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Catalog : Arduino, Pi, Microcontrollers, 3D Printing and Kits : Arduino, Raspberry Pi and Microcontrollers : Arduino Sensors

Alcohol Gas Sensor MQ-3

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Alcohol Gas Sensor MQ-3

SKU: SF-SEN-08880

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This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration. The drive circuit is very simple, all it needs is one resistor. A simple interface could be a 0-3.3V ADC.


  • 5V DC or AC circuit
  • Requires heater voltage
  • Operation Temperature: -10 to 70 degrees C
  • Heater consumption: less than 750mW
  • 16.8mm diameter, 9.3mm height (w/o pins)

US$ 6.72 price
US$ 6.38 5 - 9 (5% Off)
US$ 6.05 10 + (10% Off)