MQ-3 Alcohol Gas Sensor Module (Alcohol Vapor Sensor)

The MQ-3 Alcohol Gas Sensor Module is a semiconductor gas sensor designed to detect alcohol vapors with high sensitivity. It provides both analog and digital outputs, making it easy to interface with Arduino, ESP32, STM32, Raspberry Pi, and other embedded platforms. The module features an onboard LM393 comparator with adjustable sensitivity and is widely used in breath alcohol testers, safety systems, and gas monitoring applications.

Key Features -

• High sensitivity to alcohol vapors

• Dual analog and digital outputs

• Adjustable sensitivity via onboard potentiometer

• Onboard LM393 comparator

• Fast response and recovery time

• Low power consumption

• Power and status LED indicators

• Easy microcontroller interfacing

• Stable and reliable performance

• Suitable for gas monitoring applications

Specifications -

• Product type - Gas Sensor Module

• Sensor type - Semiconductor Gas Sensor

• Target gas - Alcohol Vapor

• Operating voltage - 5V DC

• Output type - Analog and Digital

• Comparator IC - LM393

• Sensitivity adjustment - Onboard Potentiometer

• Preheat time - Required for Stable Readings

• Working current - Low Power

• Board type - Alcohol Gas Sensor Module

Applications -

• Breath alcohol detection

• Alcohol leak detection

• Industrial safety systems

• Air quality monitoring

• Gas detection projects

• Arduino and IoT projects

• Laboratory experiments

• Embedded electronics