Pars Hesgar Damoon Co. is a research and engineering group works on design and fabrication of gas sensor products such as sensors, calibration systems and e-nose. The group has successful experiences in producing innovative gas detection equipment such as hydrogen and alcohol detectors. Our recent calibration systems are released in two desktop and portable versions, which facilitate simultaneous data acquisition from several gas sensors, applying arbitrary wave functions to sensors and analyzing the results. In the desktop device, the system is equipped with a gas chamber with controlled humidity and temperature. Our calibration systems, especially the portable one can be used as a gas leakage detector in different industries.