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 ...

TSI’s PortaCount Respirator Fit Tester delivers an objective fit test for any respirator, including all N95s, in less than two and a half minutes. Using OSHA’s newly modified CNC protocols, fit tests ...

As the world is responding to the COVID-19 outbreak, fit testing respirators for healthcare workers and first responders remain vital to respiratory protection programs to reduce exposure to the ...