Which instrument measures humidity?

Which instrument measures humidity?

• A. Barometer
• B. Thermometer
• C. Anemometer
• D. Hygrometer

Answer: (D)

Humidity is the amount of water vapor in the air, and measuring it is done with a hygrometer. A hygrometer gives readings of how moist the air is, sometimes in terms of relative humidity or dew point, helping you understand conditions like fog, dew, or how comfortable the air feels. Barometers measure atmospheric pressure, which helps forecast weather but not how humid it is. Thermometers measure temperature, which affects how much water vapor air can hold. Anemometers measure wind speed, not humidity. So the instrument that measures humidity is the hygrometer.

Humidity is the amount of water vapor in the air, and measuring it is done with a hygrometer. A hygrometer gives readings of how moist the air is, sometimes in terms of relative humidity or dew point, helping you understand conditions like fog, dew, or how comfortable the air feels. Barometers measure atmospheric pressure, which helps forecast weather but not how humid it is. Thermometers measure temperature, which affects how much water vapor air can hold. Anemometers measure wind speed, not humidity. So the instrument that measures humidity is the hygrometer.