A microhygrometer has been developed at JPL's Microdevices Laboratory based on the principle of dewpoint/frostpoint detection. The surface acoustic wave device used in this instrument is approximately two orders of magnitude more sensitive to condensation than the optical sensor used in chilled-mirror hygrometers. In tests in the laboratory and on the NASA DC8, the SAW hygrometer has demonstrated more than an order of magnitude faster response than commercial chilled-mirror hygrometers, while showing comparable accuracy under steady-state conditions. Current development efforts are directed toward miniaturization and optimization of the microhygrometer electronics for flight validation experiments on a small radiosonde balloon.


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    Title :

    Surface Acoustic Wave Microhygrometer


    Additional title:

    Sae Technical Papers


    Contributors:
    Price, D. (author) / Cheng, D. Y. (author) / Cardell, G. (author) / Hoenk, M. E. (author) / Watson, R. K. (author) / VanZandt, T. R. (author) / Kaiser, W. J. (author)

    Conference:

    International Conference On Environmental Systems ; 1997



    Publication date :

    1997-07-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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