There has been designed and manufactured a microreactor for studies of kinetics of catalytic reactions. The reactor is linked through the system of six-port valves to the N-509 gas chromatograph equipped with the FID detector and the dosing system. Six-port valves are switched with pneumatic servos controlled by electromagnetic valves. A PC-class computer equipped with suitable card and software controls electromagnetic valves. Control program makes possible continuous and impulse work of the microreactor, injection or taking of samples at any pressure as well as recording of chromatograms.