The Series 5900 Isothermal Gas Chromatograph features our patented Discharge Ionization Detector (DID) which detects trace gas impurities in the part per billion (ppb) range. This second generation DID gas chromatograph features our patented detector, LCD touchscreen control, custom valve configurations, and a corrosion resistant option. Manufacturers, distributors, and users of specialty, electronic, and industrial bulk gases can rely on the Series 5900 for superior detection limits, reproducibility, and accuracy.