Continuous gas analyzers are designed for ultra-precise in situ measurements of gas streams with continuous exposure to potentially hazardous and corrosive gaseous media.
They operate on the principle of tunable diode laser adsorption spectroscopy (TDLAS), which uses highly tuned wavelengths of laser light from permanently fixed diodes in a cross-stack system to measure the concentration of gas species at the parts per billion (ppb) range. Leading continuous gas analyzers may also be capable of quantitively assessing the temperature, pressure, and velocity of observed samples.