The COMTEC 6000 is an In-Situ analyser for measurement of O2 and COe (sum of unburned molecules – CO, H2, CxHy) in flue and process gases. The correlation of the O2 and COe measurements enables combustion fine tuning in real time. Both sensors are located within the process at the tip of the probe installed directly in the flue gas duct. This allows for fast and continuous flue gas data measurement, enabling fast response rates to changes in the flue gas composition.