Mks Instruments, Inc.

Stephan Levine

Ulrich Alfred Brammer

Johannes Seiwert

Joachim Lohr

Jens Fittkau

An apparatus and method provide measurement of a constituent of a fluid, such as ozone in ozonated water. The apparatus includes a vessel to contain the fluid, a light source configured to direct a first band of light and a second band of light along a substantially shared path though the fluid, and a photosensor that senses the first band of light and the second band of light. The constituent has a greater absorption associated with the first band of light than with the second band of light. The method includes modification of a measured attribute of the component in response to the sensed second band of light to improve the accuracy of the measured attribute.

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Berlin, Germany

Stephan Levine