Gas Chromatographs Plasma Gas Chromatographs OrthoSmart Gas chromatographs measuring trace impurities including hydrocarbons without FID. DID Argon Gas chromatographs analysing H2, O2, N2, CH4, CO, CO2 in Argon. DID Helium Analysis of H2, Ne, O2+Ar, N2, Kr, CH4, CO, CO2 and Xe in Helium, Argon, Hydrogen, Nitrogen, Oxygen, Carbon Dioxide, Krypton and Xenon. OrthoPure DID Analysis of H2, Ne, O2+Ar, N2, Kr, CH4, CO, CO2 and XE in PPB level. Flame Ionization Gas Chromatographs FID Analysis of CH4, CO, CO2 & NMHC in Carbon Dioxide, Helium, Argon, Oxygen, Nitrogen, Hydrogen or Air. OrthoPure FID Analysis of CH4, CO, CO2 and NMHC in PPB and PPM. Environmental Series Air quality gas analysers. Katharometer Gas Chromatographs TCD Analysis of H2, O2, Ar, N2, CH4, CO, CO2, Kr, Ne, Xe, He in %.