A gas detection controller for refrigerant, toxic and combustible gas detection applications is designed for safety compliance in cold storage facilities, walk-in freezers and cold room applications to -40°F.

The MGS-402 from Bacharach connects through Modbus to up to two remote MGS-410 gas detectors at up to 1,000’. It is powered by 110-240V AC and provides three 10A output relays (fault, low alarm, high alarm) to initiate auxiliary ventilation or restrict refrigerant flow and two analog outputs for interface to a BMS or fire/safety panel packaged in an IP66 enclosure. Upstream Modbus connectivity enables remote configuration and communication with building management systems.