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A system is provided for determining the concentration of a condensable vapor in the presence of at least one other condensable vapor, such as hydrogen peroxide and water vapors. The system includes generally a dew point sensor, a device for measuring at least one additional property of at least the

A system is provided for determining the concentration of a condensable vapor in the presence of at least one other condensable vapor, such as hydrogen peroxide and water vapors. The system includes generally a dew point sensor, a device for measuring at least one additional property of at least the other vapor such as relative humidity, and a microprocessor for fitting the dew point and additional property measurements into a modeled construct representative of the relationship between the vapors at a plurality of concentrations for each such vapor and at a plurality of corresponding dew point measurements. When used to determine the concentration of sterilant vapor in a sterilization system, the system also includes a sterilization chamber and an injector for injecting a measured quantity of the multicomponent condensable vapor into the chamber.

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A system for monitoring the concentration of a first vapor in the presence of at least one other vapor comprising: a chamber; means for injecting a predetermined quantity of a multicomponent vapor into said chamber, wherein said multicomponent vapor is formed from component vapors comprising a conde

A system for monitoring the concentration of a first vapor in the presence of at least one other vapor comprising: a chamber; means for injecting a predetermined quantity of a multicomponent vapor into said chamber, wherein said multicomponent vapor is formed from component vapors comprising a condensable first vapor and at least one other condensable vapor; means for measuring a primary property of said multicomponent vapor; means for measuring a secondary property of at least one component of said multicomponent vapor; and means for fitting said primary and secondary property measurements into a modeled construct representative of the relationship between said first vapor and said at least one other vapor at a plurality of concentrations of each said component vapor and at a plurality of said primary property measurements correlating to each said component vapor concentration.