Apparatus and method for measuring the concentration of gases in a sterilization chamber
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United States of America Patent
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Feb 1, 2011
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app pub date -
Aug 29, 2008
filing date -
Aug 29, 2008
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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.
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