3 ms·
How did you determine those percentages?
by wrycoder 5y ago
How did you determine those percentages?
- lloydarmbrust 5y agoUsing the industry standard TSI PORTACOUNT® RESPIRATOR FIT TESTER 8048 It measures the air outside the mask verses inside the mask. https://tsi.com/products/respirator-fit-testers/portacount-respirator-fit-tester-8048/ https://tsi.com/products/respirator-fit-testers/portacount-r...