What device measures humidity?

The device that measures humidity is known as a hygrometer. Humidity refers to the amount of water vapor present in the air, and a hygrometer is specifically designed to quantify this moisture content. There are various types of hygrometers, including mechanical, electronic, and psychrometric versions, each employing different methods to measure relative humidity.

In contrast, a thermometer measures temperature, a barometer measures atmospheric pressure, and an anemometer measures wind speed. These instruments serve distinct functions in meteorology and environmental monitoring, but only the hygrometer is dedicated to assessing humidity levels. This characteristic makes the hygrometer essential for understanding weather patterns, managing indoor air quality, and conducting various environmental health assessments.