Patent · US Active

Apparatus and method for measuring the concentration of gases in a sterilization chamber

US7880887B2 · kind B2 · utility

20Cited by

6References

41Claims

0Family size

Assignee

Phygen, LLC · US

Inventors

Steven J. Olson · Racine, US
Jami McLaren · Crystal, US
Steven Keith Isvik · New Brighton, US

Key dates

Filing date	Aug 29, 2008
Grant date	Feb 1, 2011
Priority date	—
Expiry date	Apr 3, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01N21/3151
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Accurate measurements of the concentration of a sterilant in a sterilization chamber are provided through the use of a light source, a first detector that receives light from the light source that has not passed through the sterilization chamber and a detector that receives light from the light source that has passed through the sterilization chamber. The light contains wavelengths known to be absorbed by the sterilant. A controller receives and processes signals received from the two detectors to cancel changes in the output of the light source and then apply a modified Beer-Lambert law to determine the concentration of the sterilant gas.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.