MQ-3 Gas Sensor (Benzine/Alcohol)

MQ-3 Gas Sensor (Benzine/Alcohol) Description

The MQ-3 Gas Sensor Module is a highly sensitive gas detection sensor designed primarily for detecting alcohol vapors, benzine, and smoke in the air. It is widely used in breathalyzer projects, air quality monitoring systems, safety devices, and Arduino-based automation applications. The sensor provides both analog and digital outputs, making it easy to interface with microcontrollers such as Arduino, Raspberry Pi, ESP8266, and ESP32.

Featuring adjustable sensitivity through an onboard potentiometer, the MQ-3 sensor offers reliable and stable performance for detecting combustible gases and alcohol concentrations. Its compact design and simple operation make it an excellent choice for DIY electronics, educational projects, and industrial monitoring systems.

Features

• High sensitivity to alcohol vapors and benzine
• Detects smoke and combustible gases
• Analog and digital output signals
• Adjustable sensitivity via onboard potentiometer
• Fast response and recovery time
• Compatible with Arduino, ESP32, ESP8266, Raspberry Pi, and other microcontrollers
• Long service life and stable performance
• Easy-to-use module with power and output indicators

Specifications

• Operating Voltage: 5V DC
• Detection Gas: Alcohol, Benzine, Smoke
• Output Type: Analog (A0) and Digital (D0)
• Digital Output Threshold: Adjustable
• Warm-up Time: Approximately 20 seconds
• Interface: 4 Pins (VCC, GND, A0, D0)
• Operating Temperature: -10°C to +50°C

Applications

• Alcohol detection systems
• Breathalyzer projects
• Gas leakage monitoring
• Air quality monitoring
• Industrial safety equipment
• Smart home automation
• Arduino and IoT projects
• Educational and research applications