Intrinsically Safe Combustible Gas Detector


Intrinsically Safe Combustible Gas Detector

The #CGD900 can detect more combustible gases (including hydrocarbons) than competitive units.


Best For:



  • Detects Methane, Propane, Ethane, Butane, Hydrogen, Ethylene, Ethanol, ISO-Butane, Gasoline, Acetylene, Methyl Ether, Ammonia, Hydrogen Sulfide, industrial solvents, Benzene, Alcohols, Acetone, Toluene and Xylene
  • MSHA-approved for use in mines
  • Intrinsically safe (in methane-air only)
  • Numeric LED display of sensitivity
  • Three sensitivity levels
  • Ultra-sensitive to methane gas
  • Heated sensor technology
  • Long-life sensor
  • Unique digital leak size display
  • Automatic calibration
  • Mutable alarm
  • Made in the U.S.A.
  • Specifications


    • Sensitivity: As low as 5ppm (methane)
    • Sensor life: 300+ hours
    • Response time: Instantaneous
    • Warmup time: <10 seconds
    • Calibration: Automatic
    • Probe length: 17 in. (432mm)
    • Weight: 2 lb. (907g)
    • Power source: Four "AA" batteries (included)


    • Leak check vial
    • Batteries
    • Custom hard plastic carrying case
    • 2-year limited warranty


    • 13.75 x 10 x 3.25 in. (349 x 254 x 83mm)


    What types of gas detectors does General carry?

    We carry combustible gas, refrigerant, carbon monoxide, VOC, and formaldehyde detectors.

    What types of gas do the combustible gas detectors detect?

    The combustible gas detectors can detect any type of combustible gas that contains hydrogen. Examples of such gasses are: methane, natural gases, coal gases, hexane, propane, ethane, butane, pentane, ...
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    How often do these meters need to be calibrated? How do you calibrate them?

    We do not have a standard as to when these meters need to be calibrated. In order to calibrate the meter, it needs to be sent to a lab. We do not perform calibrations.

    How long are the sensors good for?

    The lifespan of the sensor depends on the usage and levels of exposure.

    Are there replacement sensors available for the combustible gas detectors?

    We only sell replacement sensors for one model of gas detector, the NGD8800. The part number for the sensor is NGD8800SEN.

    Does General carry an intrinsically safe combustible gas detector?

    The CGD900 is intrinsically safe.

    Prop 65

    ⚠ WARNING: This product can expose you to chemicals including di2-ethylhexylphthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to