Posted in | Gas Sensors

CM-900: CO2 Industrial Fixed Gas Detector

The CM-900: CO2 Industrial Fixed Gas Detector is designed to provide a gas safety solution for industries requiring measurement of up to 5% carbon dioxide levels to mitigate potential hazards. This device features an IP64 industrial enclosure, specially designed for harsh environments or areas requiring wash-down capabilities.


  • 4-20 mA output to communicate with (BMS) Building Management Systems 
  • Fast and Precise CO2 measurements - monitors 0-5%
  • Users configurable 3-relays dependent upon application
  • Gain instant audible or visual alarms for potential leaks
  • Meets all NFPA, IFC, and NBIC CO2 Safety Code Requirements
  • 1-year warranty


  • O2 Industrial Gas Detector (CM-902)
  • CO2 Industrial Gas Detector (CM-900)


  • Accuracy: +/-200ppm or +/-10% reading 
  • Alarms: 5,000 ppm TWA, 5,000 ppm, 3% CO2 (configurable)
  • Alarm Relays: 3
  • Alarm Response Time: < 60 seconds
  • CO2 Measurement Range: 0-5% (50,000 ppm) 
  • Calibration: Manual with test gas or factory calibration
  • Dimensions: 8.25 in x 6.25 in x 3 in
  • Display Resolution: 10ppm at 0~10,000 ppm
  • Pressure Dependence: built-in barometer (50 to 110 kPa)
  • Response Time: CO2: <2 minutes by 90% 
  • Sound Alarm: 80 db@10 cm 
  • Operating Temperature: 32 °F to 122 °F (0 °C to 50 °C)
  • Warm-Up Time: <60 seconds at 22 °C 
  • Weight: 1.5 lbs (monitor only)
  • Sensor Life Expectancy: >15 years


  • Power Input: 9~32 VDC (12~24 VDC recommended), 2 A.
  • Power Consumption: 3 Watts
  • Ingress Protection: IP64
  • 6 VDC battery backup connections
  • Relays: Peak Current < 2 A @ 30 VDC or 250 VAC, SPDT
  • Relay Color Coding: 
    • Red & White = Normally Open
    • Blue & White = Normally Closed


  • CM-900-CBL: CO2 Industrial Gas Detector Cable
  • CM-900-CON: CO2 Industrial Gas Detector Connector
  • CM-1029: Industrial Siren Strobe
  • CM-902: O2 Industrial Gas Detector 

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