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Bacharach

MGS-250 Refrigerant Gas Detector

A cost-effective solution for compliance with refrigeration safety code

Starting at
$1,016.78USD
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MGS 250 Refrigerant Gas Detector 02760
MGS 250 2

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.

• Long-life, proprietary infrared (NDIR) sensor provides 5-7 years of maintenance-free service while detecting the presence of a target gas down to 20 ppm Minimum Detection Level (MDL)
• Sensor is not prone to false alarms caused by cross-interference from other gases or sudden changes in temperature or humidity
• 4-digit LED display shows real-time concentration readings and makes configuration and self-diagnostics intuitive
• Configurable analog output (4-20mA, 0-5V, 0-10V, 1-5V or 2-10V) and Modbus communications for integration with Bacharach’s MGS-408 controller or third-party BMS / BAS control systems
• User-configurable relay (alarm) may be used to activate external beacons / sounders, ventilation or other countermeasures
• Integrated audible / visual alarms for refrigeration safety compliance – no additional hardware
TypeLeak detector using IR sensors
GasesRefrigerants: CFCs, HCFCs, HFCs, HFOs
Measuring Range0 to 3,500 ppm
Display4-digit, 7-segment red LED and green status LED
OutputAnalog: 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 Supply24 VDC or 24 VAC; 3- or 4-wire
Relay1 alarm relay, SPDT
Rating: 1 A @ 24 VDC, 0.25 A @ 240 VAC, resistive load
Alarm delay: 0 to 15 minutes; user-programmable
Ambient ConditionsTemperature: - 22 to +104 °F (- 30 to +40 °C)
Humidity: 5 to 90 %RH, non condensing
Altitude: 0 to 10,000 ft (3,050 m)
EnclosureABS; 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)
WeightApprox. 6.3 oz (180 g)
ApprovalsCE, UL, CSA, IEC, EN 61010-1
Sensor Channels: 1
Measuring Range: 0 to 3,500 ppm
Sensitivity / Minimum Detection Limit: 10 ppm
Accuracy: +25% (Broadband Sensors) +5% (Gas-specific Sensors)
Resolution: 1 ppm
Enclosure Rating: General Purpose
User Interface: 4-digit, 7-segment red/green LEDs; configuration push buttongs
Power: 24 VDC +20% or 24 VAC +20%, 2.5W
Analog Communications: 4 to 20 mA, 0 to 5 V, 0 to 10 V, 1 to 5 V, 2 to 10 V
Digital Communications: Modbus RTU via RS 485
Operating Voltage: 24 VDC or 24 VAC
Relay Rating: 1 alarm relay, SPDT
Wiring: 1 A @ 24 VDC, 0.25 A @ 240 VAC, resistive load
Alarm: Integrated Audible / Visual Alarm
Ambient Temperature: -22 to 104°F (-30 to 40°C)
Humidity: 5 to 90 %RH, non condensing
Altitude: 0 to 6,560 ft (2,000 m)
Status Indicator: 4-digit, 7-segment red/green LEDs
Buzzer Volume: 80 dB @ 10 cm
Product Dimensions (L×W×H): 4.0” × 5.5” × 1.5” (100 × 140 × 40 mm)
Product Weight: 6.3 oz (180 g)
Sensor Type: NDIR
Expected Sensor Service Life: 5 Years
Approvals: CE, UL, CSA, IEC, EN 61010-1
Warranty: 1 Year
  • Thumbnail of document MGS 250 Datasheet 4900 016 MC 13279
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    MGS 250 Datasheet 4900 016 MC 13279

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  • Thumbnail of document 6490 9000 Rev 5 13280
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    6490 9000 Rev 5 13280

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