MQ-2 Gas Detection Module

The gas sensor is an electronic sensing module designed to respond to the presence or concentration changes of certain gases or vapors. It is suitable for Arduino, ESP32, robotics, automation, IoT, and STEM learning projects where a controller needs information about its surroundings or user interaction.

The module can typically be connected to a microcontroller using simple power and signal connections. Its output can be used to trigger LEDs, buzzers, relays, motors, displays, alarms, or software actions depending on the project. It is useful for both beginner experiments and practical prototypes.

This sensor provides a convenient way to add responsive, real-world input to electronic systems without building the sensing circuit completely from individual components.

Features:
• Detects changes in target gas concentration
• Analog/digital output on common modules
• Adjustable sensitivity on typical module boards
• Suitable for gas-leak and air-quality experiments