The newchrom microprocessor controlled gas chromatograph suitable for analysis of dissolved gas for organic and inorganic compounds in transformer oil. It is based on fid and tcd and it has facility of providing h2 on tcd and co, co2, c2h4, ch4, c2h6, c2h2, propane and propylene all on fid. Co and co2 is measured with the help of methanizer, this all process is done with single injection. It is capable to accommodate upto three column. Temperature controller which provide -99 to 400°c contant temperature,also capable to memorize upto 99 method and 9 ramp function, effortless automatic cooling system and have epc controlled(optional) or dfc accurate flow of gases. Audio and visual alarm system is provided in case of any failure in the system. Rs 232 facility is provided for communication with pc.