New IR-UV gas sensor to energy and transport sector

In situ simultaneous measurements of gas temperature and gas composition are of great interest in combustion research. An optically based technique can be performed in situ for various extremely hard conditions. Analysis of the fine structure of the UV absroption bands of NO, SO2 or O2 allows determination of a value of the gas temperature. UV absorption cross sections of CO2, H2O and SO2 at elevated temperatures are reported. Design of a new developed 9-m long water-cooled fiber optic probe with removable optical head suitable for fast IR/UV local gas absroption/emission measurements is described. The probe performance was successfully tested in several trial measurements on full scale mulit-fuel fired boiler. A concept of fast time/spectral-resolved measurements has been used in measurements on a large ship engine