Gas Chromatographis a laboratory technique for the separation of a mixture use gas techniques. Labtech Gas Chromatographis Trainer is designed to demonstrate the operation, theory, repair and servicing of Gas Chromatographis equipment that used at clinics & hospitals. The unit is given the fault diagnosis so as to facilitate the teaching of trouble shooting techniques. A fault simulator is provided with circuit block diagram of the device for the students to study theoretically and experimentally in order to understand the operation of the device.