The general purpose gas chromatograph (GC) is configured the high-precision flow control modules, different detection units according to the measuring components and applications, injection units. Different inlet ports will be installed based on the types of column, either split/splitless injection unit (SPL) or single packed injection unit (SINJ). The cooling time of the column oven from 450 degrees Centigrate to 50 degrees Centigrate is as low as 4 min. It is widely used in food and pharmaceutical monitoring, environmental monitoring, chemical industry, petroleum and other fields.