The MQ-3 Alcohol Gas Sensor Module is specifically designed to detect ethanol (alcohol) vapors in the air. It is widely used in breath analyzer devices and alcohol detection systems due to its high sensitivity to alcohol and low sensitivity to other gases.

This module provides both analog and digital outputs, allowing precise measurement of alcohol concentration as well as threshold-based detection. The onboard potentiometer enables users to adjust sensitivity according to application requirements.

Compatible with Arduino, Raspberry Pi, and other microcontrollers, the MQ-3 sensor is easy to integrate into embedded systems and IoT projects. It is commonly used in safety systems, industrial monitoring, and DIY electronics.