Electrodeless discharge lamps
In an electrodeless discharge lamp (EDL), the gas discharge is induced by an RF field.
Therefore, electrodes are not needed to discharge the gas which provides the following advantages compared to conventional UV lamps:
- Longer life of the lamp
- No reactions between the gas filling and the metal electrodes.
Heraeus supplies the following EDL products:
Excimer lamps
Excimer lamps are mercury-free UV lamps that emit a monochromatic UV radiation. The narrow band, the single spectral line and the possibility to select certain wavelengths make them ideal for specific applications. Moreover, they are energy-efficient and there is no undesired heat as excimer EDLs do not emit infrared radiation. The available wavelengths are: 172 nm, 222 nm, 282 nm and 308 nm. For small-scale applications, Heraeus supplies an excimer lamp with a wavelength of 222 nm and a power consumption of 10 W, with the dimensions 50 x 17 mm (length x diameter).
Applications:
- Chemistry
- Petroleum industry
- Biology
- Medicine
NOx lamps
An EDL lamp with a nitrogen/oxygen mixture gas filling emitting a spectrum in the wavelength range between 200 and 600 nm. Spectral lines in the range around 200 nm can be used for detection of NO and NO², H²S, NH³ and other compounds. Heraeus has many years of experience in the production of such UV light sources and cooperates closely with the relevant OEMs in the fields of environmental protection and control of process gases.
Fields of application:
- Combustion chemistry
- Exhaust gas monitoring
