Gas Sensor Module | Smoke and Combustible Gases |

The MQ-2 Gas Sensor is a widely used module for detecting smoke, LPG, methane, propane, and other combustible gases. It features a sensitive detection range and fast response time, making it suitable for both DIY projects and safety applications.

It outputs both an analog signal (proportional to gas concentration) and a digital signal (threshold detection), which can be easily interfaced with Arduino, ESP8266/ESP32, and other microcontrollers.

Highlights

• Detects: Smoke, LPG, propane, methane, hydrogen, and other combustible gases

• Operating Voltage: 3.3 V – 5 V

• Interface: Analog + Digital output (DO threshold adjustable with onboard potentiometer)

• High sensitivity with fast response and recovery time

• Durable sensor design with long lifespan

💡 Ideal for: Smoke alarms, gas leak detectors, fire prevention systems, and air quality monitoring.