Jarf Andishan Sanaye Kimia Co. (LTD) founded on 2008 by a group of experts and engineers who had about 15 years in installing, maintenance and repairing instruments and analyzers specially in the field of Air Quality Monitoring, Noise Monitoring and Meteorological Instruments. We are expert in old generation Thermo Environmental analyzers, Horiba Ambient, vehicle and stack analyzers, Environnement SA old and new generation analyzers, MRU vehicle and stack analyzers, ABB analyzers, MetOne and ... We are the biggest contractor of existing Air Quality Monitoring Stations (AQMS) of Tehran Department Of Environment (DOE) with about 32 AQMS in Tehran from 2009 until now. Also we are responsible of maintenance and repairing about 20 more stations in the Lorestan, Markazi, Yazd, Hormozgan, Kordestan and Qom provinces.