The GC3900Pro gas chromatograph is a professional version model, using a 7-inch touch screen, stable pressure and flow control flow path, optional (EPC electronic flow pressure control system, pressure flow digital display function, discarding the pressure gauge Mechanical display), digital circuits, IP communication technology, bus technology, network transmission, digital 485 transmission, online analysis of chromatographic instruments, remote control, etc., and up to three detectors can be installed.