Graphite based sensor for LPG and CO detection

Abstract

One of the top design priorities for gas sensors is developing simple, low-cost, sensitive and reliable sensors to be built in handheld portable devices. The present paper deals with the fabrication technique and sensing mechanism of a novel room temperature sensor for detection and quantification of highly inflammable Liquefied Petroleum Gas (LPG) and Carbon monoxide gas at room temperature. The detection of the presence of LPG and CO gas is based on the fact that the resistance of the sensing material of the device changes drastically when exposed to LPG and CO uniquely. This sensor is highly sensitive, repeatable, cost effective, portable, flexible and water proof; very less response as well as degassing time, simple fabrication technique, requires no extra dopants and can easily measure the leakage of LPG and CO as low as 80 ppm at ambient conditions. The fabricated graphite film sensors for the detection of LPG and CO gas have several advantages over conventional metal oxide sensors such as reduced size, low power consumption, room temperature operation and flexibility.