The gas in transformer oil on-line monitoring equipment takes the analysis of dissolved gases to a whole new level, using improved gas chromatography principle detection technology to provide highly reliable, high-precision results without interference from the field environment. It can realize the high-precision measurement of multi-component fault gases (C2H2, CH4, H2, H2O, CO, CO2, C2H6), with its own carrier gas generation system, no other carrier gas cylinders are required during operation, safe and reliable. Can provide RS485 for remote communication, Ethernet two independent channels (GPRS wireless communication optional) communication protocol support MODBUS, MODBUS/TCP.