MQ-2 Gas Sensor, Smoke and Combustible Gas Detection Module for Arduino

The MQ-2 gas sensing module monitors the concentration of combustible gases and smoke indoors. It continuously analyzes air composition and promptly responds to hazardous substances, helping to prevent gas leaks and smoke build-up. The module is widely used in security systems, smart homes, educational projects and DIY builds. Thanks to its simple wiring and compatibility with Arduino, ESP and similar microcontroller platforms, the sensor suits both beginners and experienced developers. The MQ-2 is sensitive to gases such as propane, butane, methane and hydrogen, as well as smoke. The module features analog and digital outputs, allowing flexible configuration of alarm or automatic control systems. Product specifications: Model: MQ-2. Device type: gas sensing module. Purpose: gas and smoke detection and air quality monitoring. Sensor type: semiconductor. Detectable gases: propane, butane, methane, hydrogen, smoke. Outputs: analog (AO), digital (DO). Operating voltage: 5 V. Compatibility: Arduino, ESP8266, ESP32 and other microcontrollers. Applications: security systems, smart home, educational projects, DIY. Operating environment: indoor spaces.