Measurements of Gas Temperature and Component Concentration Based on Calibration-Free Wavelength-Modulation Spectroscopy

Research on temperature compensation method for methane sensor based on TDLAS

“…In order to address the impact of environmental temperature changes on gas concentration measurement using TDLAS technology, several universities and research institutions have conducted temperature compensation research on TDLAS technology. In 2013, Qu Dongsheng and others from Beijing Institute of Equipment scanned two infrared absorption spectra of H2O, and simultaneously measured the concentration and temperature of the gas [6] . They conducted comparative experiments with thermocouple temperature measurement and direct absorption spectrum concentration measurement, with maximum relative deviations of less than 4% and 5%, respectively.…”