By Cnr Ifn
Tunable diode laser absorption spectroscopy is a technique for measuring the partial pressure of different species in a gaseous mixture. TDLAS can also be used to resolve pressure, temperature, velocity and mass flux of the sample. TDLAS sources are available from visible to IR range, making possible highly sensitive measurement of many gases, such as CO2, O2, H2O, CH4. TDLAS is useful to make non-invasive measurement, because it does not need physical contact with the sample.
