Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1992-07-16
1994-06-14
McMahon, Timothy M.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
73 2901, 250330, 250395, 2504951, 356 51, 356256, 422 83, 422 88, G01N 300
Patent
active
053199758
ABSTRACT:
This invention provides for a fiber optic moisture sensor. The sensor is comprised of a housing and a support positioned within the housing. The support is coated with a film. A first and second light guides are positioned within the housing and communicate illumination to and from the film. A reflective surface is positioned within the housing facing the film. The film comprises an optically transparent polymer and a salt complex of a metal ion and an organic compound. The salt complex is capable of absorbing moisture and emits a fluorescence signal when excited by light at the appropriate wavelength. The fluorescence signal can be quenched when the salt complex absorbs moisture. An apparatus incorporating the sensor and a method of making the sensor are also provided.
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Chu Ling
Pederson Henrik
McMahon Timothy M.
Rutgers The State University of New Jersey
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