Subscriber Mask Fit Testing Submissions: 3M KF94 - Champak - Dräger - Vitacore скачать в хорошем качестве

Subscriber Mask Fit Testing Submissions: 3M KF94 - Champak - Dräger - Vitacore

Redditor grw110 sent me an amazing collection of masks to test. This video features 4 really promising ones from Korea, Taiwan, Germany/USA and Canada. And one of them I really liked - it’s too small for me, but it’s a really neat mask. Big thanks to grw110 for the masks. Fit is very individual. I have a medium sized face and a high nose bridge. You may get a very different fit than I do, which is why I'd really like to see more people have access to mask fit testing so they can find the masks that fit and filter for them really well. There are two basic kinds of fit testing used for N95s and other filtering facepiece respirators: The kind I do with a particle counter mask fit testing machine ("quantitative"), and there is the kind where a flavored aerosol is used, that you can taste if the aerosol gets through your mask ("qualitative"). I'm doing a very abbreviated version of mask fit testing with just a static 60 second test, but I'm using the same type of particle count test used on N100 masks, so some of the fit test scores may be lower than if I used the less demanding N95 mask fit test. Testing for workplace use involves moving your head and body to make sure the mask works even when you aren't sitting still. 1:29 3M Bi-fold KF94 https://www.3m.co.id/3M/en_ID/persona... 4:13 3M Bi-fold KF94 with Fix the Mask 4:50 Champak PC520L Bi-fold N95 https://cleanlife.com/products/niosh-... 6:14 Dräger X-plore 1750 Bi-fold N95 https://www.draeger.com/en-us_ca/Prod... 7:31 Vitacore CAN99e https://shop.vitacore.ca/products/can99e — In the video I'm using a PortaCount mask fit testing machine that gives scores in "Fit Factor". Fit factor is the the concentration of ambient particles outside the mask divided by the concentration inside the mask. So if there were 1000 particles outside and 10 inside, 1000 divided by 10 is 100, so the air inside the mask is 100 times cleaner and the fit factor is 100. The Portacount counts particles from .02 to 1 micron in size.