This is amazing, not only a lower cost CPC for measuring mask fit and ultrafine particles in a room, but also a new probe to measure fit of a respirator without destroying it, check out the video from @openaeros and @masknerd to see how it works ( https://www.youtube.com/watch?v=R_P0gM5Gudo ). 🧵 1/

#N95 #CPC #OpenAeros #OpenCPC #Respirator #FitTesting #AirCleaner

New COVID-conscious friends and dating app just dropped!

https://www.refreshconnections.com/

#covid #covidconscious #N95 #MaskUp #CDCsays #COVIDcautious #HEPA #covid19 #COVIDaware #elastomeric #FloMask #CovidSafety #immunocompromised #disability #sars #novavax #COVIDisAirborne #longcovid #covidsafe #KN95 #FitTesting #CovidIsNotOver

New COVID-conscious friends and dating app just dropped!

refreshconnections.com

#covid #covidconscious #N95 #MaskUp #CDCsays #COVIDcautious #HEPA #covid19 #COVIDaware #elastomeric #FloMask #CovidSafety #immunocompromised #disability #sars #novavax #COVIDisAirborne #KN95 #FitTesting #CovidIsNotOver

Q+A / How to Post

The previous post's instructions you may have seen here is **not recommended anymore!** Instead, follow the steps below:... #cpcsupport #8020agang #niosh #8020a #8020m #8020 #tsi #m41pats #openaeros #fittest #fittesting #portacount #CPCSupport

https://fedia.io/m/CPCSupport/t/516540

How do we know Saccharine and Bitrex Fit testing work and that passing a fit test using them means a fit factor of >100? It's validated against particle count fit testing using comparative trials.

Here's a cool history of the development of Bitrex fit testing by 3M, which was created with the brief to be less pleasant than Saccharine qualitative fit testing, but safer than irritant smoke.

https://multimedia.3m.com/mws/media/224182O/evaluating-effectiveness-of-qualitative-fit-tests-1995.pdf

#N95 #WearAMask #FitTesting