Hey readers! I hope you are having a good day. Today, we are learning the basics of another MQ sensor family, the MQ-3. This sensor is designed for the detection of alcoholic gases in the air surrounding it. Gas sensors are widely used in multiple applications, and they provide information to the other components of the circuit. In the air, it can detect the 25-500ppm alcohol gas concentration and is a highly sensitive detector. We are going to study it thoroughly from scratch. Libraries MQ-3 Simulation Libraries Latest library: MQ Gas Sensor Library for Proteus V1.0 (October 2026) Other gas and fire sensors: Gas MQ-2 · MH-Z19B CO2 · PMS5003 · CCS811 · Flame Sensor Helping Tools Serial Monitor Advance : a serial terminal window for the UART of your board Serial Monitor Expert : the serial ...