Humidity sensors are devices that measure the amount of moisture in the air. They work by detecting changes in electrical resistance or capacitance caused by humidity levels. These sensors are commonly used in various applications, including weather stations, HVAC systems, and industrial processes, to ensure optimal conditions. There are two main types of humidity sensors: capacitive and resistive. Capacitive sensors measure changes in capacitance as humidity varies, while resistive sensors measure changes in electrical resistance. Both types help monitor and control humidity, which is essential for comfort, health, and equipment performance.