NON-INTRUSIVE METHOD FOR SENSING GAS TEMPERATURE AND SPECIES CONCENTRATION IN GASEOUS ENVIRONMENTS

摘要

The invention relates generally to a non-intrusive method for sensing gas temperature and species concentration in gaseous environments. The method includes the steps of providing a tunable diode laser (TDL) sensor having a plurality of robust telecommunications diode lasers and a detector. The method further includes the steps of positioning the TDL sensor in alignment with an optical port of a vessel; using the lasers to transmit light through the optical port; using the detector to receive the transmitted light and transmit a signal to a data collection device; determining a ratio of absorbance for different absorption transitions; and determining a gas temperature from the ratio of absorbance.