Portable sensor array system for intelligent recognizer of manhole gas

A sensor array consisting of five individual gas sensors (methane, carbon dioxide, carbon monoxide, hydrogen sulfide, ammonia) has been developed for analysis of individual gases from a mixture of various explosive and toxic gases which are commonly available in manhole gas mixture. Manhole gas of different areas has been collected and analyzed in lab by chemical process and gas chromatography. A gas mixture and measurement setup has been developed in lab for analysis of mixed toxic and explosive gases by the sensor array. For cross sensitivity of the sensor array an intelligent system has being developed to find out the actual concentration of gas from a gas mixture.