Information

Bacharach’s MGS-402 Gas Detection Controller centralizes the status of up to two gas detectors, provides a complete package for your safety compliance application. On the front panel of the MGS-402 a bank of LEDs corresponds to each connected gas detector; showing power, alarm status and fault indicators. The MGS-402 can provide the power requirements for to up to two gas detectors, which can be daisy-chained with Modbus communication to each gas detector; simplifying and reducing the cost of installation.

The MGS-402 can be integrated with Bacharach’s MGS-410 gas detector; allowing for a flexible gas detection system design which can utilize the benefits of multiple gas detector types as required in different locations (machinery rooms, cold storage rooms, walk-in freezers and food preparation areas).

Product Specifications
Enclosure Rating:IP66
User Interface:Configuration through DIP switches
Power:100 – 240 VAC, 50/60 Hz, 20 W (max.)
Analog Communications:4 to 20 mA, 1 to 5 V, 2 to 10 V
Digital Communications:Modbus RTU via RS 485
Operating Voltage:100 to 240 VAC, 50/60 Hz
Relay Rating:2 Alarm relays, 1 Fault relay SPDT
Wiring:10 A @ 240VAC
Alarm:Integrated Audible / Visual Alarm
Ambient Temperature:-40 to 122°F (-40 to +50°C)
Humidity:5 to 90% RH, non-condensing
Altitude:0 to 6,560 ft (2,000 m)
Status Indicator:Tri-color LED (green, red, orange) – Controller status, channel status
Buzzer Volume:80 dB @ 10 cm
Product Dimensions (L×W×H):6.5” × 6.5” × 3.4” (165 × 165 × 87 mm)
Product Weight:1 lb, 11.07 oz (758 g)
Approvals:CE, UL / CSA / IEC EN 61010-1
Warranty:1 Year
Country of Origin:United States
Accessories and Parts

External Beacon / Sounder (Red Lens)

External Beacon / Sounder (Green Lens)

External Beacon / Sounder (Blue Lens)

External Beacon / Sounder (Yellow Lens)

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Telephone: (+44) 1527 522 299