Patent ID: 6429438
Filing Date: 2002-08-06
Classification: A61L,C02F,G01J,G01N

Abstract:
An ultraviolet light detector for detecting a level of ultraviolet light exposed to a liquid flowing within an ultraviolet liquid disinfection unit, said detector comprising:a first photodetector configured to generate a first electric signal proportional to a level of light received by the detector and within a first spectrum of wavelengths, said first spectrum including ultraviolet light; a second photodetector configured to generate a second electric signal proportional to a level of light received by the detector and within a second spectrum of wavelengths, said second spectrum substantially including said first spectrum except for a range of ultraviolet light; and circuitry connecting said first and second electric signals to generate an output electric signal proportional to a level of light received by the detector and within the range of ultraviolet light.