The oil and gas industries are investing more time and more money in wireless sensor technologies to help reducing risks to personnel and plant by using early-warning devices such as gas detectors. This can help to provide more time to take remedial or protective action. Gas leakage is also concern with residential, commercial premises and gas powered transportation vehicles. This paper provides a means for detecting the leakage of harmful gases and monitoring system which is economical to manufacture and which may be readily installed in service stations, pressure gas storage tank environments, gas yards, utility areas like kitchen, and gas powered vehicles.