MQ2 Smoke LPG CO Sensor Module

MQ2 Smoke LPG CO Sensor Module

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  • Product Code: SN-MQ2-MOD
  • Warranty Period: 12 months
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The MQ-2 Gas sensor can detect or measure gasses like LPG, Alcohol, Propane, Hydrogen, CO and even methane. The module version of this sensor comes with a Digital Pin which makes this sensor to operate even without a microcontroller and that comes in handy when you are only trying to detect one particular gas. When it comes to measuring the gas in ppm the analog pin has to be used, the analog pin also TTL driven and works on 5V and hence can be used with most common microcontrollers.

The connection of MQ2 gas sensor to Arduino


    • Built in Power Indicator LED and Low TTL Indicator LED 
    • Operating Voltage is +5V
    • Can be used to Measure or detect LPG, Alcohol, Propane, Hydrogen, CO and even methane
    • Analog output voltage: 0V to 5V
    • Digital Output Voltage: 0V or 5V (TTL Logic)
    • Preheat duration 20 seconds
    • Can be used as a Digital or analog sensor
    • The Sensitivity of Digital pin can be varied using the potentiometer
    • Dimension (mm): 32 (L) x 22 (W) x 27 (H)
    • Weight : 10 g


    • Detects or measure Gases like LPG, Alcohol, Propane, Hydrogen, CO and even methane
    • Air quality monitor
    • Gas leak alarm
    • Safety standard maintenance
    • Maintaining environment standards  in hospitals 

    Packing List:

    • 1 x MQ2 Smoke LPG CO Sensor Module


    If we expose this sensor to gas for a long period of time, will it damage the sensor? ( ZJ, 16/10/2019 )
    Hi! We would advice not to do so as long exposure will affect the performance of the sensor. You may refer to the Datasheet of the product. Thanks :)

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    Tags: MQ2, Arduino compatible