The Industrial Gas Chromatograph "MAG" (Model KS 50.310-000), in explosion-proof design, is intended for continuous automatic measurement of the molar fraction of components of natural combustible gas (NCG) in accordance with GOST 31371.7-2008 (ISO 6974), using methods A and B, followed by the calculation of combustion heat, relative and absolute density, compressibility factor, and Wobbe index values based on the component composition in accordance with GOST 31369-2008 (ISO 6976).