The EXPEC 2000 greenhouse gas chromatography online continuous monitoring system can be equipped with greenhouse gas specific FID or ECD detectors to detect factors such as CO2, CH4, CO, N2O, and SF6 in ambient air. The sample gas is first passed through a quantitative ring and then separated by a greenhouse gas specific chromatographic column. CH4 enters the FID detection, while CO and CO2 enter the methane conversion furnace successively. Under the action of a nickel catalyst, they are hydrogenated and reduced to CH4 at a high temperature of 42 ° C before being sent to the FID detection; NO and SF6 were separated by a chromatographic column and detected by ECD.