Intelligent LPG Safety System with Auto Shut-Off

Description:

The Intelligent LPG Safety System with Auto Shut-Off is a smart safety model built on a 40×50 cm platform, aimed at detecting LPG gas leaks and automatically shutting off the gas supply to prevent accidents. This project uses Arduino Uno as the brain of the system, integrated with a gas sensor that continuously monitors air for LPG leakage.

When a gas leak is detected, the Arduino immediately triggers a buzzer alarm and displays a warning message on a 16×2 LCD with I2C module. Simultaneously, a servo motor is activated to automatically close the gas valve using a connected gas regulator, ensuring safety. A push-on button can be used to simulate reset or manual testing.

All components are mounted on a foam board or sun board, with the power distributed through a dedicated power distribution board for safe operation. This project is ideal for exhibitions focusing on home safety, smart kitchens, and automation.

⚙️ Working Mechanism:

1. Detection Phase:
   • The gas sensor constantly monitors air for the presence of LPG gas.
   • When gas concentration crosses a safety threshold, it sends an analog/digital signal to the Arduino Uno.
2. Alert Phase:
   • The Arduino processes the signal and activates the buzzer to alert people nearby.
   • A warning message (e.g., “GAS LEAK DETECTED!”) is displayed on the LCD module.
3. Shut-Off Phase:
   • The Arduino sends a signal to the servo motor, which rotates to close the gas regulator valve, simulating auto shut-off.
   • The system remains in alert mode until manually reset using the push-on button.

✅ Key Highlights:

• Real-time gas leak detection using a gas sensor
• Automatic shut-off using servo motor and regulator
• Visual and sound alert system via LCD and buzzer
• Arduino-based automation for enhanced kitchen safety

🧩 Applications in Real Life:

• Domestic kitchens for gas safety
• Hotels and restaurants
• Industrial gas cylinder storage
• Smart home safety systems