Since more than 30 years our group Chromatotec , alliance of the know -how of three companies, Chromato-Sud, Airmotec, Chromatotec, is specialized in the manufacturing and sales of gas analysers. Theses three trademarks will be integrated into the group Chromatotec in 1996. Worldwide known for its leading-edge of technology, our group proposes gas analysis systems with in-built computers and its own developed software, Vistachrom for analysis in continuous. We manufacture several analyser ranges which mounted in 19" rack and 4U height with everything included in the instrument. Our main GC 866 ranges are : _MEDOR range : analysis of sulphur compounds in natural gas (gas company) and ambient air (waste water pland application) since 1975 _AIRMO range : analysis of VOC / BTEX in ambient air (ppt / %) _CHROMA range : analysir of impurities in gas and in industrial air (ppb / %). This range has been developped since the creation of Chromato-Sud company in 1986.