What can electronic hygrometers determine?

Electronic hygrometers are specialized instruments designed to measure various atmospheric conditions, specifically relative humidity, air temperature, and dewpoint temperature.

Relative humidity is a crucial measurement as it indicates the percentage of moisture present in the air compared to the maximum amount air can hold at a given temperature. This information is vital in various applications, including coatings inspection, where humidity levels can significantly impact the curing process and adhesion of coatings.

Additionally, electronic hygrometers often include temperature sensors, allowing them to provide the air temperature readings necessary for understanding the moisture content in relation to temperature. Dewpoint temperature is also an essential parameter that reflects the temperature at which water vapor begins to condense into liquid. Understanding the dewpoint helps inspectors predict conditions that could lead to condensation, which is critical in coating applications to avoid premature failure.

In contrast, moisture content alone does not encompass the full range of parameters measured by electronic hygrometers. Air quality and pressure/volume are different parameters typically assessed by other specialized instruments. Hence, option C accurately reflects the capabilities of electronic hygrometers in measuring relative humidity, air temperature, and dewpoint temperature.