The EDL is a long-life electrodeless discharge lamp which, due to the filling gas used, is suitable as a light source in spectrometers based on the principle of resonance absorption measurement and is used in particular for measuring nitrogen oxides in the air.
Use
The EDL is used, for example, in process photometers to measure NOx and SOx. These devices are primarily installed in industry for exhaust gas monitoring in power stations and combustion plants.
Fields of application
The outstanding properties of the standard EDL have sparked interest in other fields of application. Other gas fillings have now also been successfully developed and tested. For example, fillings with mercury for the determination of mercury and fillings with deuterium for use in normal photometric measurement methods. These lamps also achieve very long lifetimes.
The following gas fillings was offered :
- N2:O2 Gas mixture
- Mercury
