Wet bulb temperature is the lowest temperature that can be obtained by evaporating water into the air at constant pressure. The term got its name from the technique of putting a wet cloth over the bulb of a mercury thermometer and then blowing air over the cloth until the water evaporates. Since evaporation takes up heat, the thermometer will cool to a lower temperature than a thermometer with a dry bulb at the same time and place. Wet bulb temperature can be used along with the dry bulb temperature to calculate dew point or relative humidity.

Log in or registerto write something here or to contact authors.