Author : Dr. Manoj Priyatham M 1
Date of Publication :13th June 2017
Abstract: LPG gas is supplied in pressurized steel cylinder . As this gas is heavier than air, when it Leaks from a cylinder it flows along floor and tends to settle in low spots such as a basement. This can cause fire or suffocation if not dealt with. Here is a circuit that detects the leakage of LPG gas and alerts the user through audio-visual indication .This LPG gas sensor (MQ6), ideal sensor for use to detect the presence of dangerous liquefied petroleum gas (LPG) and it has high sensitivity to propane, butane, isobutene, natural gas. The sensor can also be used to detect combustible gases, especially methane. This circuit can detect leakages in your home, car or in a service station, storage tank environment. This unit can be easily implemented to industrial level by upgrading its range. This project is designed to detect the LPG from 200 parts per million (PPM) to 10000(PPM). Whenever there is LPG concentration of 100ppm in the area, the OUT pin of the sensor module goes high .This signal drives timer IC555, which is wired as an a stable multi vibrator .The multi vibrator basically works as a tone generator .This LPG gas sensor can be used to make wireless gas leak detection in home security system .The LPG Gas Sensor Module is designed to enable LPG detection interface to microcontroller without ADC Channels. By providing a GSM modem we can receive “SMS ALERTS†also.
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