The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 2008
Filed:
Dec. 20, 2005
Eugene Tokhtuev, Duluth, MN (US);
Christopher J. Owen, Duluth, MN (US);
Paul Schilling, Duluth, MN (US);
Anna Pilipchenko, Duluth, MN (US);
Paul R. Kraus, Apple Valley, MN (US);
Katherine M. Sanville, White Bear Lake, MN (US);
Eugene Tokhtuev, Duluth, MN (US);
Christopher J. Owen, Duluth, MN (US);
Paul Schilling, Duluth, MN (US);
Anna Pilipchenko, Duluth, MN (US);
Paul R. Kraus, Apple Valley, MN (US);
Katherine M. Sanville, White Bear Lake, MN (US);
Ecolab Inc., St. Paul, MN (US);
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.