Radiant energy – Invisible radiant energy responsive electric signalling – Ultraviolet light responsive means
Reexamination Certificate
2005-12-20
2008-05-13
Porta, David (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Ultraviolet light responsive means
C250S372000, C250S356100
Reexamination Certificate
active
07372039
ABSTRACT:
A UV absorption spectrometer includes a housing, a controller, and a sensor unit including an ultraviolet light source, an analytical area in an analytical cell or in running water or gaseous medium, and an UV wavelength separator including a UV detector. An ultraviolet light in a wavelength range of 200-320 nm emits from the light source through the analytical area to the wavelength separator, and the controller transforms output signals from the UV detector into absorbance values or optical densities for two or more wavelengths in the wavelength range, calculates differences of said absorbance values or optical densities, determines a concentration of a chemical in the solution with calibration constants found for a known concentration of the chemical and said differences of said absorbance values or optical densities.
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Kraus Paul R.
Owen Christopher J.
Pilipchenko Anna
Sanville Katherine M.
Schilling Paul
Ecolab Inc.
Eley Jessica L
Porta David
Shumaker & Sieffert P.A.
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