Most hygrometers measure which of the following?

Most hygrometers measure which of the following?

• A. Temperature
• B. Pressure
• C. Percentage of relative humidity (% rh)
• D. Airflow

Answer: (C)

Humidity is what a hygrometer measures, and most devices report the percentage of relative humidity. Relative humidity tells you how close the air is to being saturated with water vapor at the current temperature, expressed as a percent. This makes RH the practical metric for comfort, mold prevention, and HVAC control because it directly relates moisture in the air to how warm or cool you feel. Temperature, pressure, and airflow are measured by their own sensors, not by a hygrometer. Some instruments combine sensors and may show dew point or absolute humidity, but the standard hygrometer output is percent relative humidity.

Humidity is what a hygrometer measures, and most devices report the percentage of relative humidity. Relative humidity tells you how close the air is to being saturated with water vapor at the current temperature, expressed as a percent. This makes RH the practical metric for comfort, mold prevention, and HVAC control because it directly relates moisture in the air to how warm or cool you feel. Temperature, pressure, and airflow are measured by their own sensors, not by a hygrometer. Some instruments combine sensors and may show dew point or absolute humidity, but the standard hygrometer output is percent relative humidity.