The Series 400 is a compact, affordable Isothermal Gas Chromatograph with a Thermal Conductivity Detector (TCD) designed to take the demands of the educational or quality control laboratory. The Series 400 comes with polar and non-polar analytical columns installed for experiments in the academic lab. It can also be customized with manual or automatic gas sample valves for use in the QC lab. A 400-P Prep version and 400-MGA Medical Gas Analysis version are also available.