Auto removing regulator for Liquefied Petroleum Gas Cylinders and Electricity CUT-OFF system at Gas Leakages

LPG fire security systems. In this study, an automated LPG fire security system for domestic gas leakages has been designed and a prototype model is constructed. The proposed system automatically takes preventive measures in case of gas leakage. It includes electronic circuitry for emergency shut OFF and removal of the regulator from commercially available LPG cylinders, a control circuit for switching OFF the power of switches/socket outlets in the nearby area, and a transceiver unit for sending SMS to the corresponding people. It has been designed to operate automatically when LPG concentration reaches 200 PPM, the LPG gas inflammable concentration. LPG concentration is sensed by the gas sensor and fed into the microcontroller. A commercially available gas regulator is modified attaching a spring and a solenoid valve. The spring is compressed when the regulator is ON. Once a gas leakage of appropriate PPM is detected, a pulse is sent to the solenoid valve such that the attached spring gets rest by removing the regulator from the cylinder. At the same time, a warning message will automatically be sent to corresponding users and security personnel through a GSM module attached to the circuit. The circuit is embedded with a rechargeable battery to work in a power outage. Additional gas sensors are installed in electrical switches located near the gas cylinder and kept connected with the microcontroller through a Bluetooth module to cut off power to prevent any spark.