MGS-250 Infrared Gas Detector

Infrared Gas Detector for Safety Compliance 

• Long-life, proprietary infrared (NDIR) sensor
• Detects CFCs, HFCs, HCFCs and new HFO refrigerants
• Meets ASHRAE 15, EN 378, and CARB RMP requirements
• 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. It meets ASHRAE 15, EN 378*, 
EN 14624* (* A1 Gases only), and CARB RMP compliance requirements. 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, EN 378*, EN 14624* (* A1 Gases only)