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    Flammable Gas Sensor, 300ppm to 10000ppm

    High-quality gas sensor has good sensitivity to flammable gases and smoke from 300ppm to 10000ppm. This combustible gas sensor has long life, low cost and simple drive circuit, used for household gas leak alarms, industrial combustible gas alarms and portable gas detectors.
    This product has a minimum quantity of 10
    30-day Returns
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    Delivery date: 6-12 days

    Buy a high sensitivity gas sensor to detect flammable gases and smoke from 300ppm to 10000ppm. It can also detect natural gas and other flammable vapors, suitable for different applications in detecting various flammable gases.


    Model ATO-MQ-2
    Product Type Semiconductor Gas Sensor
    Standard Package Bakelite, Metal Cap
    Detect Gas Flammable gas, Smoke
    Detection Concentration 300~10000ppm C3H8
    Standard Circuit Conditions Loop Voltage VC ≤24V DC
    Heating Voltage VH 5.0V±0.1V AC or DC
    Load Resistance RL Adjustable
    Gas Sensor Characteristics Under Standard Test Conditions Heating Resistor RH 29±3Ω (Room Temperature)
    Heating Power Consumption PH ≤950mW
    Sensitivity S RS(in air)/RS (in 2000ppm C3H8)≥5
    The Output Voltage VS 2.5V~4.0V (in 2000ppm C3H8)
    Concentration Slope α ≤0.6 (R3000ppm/R1000ppm C3H8)
    Standard Test Conditions Temperature and Humidity 20℃±2℃, 55%±5%RH
    Standard Test Circuit VC: 5.0V±0.1V, VH: 5.0V±0.1V
    Preheat Time Not Less Than 48h
    Oxygen Concentration 21% (Not less than 18%. Oxygen concentration will affect the initial value, sensitivity and repeatability of the sensor. Please consult when using it under low oxygen concentration.)
    Life 10 Years

    Structural Diagram

    Combustible gas sensor structural diagram

    Circuit Diagram

    Combustible gas sensor circuit diagram

    Tips: What is a combustible gas sensor?

    A combustible gas sensor is a device designed to detect the presence of flammable or combustible gases in the air. These sensors play a crucial role in ensuring safety in various environments where the risk of gas leaks or buildup exists, such as industrial facilities, laboratories, homes, and commercial spaces. The primary function of a combustible gas sensor is to monitor the concentration of gases that can ignite and pose a fire hazard.

    These sensors typically employ various technologies to detect the presence of combustible gases, including catalytic bead, infrared, and semiconductor-based sensors. Catalytic bead sensors rely on the combustion of gases on a heated surface, leading to a change in temperature that is then measured. Infrared sensors detect specific wavelengths of light emitted by gases during their absorption or emission processes. Semiconductor sensors utilize changes in electrical conductivity when exposed to combustible gases.

    Once a combustible gas sensor detects a hazardous concentration, it triggers an alarm or activates safety measures to mitigate potential risks. Timely detection of combustible gases is crucial for preventing explosions, fires, and other dangerous situations. Combustible gas sensors are integral components of gas detection systems, contributing to the overall safety of individuals and the protection of property and the environment.

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