What is one benefit of using a Rotameter in air sampling?

Using a Rotameter in air sampling provides the benefit of offering direct and accurate volume measurement. This is crucial in occupational hygiene monitoring, where precise measurement of airflow rates is necessary to ensure that sampling is conducted under known and controlled conditions. The Rotameter operates on the principle of variable area flow measurement, which means it provides a clear, visual indication of flow rate as the float inside the tapered tube rises and falls according to the flow of air.

This accuracy is vital for various applications, such as determining the concentration of contaminants in air samples, which directly impacts compliance with safety regulations and the effectiveness of exposure assessments. Knowing the volume of air sampled allows practitioners to calculate exposure levels and make informed decisions regarding workplace safety.

While the other options do present some advantages of different devices or methods, they do not specifically highlight the relevance of accurate volume measurement, which is fundamental in the context of air sampling for occupational hygiene.