Correct Answer : Hygrometer
Explanation :
Humidity sensors are electronic devices enabling you to measure the environment’s humidity and convert the data into a corresponding electrical signal that can be used for different purposes. You might have heard a different humidity sensor name: Hygrometers! They are also called hygrometers but “humidity sensor” is more common.
Humidity measurement instruments usually rely on measurements of some quantity such as temperature, pressure, mass or a mechanical or electrical change etc,.
