The gas is delivered in steel cylinders that are pressurized. Because this gas is heavier than air, when it escapes from the cylinder, it travels along the floor and settles in low areas, such as a basement, where it might cause fire or suffocation if not addressed. This project shows how to design and build a gas detection system to deal with gas leak situations. A gas detection system is an electronic device that detects liquefied petroleum gas leaks and notifies the user via an audio signal. A microprocessor, drivers, regulated power supply, warning circuit, and a MQ-6 gas sensor make up the system. The MQ-6 gas sensor detects propane, butane, isobutene, natural gas, and flammable gases, particularly methane, with excellent sensitivity. The project is meant to detect LPG in an area at concentrations ranging from 200 PPM to 10,000 PPM, after which the out pin of the sensor is driven low to trigger a microcontroller that is configured to produce a high frequency warning. The high frequency auditory alert signal is produced by a buzzer, and the device is powered by a 9v battery. This project can be used to detect gas leaks in the home, in a car, in a storage tank, or at a gas station. By upgrading its ranges, it can readily be scaled up to the industrial level. Because many gases can be detrimental to biological life, such as people, the project’s execution is critical in every house, workplace, and industry.

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