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    Portable Methane (CH4) Gas Detector, 0 to 100% Vol

    5 out of 5 based on 2 reviews | Write a review
    Portable Methane (CH4) gas detector, equipped with infrared methane gas sensor, built-in sampling pump, 0 to 100% Vol measuring range, sound, light and vibration alarm, long life time, fast detection and high accuracy.
    SKU: GD200-CH4
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    Portable Methane (CH4) gas detector comes with infrared mathene sensor, built-in micro pump and measuring range 0-100% VOL, fast response and accurate measurement, long service life and favorable price.


    • LCD dot matrix display, direct readout of gas type, unit, concentration, local time, etc.
    • Support English/Chinese operation, easy to shift.
    • Gas concentration unit PPM and mg/m3 can be shift quickly.
    • Built-in micro-sampling pump, 10 grades of suction are available.
    • Explosion-proof certification

    Gas Detector Functions

    • With self-calibration and zero calibration functions, makes the detection more accurate and reliable.
    • One key to restore factory setting, free from maloperation.
    • With temperature and pressure compensation, able to realize the compensation for the gas concentration under different temperature and pressure environments.
    • Two-stage alarm with sound and light, and alarm point is settable.
    • Rechargeable lithiumpolymer battery with large capacity.
    • High-strength special engineering plastic housing, with anti-slip, waterproof, dustproof and explosion-proof


    Model GD200-CH4
    Sampling Method Pumping suction, flow rate can be up to 750ml/min
    Detection Principle Infrared
    Gas Methane (CH4)
    Range (Optional) 0-100% LEL, 0-50% VOL, 0-100% VOL
    Resolution 1% LEL (0-100% LEL), 0.01% VOL (0-50% VOL, 0-100% VOL)
    Accuracy ≤±3% F.S.
    Responce Time ≤10s
    Repeatability ≤±1%
    Recovery Time ≤10s
    Linearity Error ≤±1%
    Zero Shift ≤±1% (F.S./year)
    Data Logging (Optional Function) High speed data transmission by USB, available for data downloading and printing (The built-in IC card has about 2G memory, which can record 100,000 sets of data.)
    Alarms Sound, light and vibration
    Display LCD dot matrix display
    Language Chinese/English
    Battery 3.7V rechargeable lithium battery, 3.7 Watt
    (Charger included: Input AC 100-240V 50/60Hz with optional USA, Europe or UK plug)
    Operating Time 100h (Pump off)
    Communication Mini USB interface supports standard MODBUS communication protocol
    Explosion-proof Grade Ex ia llC T4
    Case Material ABS+PC
    Protection Grade IP66
    Certification CE, ATEX
    Operating Temperature -20℃~50℃
    Operating Humidity 0~95%RH (non-condensing)
    Operating Pressure 0.8~1.2bar
    Dimension 205*75*32mm
    Weight 300g
    Warranty 12 months

    * If you need a CH4 gas detector with other measuring ranges unlisted in above table, please contact us to inform your operating environment, so as to help you choose an appropriate one for your application.
    * We also provide other common gas detectors, and you can refer to ATO Gas Detector Catalog to get the specific gas type and measurement range. If you have any questions, please feel free to contact us.


    Portable Methane (CH4) Gas Detector Details


    Portable Methane gas detector, pump-suction type, adopts infrared methane gas sensor for CH4 concentration detection and it's widely applied in gas station, gas pipeline leak detection, Methane pipeline purity measurement, laboratories or some confined spaces, etc.

    Portable Methane CH4 Gas Detector Applications

    Tips: To prevent mine gas explosion, why only detect methane?

    Methane is an organic compound with a molecular formula of CH₄ and a molecular weight of 16.043. It is the main component of natural gas, biogas, pit gas or mine gas, etc. Methane is a flammable gas, and it is extremely explosive after being ignited. Therefore, it is necessary to install flammable gas alarms and fire-fighting equipment to detect the gas composition and concentration in the environment at any time, such as methane in a mine.

    The composition of mine gas is very complex. Its important component is methane (CH4), followed by carbon dioxide (CO2) and nitrogen (N2). It also contains a small or trace amount of heavy hydrocarbon gases (ethane, propane, butane, pentane, etc.), Hydrogen (H2), Carbon Monoxide (CO), Sulfur Dioxide (SO2), Sulfurizer (H2S), etc.

    Among the gas components of mine gas, only methane gas will explode after exceeding the lower explosion limit, and other gases such as CO and H2S are toxic gases, which will only harm the human body and will not explode. Gases such as CO2N2 are inert gases and usually only affect the oxygen content. Therefore, in terms of preventing explosion hazards, detecting methane is sufficient. The portable methane detector can detect the methane concentration in the environment in real time, and the detector will give the sound and light alarm when the concentration exceeds the standard.The combustible gas detector also need be installed in a working environment where combustible gas is easy to produce and leak so as to control the risk within a controllable and safe range. Other gas types and concentrations can also be measured with corresponding detectors.

    Basic Settings of Portable Gas Detector

    This video will show you the basic settings of ATO portable gas detectors including high/low alarm setting, language setting and time setting.

    Calibration of Portable Gas Detector

    This video will show how to calibrate the ATO portable gas detectors.

    Calibration of Fixed Type Gas Detector

    This video will show the calibration procedures of the ATO fixed type gas detectors.

    Existing reviews of Portable Methane (CH4) Gas Detector, 0 to 100% Vol
    This filter is disposable or for how many uses?
    This filter is disposable or for how many uses? We will take measures frequently in the exhaust of manhole in the sewer system of waste waters
    From: jason | Date: 08/11/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    This filter is white and needs to be replaced if it becomes dirty, so whether it needs to be replaced depends on the environment in which it is used.
    I've been looking for a good gas detector, and when I received it, I knew I bought what I wanted. Actually, this detector can detect CH4 gases, and its alarm sound is very loud and also issued when its low battery and I can charge in time.
    From: Deack | Date: 17/09/2021
    Was this review helpful? Yes No (0/0)
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