Proton exchange membrane fuel cell humidity sensor

Details Proton exchange membrane fuel cell humidity sensor Proton exchange membrane fuel cell humidity sensor

2011-05-24

2011-05-24

Williams, Hezron (Department: 2856)

Measuring and testing

Gas analysis

Moisture content or vapor pressure

Reexamination Certificate

active

07946151

ABSTRACT:
A humidity sensing device for determining the amount of humidity in at least one primary fluid stream that is passed to a fuel cell stack is provided. The sensing device includes an outer housing and an inner housing. The outer housing is positioned within at least one conduit such that the outer housing and the conduit coact with each other to generate at least one secondary fluid stream from the primary fluid stream. The inner housing is positioned within the outer housing such that the inner housing is configured to receive the secondary fluid stream and to measure an amount of water present in the secondary fluid stream to determine the amount of humidity in the primary fluid stream.

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Annotated front page of United States Patent 4,131,011, originally published on Dec. 26, 1978.

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