An ultraviolet light detector for detecting levels of ultraviolet light in a liquid disinfection unit comprises two solid state silicon photodetectors. A first photodetector generates a photo-induced current proportional to the amount of visible, infra-red, and ultraviolet light emitted. A second photodetector...http://www.google.se/patents/US6429438?utm_source=gb-gplus-sharePatent US6429438 - Ultraviolet light detector for liquid disinfection unit
