MQ3 Gas Sensor

110.00125.00 (-12%)

In stock


  • High sensitivity to alcohol and small sensitivity to Benzine.
  • Fast response and High sensitivity
  • Stable and long life
  • Simple drive circuit

MQ3 is both digital and analog outputs sensor which is commonly used to detect the presence of alcohol gases. It is a low cost semiconductor type Gas Sensor. It can detect the presence of alcohol gases at concentrations from 0.05 mg/L to 10 mg/L. The output voltage of the gas sensor increases if the concentration of gas increases. The sensitivity of the sensor is adjustable by the Potentiometer. The MQ3 alcohol sensor module is arduino compatible.

The working voltage of MQ3 gas sensor is 5 volt DC and it draws around 750 mW. This sensor is capable of detecting Alcohol, Benzine, CH4, Hexane, LPG, CO.


  • They are suitable for alcohol checker
  • Breathalyser
  • Technical Specifications

    Weight 40.8 g
    Dimensions 32 × 22 × 27 mm
    Main Chip LM393, ZYMQ-3
    Operating Voltage 5V
    Load resistance 200 KΩ
    Heater resistance 33Ω ± 5%
    Heating consumption <750 mW
    Sensing Resistance 1 MΩ – 8 MΩ
    Concentration Scope 0.05mg/L—10mg/L
    Preheat Time Over 24 hour
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