单词 | diffusion hygrometer |
释义 | diffusion hygrometer [dǝ`fyü·zhǝn hī`gräm·ǝd·ǝr] ENGINEERING A hygrometer based upon the diffusion of water vapor through a porous membrane; essentially, it consists of a closed chamber having porous walls and containing a hygroscopic compound, whose absorption of water vapor causes a pressure drop within the chamber that is measured by a manometer. |
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