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Instruction Manual for Expendable Dew Point Hygrometer.
Final rept. Dec 69-Jan 71,
EG AND G INTERNATIONAL INC WALTHAM MASS ENVIRONMENTAL EQUIPMENT DIV
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The Expendable Dew Point Hygrometer is a lightweight, battery powered, automatic dew point hygrometer developed for tropospheric balloon soundings. It is designed to be used in conjunction with a radiosonde in gathering meteorological data. The measurement of dew point temperature is accomplished by a thermistor mounted in a dew point sensor which senses temperature as a resistance and provides a signal to the radiosonde. The radiosonde is a balloon-borne, battery powered, meteorological instrument that automatically transmits radio signals relating to the atmosphere pressure, air temperature and dew point temperature of the upper air to ground receiving equipment. Author
APPROVED FOR PUBLIC RELEASE