Fourier Transform Infra Red (FTIR) spectroscopy techniques are known to provide reliable results for gas temperature measurements and can be comparatively easily performed on an industrial scale such as a boiler on a power plant or an exhaust of a ship engine cylinder. However temporal resolution is not high enough to trace fast temperature variations which are of great importance for complete combustion diagnostics. To eliminate the above mentioned shortcoming, a new IR spectroscopic-imaging system has been developed at Risø DTU. The schematic of the system is presented. Results on lab and industrial scale are discussed. System’s flexibility and changeability which enable applying of a number of other methods for combustion diagnostics are demonstrated.