The instrument adopts special column combination, central cutting and back blowing technology and FID technology to detect methane and non methane total hydrocarbon. After the sample is collected in the quantitative ring, the sample injection valve is switched, and driven by the carrier gas, the sample enters into the chromatographic column for separation. One way of total hydrocarbon is obtained by entering the FID detector, and the other channel of oxygen and methane are separated from the PQ column and then into the 5A column. After switching the valve position, the hydrocarbons are blown back, and the methane is detected by the FID detector.
Environmental air on-line monitoring or scientific research, petrochemical, spraying, printing and other emissions or factory boundary on-line monitoring.