The scope covers supply, installation, testing and commissioning of microprocessor controlled digital chromatograph dissolved gas analyzer with accessories and items to make equipment fully functional to detect incipient fault in transformer of electric Loco. The equipment should be able to determine hydrogen, nitrogen, oxygen, methane, ethane, ethylene, acetylene, carbon mono oxide and carbon di-oxide gases. Gas chromatograph should be capable to detect PPM & Sub PPM gases in transformer oil with respect to RDSO specification No TI/SPC/PSI/GAS-CHR/0060 May 2006 (or latest).