UV-Germicidal/Bactericidal

High energy ultraviolet radiation in the UV-C spectral range from 100 to 280 nm is used in the germicidal/bactericidal sterilization of air and water. Due to its high and predominantly monochromatic output at 253,7 nm, low pressure mercury lamp is the light source of choice in these applications.
The life time of high power UV-C sources is limited. Therefore the UV-C intensity must be monitored periodically to control the process condition.

Since UV radiation is invisible to the human eye measurement with a good quality radiometer is the only way to know or monitor the output level for process control, dosimetry and also to assess health hazard risk. The UV radiometer should offer the functions and features required to fulfill the application requirements. The detector used in concert with the meter should be designed and configured to match the target application. A qualified UV broadband detector will offer:

• Coverage of the required spectral range with the appropriate spectral shape and minimal response outside this zone
• The proper measurement geometry for the quantity under test
• Good stability under long term use
• Calibration in the appropriate units with calibration correction to a specific source for added accuracy when required

Gigahertz-Optik has developed the solid-state solar blind photodiode UV-3718 detector for this application.

Additional information from our Products section:
UV-C Irradiance Light Detector: UV-3718
Possible Optometer: X9 11, P-9710

Additional information from our Tutorials section: VI.3. UV-Disinfection and Lamp Control