humidity-sensitive element

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• radiosonde — /ray dee oh sond /, n. Meteorol. an instrument that is carried aloft by a balloon to send back information on atmospheric temperature, pressure, and humidity by means of a small radio transmitter. Cf. rawinsonde [1935 40; RADIO + SONDE] * * * ▪… …   Universalium

• hair hygrometer — noun : an absorption hygrometer with a sensitive element of human hair * * * a hygrometer actuated by the changes in length of a strand of human hair brought about by changes in the relative humidity. [1875 80] * * * hair hygrometer, a hygrometer …   Useful english dictionary

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• Hygrometer — Not to be confused with hydrometer. A hygrometer (UK: /haɪˈɡrɒmɪtə/) is an instrument used for measuring the moisture content in the environmental air, or humidity. Most measurement devices usually rely on measurements of some other quantity …   Wikipedia