The correct answer is Hygrometer.
Key Points
- Hygrometer
- A hygrometer is an instrument for measuring the relative humidity of the atmosphere.
- The hygrometer was invented by Leonardo da Vinci.
Additional Information
- Barometer
- A barometer is an instrument used to measure atmospheric pressure.
- The barometer was invented by Torricelli.
- Hydrometer
- A hydrometer is an instrument used to measure the specific gravity of liquids.
- The hydrometer was invented by Nicholson.
- Anemometer
- An anemometer is an instrument used to measure the velocity of wind and directions.
- The anemometer was invented by Leon Alberti.



