Hygrometer
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A hygrometer is an instrument that measures humidity, that is, how much water vapor is present in the air. Humidity measurement instruments usually rely on measurements of some other quantities, such
A hair tension dial hygrometer with a nonlinear scale.
Deluc's hair tension whalebone hygrometer (MHS Geneva)
The interior of a Stevenson screen showing a motorized psychrometer
Psychrometer probably made in Switzerland circa 1850 by Kappeller (MHS Geneva)
Hygroscopy
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Hygroscopy is the phenomenon of attracting and holding water molecules via either absorption or adsorption from the surrounding environment, which is usually at normal or room temperature. If water mo
Hygrometer
…sensor. In the late 17th century, some scientists called humidity-measuring instruments hygroscopes; that word is no longer in use, but hygroscopic and hygroscopy, which derive from it, still are. Crude hygrometers were devised and developed during the Shang dynasty in Ancient China to study weather. The Chinese…
Air plant (Tillandsia bulbosa)
The aquatic file snake (A. granulatus) with hygroscopic skin, shown out of water
An orb-weaver spider (Larinioides cornutus) with hygroscopic coated capture threads
Waxy monkey tree frog (Phyllomedusa sauvagii)