The GCOM-3 Analyzer is a kind of VOCs monitoring product based on GC-FID Method. Equipped with FID detector and high-performance chromatographic separation column, it can detect organic pollutants including methane, total hydrocarbon and NMHC, low-carbon aldehyde ketone, BTEX (benzene, toluene, methylbenzene, xylene, ethylbenzene, cumene, etc.) VCM (vinyl chloride monomer) as well as part of haloalkane. It has designed internal heating box specialized for analysis gas path, which employs air-bath method to make chromatographic column as well as analysis gas path in the front or back of column stay at high-temperature state. During sampling and detection process of specific pollution source (high-temperature organic waste gas, such as emission of marine & diesel, emission from petrochemical refining flue, etc.), high-temperature tracing for sampling/analysis gas path can effectively prevent adsorption of sample gas with high boiling point and low vapour pressure on pipe wall, which solve the problem that measured result will be low under specific high-temperature working condition.