What are the two types of respirator fit tests?

The two types of respirator fit tests are qualitative and quantitative.

Qualitative fit testing involves subjective responses from the wearer regarding their perception of the fit. This test uses a challenge agent, such as a smell or taste, to determine if the respirator is properly sealed and protecting the wearer from contaminants. The individual’s ability to detect a leak indicates whether the respirator fits properly. Common qualitative tests include the saccharin test and the Bitrex test.

On the other hand, quantitative fit testing utilizes instruments to measure the actual amount of leakage into the respirator. This method provides a numerical value for the fit factor, which quantifies how well the respirator seals against the wearer’s face compared to the ambient air. Quantitative tests are typically more accurate and can be performed using machines that either measure the concentration of particles inside the respirator compared to outside or the flow rate of air.

In the context of lead abatement and occupational health, understanding the type of respirator fit testing is crucial for ensuring that workers are adequately protected from harmful airborne lead particles.