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Wet-bulb temperature
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Illustration of two psychrometers: on the left, a sling psychrometer with two thermometers and a handle for swinging; on the right, a stationary psychrometer with labeled dry-bulb and wet-bulb thermometers, wicks, and a water container. A wet bulb dry bulb thermometer, or hygrometer, with two glass thermometers mounted on a yellow board labeled dry and wet, used to measure humidity. Sling psychrometer A table showing relative humidity values dry-bulb temperature values on the y-axis and the difference between the dry-bulb and wet-bulb temperatures on the x-axis.

Wet-bulb temperature: References & Edit History

Article Contributors

Primary Contributors

  • Adam Volle
    Adam Volle is a freelance writer and editor based in Atlanta, Georgia. 

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Article title updated for style. Nov 10, 2026
Corrected display issue. Jun 09, 2026
Added table. Jun 08, 2026
Added an illustration of two types of psychrometers. Oct 26, 2023
New article added. Oct 25, 2023
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