Abstract:
A simple, low cost and portable, handheld liquid petroleum gas detector is reported in this paper. This battery powered handheld device is fitted with a MQ2 gas sensor and the output voltage of the sensor varies in accordance to the concentration of the gas in the surrounding. The sensor is connected to a microprocessor to display the output and produce an alarm when gas leakage is detected. The concentration of the gas present in the atmosphere is measured and displayed with a detection limit of 50 ppm. The sensor demonstrated high sensitivity towards gas leakages with response and recovery times of 5 seconds and 8 seconds respectively.
