Combustible Gas Leak Detector for Extreme Environments


Combustible Gas Leak Detector for Extreme Environments

The #NGD268 combustible gas detector works from -40° to 158°F. That suits it for demanding applications such as mining and tunnel construction.

This item has been discontinued. Please visit the NGD269 for the replacement model.

Best For:



  • Detects Methane, Natural Gas, Coal Gases, Hexane, Propane, Ethane, Butane, Pentane, Isopropyl Alcohol, Halogenated Hydrocarbons (Methanol, Ethanol, Butanol), Ether, Ketones (Butone, Protone), Hydrogen, Toluene, Gasoline, Industrial Solvents, Lacquers, Ref
  • Fast response
  • Long, flexible gooseneck probe
  • Adjustable sensitivity
  • 30-level light/tricolor LED indication
  • Automatically detects sensor fault
  • Specifications


    • Sensitivity: <50ppm
    • Warmup time: 20 seconds
    • Response time: <10 seconds
    • Alarm levels: 20% LEL (Lower Explosive Limit) and 50% LEL
    • Battery charging time: 4 to 6 hours
    • Operating temperature: -40° to 158°F (-40° to 70°C) @<90% RH
    • Weight: 12.4 oz. (350g)
    • Power source: 4.8V/1600mAh rechargeable nickel-hydrogen battery (included)


    • Battery
    • AC adaptor/battery charger
    • 1-year limited warranty


    • 6.7 x 2.4 x 1 in. (170 x 62 x 26mm)


    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, ...
    Read more

    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