Which tool is typically used to measure humidity levels during a mold assessment?

The correct tool used to measure humidity levels during a mold assessment is a hygrometer. A hygrometer is specifically designed to measure the moisture content in the air, which is crucial when assessing conditions that could promote mold growth. Understanding humidity levels is vital because mold thrives in environments with high moisture.

While a humidity meter might sound appropriate, it is essentially another term for a hygrometer, so it may not be as commonly recognized. A thermometer primarily measures temperature, and it does not provide information about humidity. A barometer measures atmospheric pressure, which is not directly related to humidity levels. Therefore, the hygrometer is the most appropriate and commonly used instrument for assessing humidity in relation to mold development.