Combustible Gas Leak Detector

ITEM # NGD8800

Combustible Gas Leak Detector

The #NGD8800 combustible gas leak detector is ideal for checking automotive exhaust and fuel systems, liquid- and gas-fired heating systems, propane tanks, bilgewater, cracked heat exchangers and manholes/sewers.


Best For:



  • Detects Methane, Hydrogen, Iso-Butane, Ethanol, Ethylene, Tetracholoroethylene, Dimethyl Sufide, Toluene, Formaldehyde, Diethyl-Ether, Ethyl-Acetate, Dichloromethane, Ammonia, R-22
  • Multi-color circular bar graph
  • Long, flexible-obedient probe with replaceable #NGD8800SEN semiconductor gas sensor
  • Redundant audible and visual leak size indications
  • Fast warmup
  • Adjustable Hi/Lo sensitivity
  • Auto power off
  • Specifications


    • Sensitivity: Variable; as low as 5ppm (for gasoline)
    • Warmup time: <110 seconds (at 25°C and 60%RH)
    • Probe length: 15.5 in. (395mm)
    • Auto power off: After 10 minutes of inactivity
    • Operating temperature: 32° to 104°F (0° to 40°C) @ <80% RH
    • Weight: 14.5 oz. (410g)
    • Power source: Four "AA" batteries (included)


    • Meter, probe and #NGD8800SEN sensor
    • Leak check vial
    • Batteries
    • Custom hard plastic carrying case
    • 1-year limited warranty


    • 6.8 x 2.6 x 2.2 in. (173 x 66 x 56mm)


    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