Bacharach MGS-408 Gas Detection Controller

Bacharach MGS-408 Gas Detection Controller centralizes the status of up to 8 gas detection channels in a single location. The digital display provides a real-time view of the gas concentration and status at each gas detection point. It also allows for the controller to be configured in minutes via the intuitive menu system. A bank of LEDs corresponds to each connected gas detector; showing power, alarm status, and fault indicators.

The MGS-408 can provide power for up to 8 gas detectors, which can be daisy-chained along with Modbus communication to each gas detector; simplifying and reducing the cost of installation. Integration is possible with Bacharach’s MGS-400 Series, MGS-250, and MGS-550 Gas Detector platforms; allowing for a gas detection system design that 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).

Combining the MGS-408 with Bacharach’s range of gas detectors provides a single system with an easy means of achieving compliance with refrigeration safety standards such as EN 378 and ASHRAE 15 for safety compliance in refrigeration applications



LED Status Indication

At-a-glance visualization of the whole gas detection system alarm status

Integrates with Gas Detectors

Integrates the MGS-250 MGS-410, MGS-450, MGS-460, and MGS-550; creating a system suitable for applications with
different requirements at multiple monitoring points

Power Gas Detectors

Saves time and money on electrical installation

Modbus RTU Master to Gas Detectors

Gathers full set of gas detector status

Modbus RTU Slave to BMS/BAS

Integrates into BMS / BAS or refrigeration controllers

Event logging via SD Card

Retains / exports alarm and status history of the gas detection system

Display Screen

Displays real-time data from all gas detectors in the system
 and offers a simple configuration of the controller

Audible and Visual Alarms

Quick and easy sensor replacement in the field & reduced downtime
(doesn’t require cal. gas)

Specification :



User Interface

Front panel push buttons


1 × Fault, 1 × Low Alarm, 1 × High Alarm

Serial Ports

1 × RS485 Modbus RTU Slave for BMS / BAS, 1 × RS485 Modbus RTU Master for Gas Detectors

Ambient Temperature Range

32 - 113°F (0 - 45°C)


100 - 240 VAC, 50/60 Hz, 80W (max)

Size (W×H×D) Approx.

11.0” × 8.5” × 3.9” (280 × 215 × 100 mm)

Weight Approx.

2lb, 12.1oz (1250 g)

Cable Entries

2 × M20 / 1/2” conduit (power), 6 × M16 cable glands (signal)


EN 61010-1, CAS C22.2 61010-1, EN 50270, CE, FCC 15 Subpart B

Model :

Part Number



8-Channel Gas Detection Controller

Parts & Accessories


External Strobe (Red Lens)


External Strobe (Green Lens)


External Strobe (Blue Lens)


External Strobe (Yellow Lens)

For further info please contact us,