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Alcohol click - MikroElektronika MQ-3 Semiconductor Sensor

  • $19.00
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  • Alcohol click - MikroElektronika MQ-3 Semiconductor Sensor

    Alcohol click has a high sensitivity to alcohol and it can be used to detect alcohol in concentrations from 0.04 to 4mg/l.

    Alcohol click carries an MQ-3 Semiconductor sensor for alcohol. The click is designed to run on a 5V power supply only. It communicates with the target microcontroller through the AN pin on the mikroBUS™ line. 

    MQ-3 sensor features

    The gas sensing layer on the sensor unit is made of Tin dioxide (SnO2), an inorganic compound which has lower conductivity in clean air. The conductivity increases as the levels of alcohol gas rise.

    Calibrating the sensor

    To calibrate the sensor for the environment you’ll be using it in, Alcohol click has a small potentiometer that allows you to adjust the Load Resistance of the sensor circuit.

    Key features

    • MQ-3 sensor
      • Concentration: 0.04-4mg/l alcohol
      • Sensitivity: Rs(in air)/Rs(0.4mg/L Alcohol)≥5
    • Interface: Analog
    • 5V power supply


    Type Gas
    Applications Portable alcohol detector, a breathalyzer for estimating BAC (blood alcohol content)
    On-board modules MQ-3 Semiconductor sensor for alcohol
    Key Features Designed to use a 5V power supply
    Key Benefits Potentiometer for calibration
    Interface Analog
    Input Voltage 3.3V or 5V
    Compatibility mikroBUS
    Click board size M (42.9 x 25.4 mm)


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