MQ-2 Smoke Gas Sensor Module

The MQ-2 Smoke Gas Sensor Module is a highly sensitive gas detection sensor designed to detect smoke, LPG, propane, hydrogen, methane, and other combustible gases. It is widely used in safety systems, gas leakage detection, and air quality monitoring projects. The module provides both analog and digital outputs, making it easy to interface with Arduino, ESP8266, ESP32, Raspberry Pi, and other microcontrollers.

Features

• Detects smoke, LPG, propane, methane, hydrogen, and alcohol gases
• High sensitivity and fast response time
• Dual output: analog (A0) and digital (D0) signals
• Adjustable sensitivity using onboard potentiometer
• Stable performance in various environments
• Easy integration with microcontroller platforms
• Preheating required for accurate readings
• Low cost and widely used in safety applications

Specifications

• Model: MQ-2 Gas Sensor Module
• Operating Voltage: 5V DC
• Detection Gases: LPG, propane, methane, hydrogen, smoke, alcohol
• Output Type: Analog (A0) and Digital (D0)
• Sensor Type: Semiconductor gas sensor
• Sensitivity Range: 300 ppm to 10,000 ppm (approx.)
• Heating Current: Approx. 150 mA
• Load Resistance: Adjustable via module design
• Warm-up Time: 20–24 hours (initial calibration), few minutes for normal use
• Operating Temperature: -10°C to 50°C
• Compatibility: Arduino, ESP8266, ESP32, Raspberry Pi