Recently some half decent pumps are going on auction here for reasonable money, so I'm in the market for one, thing is they use Pascal (Pa) here for vacuum pump ratings, not the "Inches of Mercury" (inch Hg) like I'm used to.
I think, IIRC that I should be looking for at least 15" Hg, better to have closer to 20" Hg, right?
From what I can see, 1" Hg equals 3386 Pa
So say 18" Hg would be about 61000 Pa.
Now on the various websites I find here, they list this a 6.1 x 10-4
Sorry but my math sucks on stuff like this, does 5 x 10-4 = 50000
Or some such thing, must be an "Engineer" thing I guess