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 ...

If I can get a worker with facial hair to pass a quantitative fit test using a PortaCount, can I then allow that worker to wear the full facepiece without him needing to shave? The short answer?

Shoreview, MN, May 14, 2025 (GLOBE NEWSWIRE) -- TSI Incorporated, a global leader in Respirator Fit Testing, proudly announces the launch of the TSI Tempo™ Program, a unique and flexible solution, ...

The PortaCount Fit Tester Model 8048 provides a consistent and objective testing experience across all respirator types, including N95 filtering facepieces. FitCheck Mode shows in real-time how ...

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 ...