Question

To measure the Humidity in air, what instrument used? ​

Answer 1

humidity in air is measured by Hygrograph

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Answer 2

Answer:

hygrometer

Humidity is the measure of the amount of moisture in the air. A psychrometer is an example of a hygrometer. A psychrometer uses two thermometers to measure relative humidity; one measures the dry-bulb temperature and the other measures the wet-bulb temperature.