Process gas`s temperature measuring method, involves guiding and receiving electromagnetic radiation via process gases, and determining temperature of process gases using measured spectral absorption properties of gas component

摘要

The method involves guiding and receiving an electromagnetic radiation via process gases (30) by a radiation source (210), and measuring spectral absorption properties of a gas component of the process gases in a region of absorption line of the gas component. Temperature of the process gases is determined using the measured spectral absorption properties of the gas component. Wavelength of a radiation source in a wavelength region is tuned in the region of the absorption line. Absorption line width of the absorption line is determined. An independent claim is also included for a measuring device for measuring temperature of a process gas.