Wet-bulb temperature

Temperature of a thermometer covered by moist cloth A sling psychrometer. The small fabric sock covering the bulb of the upper thermometer is wet with distilled water and whirled around for a minute or more before taking the "wet-bulb" thermometer's reading. The lower thermometer provides the "dry-bulb" temperature. Humidity and hygrometry Specific concepts Dew point Dew point depression Psychrometrics General concepts Air Concentration Density Dew Evaporation Humidity buffering (Atm.) Pressure Liquid water Avogadro's law Nucleation Thermodynamic equilibrium Measures and instruments Heat index Sat. vap. density Mixing ratio Water activity H. indicator card Hygrometer Dry/Wet-bulb temperature vte The wet-bulb temperature is the lowest temperature that can be reached by the evaporation of water under current ambient conditions. It combines humidity and temperature to better reflect heat stress on humans, as the body's ability to cool itself through sweating is reduced at higher humidity. At 100% relative humidity, wet-bulb temperature is equal to air temperature, or dry-bulb temperature. At lower humidity, the wet-bulb temperature is lower than dry-bulb temperature due to evaporative