Difference between revisions of "Hygrometer"
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Any of several instruments used for measuring atmospheric humidity. Some types of hygrometers are: | Any of several instruments used for measuring atmospheric humidity. Some types of hygrometers are: | ||
| − | + | * [[psychrometer]] - measures the temperature difference between a wet-bulb and a dry-bulb thermometer. A sling psychrometer is mounted in a frame, then whirled in the air for ventilation. | |
| − | + | * [[Hair hygrometer|hair hygrometer]] - measures the expansion and contraction of a human hair that is mounted under tension. A gold beater's skin hygrometer uses a proteinaceous membrane for the same type of measurement. | |
| − | + | * Dew-point hygrometer - measures the temperature for the formation and evaporation of dew that is observed using a photoelectric cell. | |
| − | + | * Diffusion hygrometer - measures the diffusion of water vapor through a porous membrane. | |
| − | + | * [[lithium chloride hygrometer]] - measures the temperature and electrical conductivity of a hygroscopic salt that becomes conductive when it absorbs water. | |
| − | + | * [[liquid crystal hygrometer]] - contains several chemical salts that respond to different humidity levels by rearranging their crystal structure. It never requires calibration. | |
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== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
dial hygrometer; hair hygrometer; dew-point hygrometer; diffusion hygrometer; lithium chloride hygrometer; liquid crystal hygrometer; hygrometr (Ces.); Hygrometer (Dan., Deut., Ned., Sven.); hygromètre (Fr.); higrómetro (Port.) | dial hygrometer; hair hygrometer; dew-point hygrometer; diffusion hygrometer; lithium chloride hygrometer; liquid crystal hygrometer; hygrometr (Ces.); Hygrometer (Dan., Deut., Ned., Sven.); hygromètre (Fr.); higrómetro (Port.) | ||
| − | == | + | ==Resources and Citations== |
* Boise Cascade Paper Group, ''The Paper Handbook'', Boise Cascade, Portland OR, 1989 | * Boise Cascade Paper Group, ''The Paper Handbook'', Boise Cascade, Portland OR, 1989 | ||
| − | + | * Marjorie Shelley, ''The Care and Handling of Art Objects'', The Metropolitan Museum, New York, 1987 | |
* Matt Roberts, Don Etherington, ''Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology'', U.S. Government Printing Office, Washington DC, 1982 | * Matt Roberts, Don Etherington, ''Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology'', U.S. Government Printing Office, Washington DC, 1982 | ||
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* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998 | * ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998 | ||
| − | * Wikipedia | + | * Wikipedia: http://en.wikipedia.org/wiki/Hygrometer (Accessed Jan. 15, 2006) |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Latest revision as of 14:31, 14 September 2022
Description
Any of several instruments used for measuring atmospheric humidity. Some types of hygrometers are:
- Psychrometer - measures the temperature difference between a wet-bulb and a dry-bulb thermometer. A sling psychrometer is mounted in a frame, then whirled in the air for ventilation.
- Hair hygrometer - measures the expansion and contraction of a human hair that is mounted under tension. A gold beater's skin hygrometer uses a proteinaceous membrane for the same type of measurement.
- Dew-point hygrometer - measures the temperature for the formation and evaporation of dew that is observed using a photoelectric cell.
- Diffusion hygrometer - measures the diffusion of water vapor through a porous membrane.
- Lithium chloride hygrometer - measures the temperature and electrical conductivity of a hygroscopic salt that becomes conductive when it absorbs water.
- Liquid crystal hygrometer - contains several chemical salts that respond to different humidity levels by rearranging their crystal structure. It never requires calibration.
Synonyms and Related Terms
dial hygrometer; hair hygrometer; dew-point hygrometer; diffusion hygrometer; lithium chloride hygrometer; liquid crystal hygrometer; hygrometr (Ces.); Hygrometer (Dan., Deut., Ned., Sven.); hygromètre (Fr.); higrómetro (Port.)
Resources and Citations
- Boise Cascade Paper Group, The Paper Handbook, Boise Cascade, Portland OR, 1989
- Marjorie Shelley, The Care and Handling of Art Objects, The Metropolitan Museum, New York, 1987
- Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
- Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
- Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
- Wikipedia: http://en.wikipedia.org/wiki/Hygrometer (Accessed Jan. 15, 2006)