The petrochemical, gas processing, biogas, landfill and gas pipeline industries have for many years needed an accurate, dependable, efficient, and cost-effective trend H2S and CO2 analyzer for quality and process control purposes. Now, KECO has met these requirements with a proven microprocessor based technology which provides continuous on-line analysis based on the electrochemical and NDIR principal of operation. The gas being analyzed for H2S and CO2 is regulated to 10 PSI, then a flowmeter regulates the flow to approximately 1.5 SCFH.