Combustion is one of the most important industrial processes providing heat and power for operation.Gas analysers based on tunable diode laser absorption spectroscopy (TDLAS) are ideal for highly selective and sensitive real-time and in-situ combustion monitoring, resulting in optimised fuel consumption and thus lower costs while minimising pollutant generation. TDLAS is now considered a proven […]

A laser-based hydrogen (H2) sensor using wavelength modulation spectroscopy (WMS) was developed for the contactless measurement of molecular hydrogen. The sensor uses a distributed feedback (DFB) laser to target the H2 quadrupole absorption line at 2121.8 nm. The H2 absorption line exhibited weak collisional broadening and strong collisional narrowing effects. Both effects were investigated by […]