Accurate, reliable, robust & fast, the Si-CA 8500 Combustion Analyzer is the most powerful and advanced portable emissions analyzer on the market.  Complete portable tool for emissions level monitoring of boilers, engines, and other combustion equipment, this emissions monitoring device can boast as many as 9 gas sensors, detecting one of the widest spectra of gases: O2, CO, NO, NO2, SO2, CO2, CxHy, High CO, VOCs and H2S.