The N95 masks that everyone is talking about means that is will filter out of 95% of the 3 microns or larger. The Covid 19 virus is approximately 0.17 microns but usually travels attached to a fluid droplet, which is larger. The thickness of a piece of paper is about 100 microns.
> > On May 22, 2020 at 7:14 PM, <AKS-Gmail-IMAP via Sprinklerforum > (mailto:[email protected])> wrote: > > > On May 22, 2020, at 2:49 PM, Sprinkler Academy - C Bilbo via Sprinklerforum > <[email protected] > (mailto:[email protected])> wrote: > > > > > > > > > > > > ..... for the record a micron is about the thickness of a sheet of paper. > > > > > > > > No way. Is not a micron a millionth of a meter? A meter is about 39 inches. > That means an inch is slightly more than 25641 microns. I’ve got an unopened > ream of printer paper here that is 2 1/8” thick and it consists of 500 > sheets. Say it is 2” thick to make the numbers easier. So 1” is 250 sheets, > not 25641 sheets. A micron being the thickness of a sheet of paper is two > orders of magnitude off the mark. You meant to say a micron is about one > hundredth the thickness of a sheet of paper. A lot of microns can fit on the > head of a pin. > _______________________________________________ Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >
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