A Hiden CO Analyzer for integrating with the HPR-20 Gas Analysis systems complimenting mass spectrometer data for quantitative analysis of complex gas mixtures. Designed for gas analysis applications of syngas, biogas and catalysis studies where levels of CO are analyzed by the CO-A in the presence of nitrogen, carbon dioxide, methane and other gas mixtures. Gas sampling and data collection from the CO-A are fully integrated with the mass spectrometer system in hardware and software. A non-condensing gas sampling flow rate of ~ 800 ml/min is recommended for a response time of ~ 60 seconds. The CO-A is available with two concentration measurement range options: 0 – 2%, and 0 – 10%. Standalone CO Analyzers with measurement ranges: 0.04 – 1,000 ppm and 0 – 10,000 ppm are also available, with data acquisition integrated to the mass spectrometers.