Model CA-6210 measures O2, CO, draft pressure, supply air temperature, and stack temperature. These multi-gas combustion analyzers are advanced tools for tuning burners on light commercial and industrial boilers for maximum efficiency and safety. The CA-6210 Multi-gas Combustion Analyzer is the basic analyzer in the series CA-6200 with features that include a heavy-duty gas sampling probe and field upgrade capabilities. The CA-6213 can be field upgraded with gas sensors to measure high-concentration CO, up to 2%, SO2, or NO and NO2 for determination of NOx. The standard heavy-duty gas sampling probe includes an in-line water trap and a unique, long lasting, serviceable filter. Custom length gas sample probe/hose assemblies are available.