Influence of Hydrogen
Tunable diode laser oxygen gas analyzers are increasingly being used in harsh industrial applications due to their high selectivity, absence of drift, and low maintenance requirement. There are two competing TDL measurement techniques in common use: direct absorption spectroscopy (DAS) and wavelength modulation spectroscopy (WMS). Both techniques are immune to the presence of background gases, except hydrogen. Here, DAS offers a significant advantage.
Discover in this white paper:
- The basics of WMS and DAS
- How the presence of hydrogen negatively affects the accuracy of WMS
- Why it is important to use a TDL that is immune to hydrogen