Infrared Refrigerant Gas Transmitter


Infrared Refrigerant Gas Detector
  • Long-life, proprietary infrared (NDIR) sensor
  • Detects CFCs, HFCs, HCFCs and new HFO refrigerants
  • No cross interference to other gases, humidity or temperature
  • Modbus RTU interface, analog output, BAS/BMS system connectivity
  • Set all parameters and outputs without opening the unit


     Bacharach's MGS-250 Infrared Refrigerant Gas Detector is the leader in performance and flexibility. It can be configured as either a broadband sensor used for gross leak detection, or as a gas-specific version that’s pre-calibrated and characterized for precision response to individual refrigerants. The MGS-250 is the economical solution for detecting refrigerants without the limitations posed by solid-state sensor technologies.

     Advanced infrared sensing technology makes the MGS-250 immune to cross sensitivities from combustible and toxic gases, as well as changes in temperature and humidity. The infrared sensor provides low-level leak detection and delivers up to 5 to 7 years of virtually maintenance-free operation. The MGS-250 has an alpha-numeric LED display, status indicator, on-board relay, and alarm to alert personnel when levels have exceeded the preset limit.



Type Leak detector using IR sensors
Gases Refrigerants – CFCs, HCFCs, HFCs, HFOs
Measuring Range 0 to 3,500 ppm
Display 4-digit, 7-segment red LED and green status LED
Output Analog 4 to 20 mA, 0 to 5 V, 0 to 10 V, 1 to 5 V, 2 to 10 V
Digital Modbus RTU via RS 485
Power Supply 24 VDC or 24 VAC; 3- or 4-wire
Relay 1 alarm relay, SPDT
Rating 1 A @ 24 VDC, 0.25 A @ 240 VAC, resistive load
Alarm delay 0 to 15 minutes; user-programmable
Ambient Conditions Temperature - 22 to +104 °F (- 30 to +40 °C)
Humidity 5 to 90 %RH, non condensing
Altitude 0 to 10,000 ft (3,050 m)
Enclosure ABS; snap-in cable gland for 0.115 to 0.25” cable
Size (w x h x d) Approx. 4.0” x 5.5” x 1.5” (100 x 140 x 40 mm)
Weight Approx. 6.3 oz (180 g)
Approvals CE, UL, CSA, IEC, EN 61010-1