E6000-5SH Gas Analyzer. O2 (0-25%), CO (0-8000ppm), NO/NOx (0-5000ppm), SO2 (0-5000ppm), and H2S (0-500ppm) Gas Sensors. The E6000-5SH Five Gas Industrial Portable Combustion Gas & Emissions Analyzer is a commercial and industrial gas analyzer that is a valuable tool designed for emissions monitoring and maintenance and tuning of combustion processes including boilers, burners, gas and diesel engines, turbines, furnaces, kilns, heaters, and laboratory analysis.