Gas Sensors

Alcohol Gas Sensor MQ3

Posted On June 21, 2019 at 11:28 am by / Comments Off on Alcohol Gas Sensor MQ3

Description: This Alcohol Sensor MQ3 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