Back to results
US 4,304,996 AGranted
Water sterilizer and organic matter measurement instrument
AssigneePure Cycle Corporation
InventorFrederick K. Blades
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneePure Cycle Corporation
InventorFrederick K. Blades
Estimating the term…
A combined instrument for the determination of the quantity of organic material present in a water sample is disclosed which features a first photosensor adapted to regulate the output of a source of ultraviolet regulation at a constant level and a second substantially identical photosensor positioned so as to view the same portion of the source of ultraviolet radiation as the first photosensor. The second photosensor produces a signal proportional to the transmittance of the ultraviolet radiation through the water sample and hence inversely proportional to the amount of organic material contained within the water. Such an instrument is also disclosed in combination with a water sterilizer in which the same source of ultraviolet radiation used as to monitor the amount of organic material present in the water is also arranged to provide ultraviolet radiation to the water or provide a bactericidal and sterilizing effect to the water.
Instrument for measuring the transmission of ultraviolet radiation through a sample of fluid, comprising a first radiation-sensitive device spaced a first short distance from a source of said radiation within said fluid sample and used to control said source such that the intensity of said radiation passing through said sample, and incident on said device remains constant, and a second radiation sensitive device spaced a second, longer distance within said sample from said source, whereby said second radiation sensitive device produces a signal proportional to the transmission of ultraviolet radiation through a distance in said fluid sample equal to the difference between said first and second distances.
An apparatus for the sterilization of water by exposure of said water to ultraviolet radiation and for monitoring the organic content of said water, comprising a source of ultraviolet radiation for sterilizing said water, a tank for containing said water such that said water is exposed to said radiation for a period sufficient that said radiation exerts a bactericidal effect on said water, first sensor means responsive to ultraviolet radiation for controlling the radiation emitted by said source and incident on said first sensor means at a substantially constant level, and second means responsive to ultraviolet radiation for generating a signal in response thereto proportional to the organic content of said water, wherein said source of ultraviolet radiation for sterilization is also the source of the radiation measured by said means responsive to ultraviolet radiation, wherein the optical paths leading from said source of ultraviolet radiation to said first and second means responsive to ultraviolet radiation are substantially identical except as to length.
Dependencies are inferred from the claim text.