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 IndicationAt-a-glance visualization of whole gas detection system alarm status
Integrates with Gas DetectorsIntegrates 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 DetectorsSaves time and money on electrical installation
Modbus RTU Master to Gas DetectorsGathers full set of gas detector status
Modbus RTU Slave to BMS/BASIntegrates into BMS / BAS or refrigeration controllers
Event logging via SD CardRetains / exports alarm and status history of the gas detection system
Display ScreenDisplays real time data from all gas detectors in the system and offers simple configuration of controller
Audible and Visual AlarmsQuick and easy sensor replacement in the field & reduced downtime (doesn’t require cal. gas)


User InterfaceFront panel push buttons
Relays1 × Fault, 1 × Low Alarm, 1 × High Alarm
Serial Ports1 × RS485 Modbus RTU Slave for BMS / BAS, 1 × RS485 Modbus RTU Master for Gas Detectors
Ambient Temperature Range32 - 113°F (0 - 45°C)
Power100 - 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 Entries2 × M20 / 1/2” conduit (power), 6 × M16 cable glands (signal)
ApprovalsEN 61010-1, CAS C22.2 61010-1, EN 50270, CE, FCC 15 Subpart B


Bacharach MGS-408 Gas Detector Controller


Part NumberDescription
6702-80008-Channel Gas Detection Controller
Parts & Accessories
1100-2307External Strobe (Red Lens)
1100-2308External Strobe (Green Lens)
1100-2309External Strobe (Blue Lens)
1100-2310External Strobe (Yellow Lens)

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