Modifications to Respirator Fit Test Protocols

OSHA has accepted two Modified Ambient Aerosol Condensation Nuclei Counter (CNC) Quantitative Respirator Fit Test Protocols. The new protocols went into effect on September 26, 2019.


The Modified CNC protocols reduce the time needed to complete a CNC fit test from just over seven to under two and a half minutes. They also reduce the number of test exercises from eight to four.












(Image Courtesy of TSI Incorporated)

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Effective immediately, PortaCount® Respirator Fit Tester models 8030, 8038, 8040 and 8048 are uniquely positioned to run these modified CNC protocols. The protocols will be available via a simple, free software upgrade available for all users of these models.


Read the TSI press release here.


To learn more about how the PortaCount meets the new modified protocols, click here.


To find out more about the range of TSI PortaCount Respiratory Fit Testers available or to ask about an upgrade, click on the button below or fill in the contact form.

TSI PortaCount

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