We tested the filter material of the 3M 8210 Plus N95 mask. We used a custom setup to perform the testing.
This is the website for PCE.
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We use this particle counter from PCE for the testing device.
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These are some videos from the company.
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This is another mask we tested from Honeywell.
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This is the CDC guide to filters.
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![](https://s2.save4k.ru/pic/bKmc_UXoH4Y/maxresdefault.jpg)