Discover the key differences between qualitative and quantitative research. This guide explains their unique benefits, ...

The test subject shall conduct negative and positive pressure user seal checks until an acceptable fit is obtained with the selected respirator. Prior to performing a qualitative fit test, the test ...

Quantitative fit testing is the preferred testing method. The ambient aerosol condensation nuclei counting (CNC) method, using a Portacount® Plus instrument, has been selected as the quantitative fit ...