
A humidity sensor, also known as hygrometer or dew sensor, is used to monitor, measure, and detect the percentage of humidity in the air. Additionally, it also measures both moisture and air temperature. By measuring type, the humidity sensor can be categorized as absolute and relative. Relative humidity can be defined as the relationship or ratio of the presence of actual moisture content in the air to the possibility of maximum moisture content that can be sustained at a given temperature. Whereas, absolute humidity calculates the presence of moisture in the air, irrespective of the temperature.