What does a sling psychrometer measure?

A sling psychrometer is an instrument specifically designed to measure the relative humidity in the air. It comprises two thermometers: a dry bulb thermometer that measures the air temperature and a wet bulb thermometer that has a cloth soaked in water over its bulb. When the device is swung through the air, the evaporation of water from the wet bulb lowers its temperature, which can be compared to the dry bulb reading. This difference in temperature provides critical information that can be used to calculate the relative humidity of the environment.

Understanding relative humidity is crucial in building performance analysis, as it affects indoor air quality, comfort, and the potential for moisture-related issues, such as mold growth. Thus, the sling psychrometer is an essential tool for professionals in the field to assess and manage these parameters effectively.