MQ-2 Gas Sensor Module | Smoke, LPG, Propane, Methane & Hydrogen Detector for Arduino & ESP32

The MQ-2 Gas Sensor Module is a versatile gas detection sensor designed to detect LPG (Liquefied Petroleum Gas), Propane, Methane, Hydrogen, Smoke, and other combustible gases. It provides both analog and digital outputs, making it easy to interface with Arduino, ESP32, ESP8266, Raspberry Pi (with ADC), STM32, and other microcontroller platforms.

Equipped with an onboard LM393 comparator and an adjustable sensitivity potentiometer, the MQ-2 sensor is ideal for gas leak alarms, smoke detection systems, home safety, industrial monitoring, and IoT-based environmental monitoring projects.

Features

• Detects LPG, Propane, Methane, Hydrogen, and Smoke
• High sensitivity to combustible gases
• Analog and digital output signals
• Adjustable detection threshold via onboard potentiometer
• Fast response and recovery time
• Onboard power and output indicator LEDs
• Compatible with Arduino, ESP32, ESP8266, Raspberry Pi (with ADC), STM32, and other microcontrollers
• Easy-to-use 4-pin interface

Specifications

Applications

• Gas Leak Detection
• Smoke Detection
• LPG Monitoring
• Smart Home Safety Systems
• Fire Alarm Projects
• Industrial Gas Monitoring
• IoT Environmental Monitoring
• Robotics
• DIY Electronics
• Educational Projects