Psychrometer

A psychrometer is a device used to measure the relative humidity in the air. It consists of two thermometers, one of which is a dry bulb thermometer and the other is a wet bulb thermometer. The dry bulb thermometer measures the ambient air temperature, while the wet bulb thermometer has a wet wick or cloth around its bulb. As the water evaporates from the wet bulb, it causes the temperature to decrease. By comparing the readings of the two thermometers, the relative humidity can be determined using a psychrometric chart or equation. Psychrometers are commonly used in meteorology, HVAC systems, and other applications where humidity control is important.