Particlepostage stamp (1 inch)
beach sand
eye of a needle
pollens
saw dust
coffee
dust mites
table salt
human hair
lower limit of visibility (naked eye)
household dust
mold spores
white blood cells
talcum powder
red blood cells
bacteria
spider web
lead dust
corn starch
tobacco smoke
90% of all oil contaminants
0.001 millimeter |
Particle Size (Microns)25,400
100-2000
1230
10-1000
30-600
4-400
100-300
120
70
40
40
10-30
25
10
8
3
2-3
2
0.1-0.8
0.5
0.5-2
1 |
