The MQ-2 Combustible Gas Sensor Module is designed for detecting flammable gases such as LPG, propane, hydrogen, methane, alcohol, and carbon monoxide. It features both analog and digital outputs, allowing precise gas concentration measurement or simple threshold-based detection. Operating at 5V DC with an onboard comparator and adjustable potentiometer, it ensures stable performance and easy integration with Arduino and other microcontrollers. Suitable for gas leakage alarms, air quality monitoring, and safety systems in laboratories, hospitals, and industrial environments.