Smart LPG gas detection

The Smart LPG Leakage Detection & Automatic Cut-Off System is a low-cost safety prototype designed to detect LPG leakage and respond automatically. An MQ-6 gas sensor continuously monitors the surrounding air for LPG. When the detected gas level exceeds a predefined threshold, the Arduino activates a buzzer and warning LED and commands a servo motor to close a model gas valve, demonstrating automatic gas-supply cut-off. The system aims to provide early detection, immediate warning, and automatic safety response while keeping the prototype affordable and easy to implement.