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Unit price S$75 Delivery in Singapore is free of charge. Delivery outside of Singapore will
include postage charges and may include import duty. Delivery in Singapore normally within 5
working days. (Goods sold not refundable or
exchangeable) |
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PARTICLE SIZE TABLE |
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Particle |
Particle
Size |
Particle
Size |
|
|
(microns)
min |
(microns)
max |
|
one
inch |
25400 |
25400 |
|
Eye
of a Needle |
1230 |
1230 |
|
Glass
Wool |
1000 |
1000 |
|
dot (.) |
615 |
615 |
|
Spanish
Moss Pollen |
150 |
750 |
|
Beach
Sand |
100 |
10000 |
|
Dust
Mites |
100 |
300 |
|
Mist |
70 |
350 |
|
Human
Hair |
60 |
600 |
|
Human
Hair |
40 |
300 |
|
Saw
Dust |
30 |
600 |
|
Ginger |
25 |
40 |
|
Cayenne
Pepper |
15 |
1000 |
|
Fertilizer |
10 |
1000 |
|
Pollens |
10 |
1000 |
|
Textile
Fibers |
10 |
1000 |
|
Ground
Limestone |
10 |
1000 |
|
Mold
Spores |
10 |
30 |
|
Tea
Dust |
8 |
300 |
|
Mustard |
6 |
10 |
|
Antiperspirant |
6 |
10 |
|
Textile
Dust |
6 |
20 |
|
Grain
Dusts |
5 |
1000 |
|
Coffee |
5 |
400 |
|
Hair |
5 |
200 |
|
Red
Blood Cells |
5 |
10 |
|
Gelatin |
5 |
90 |
|
Iron
Dust |
4 |
20 |
|
Bone
Dust |
3 |
300 |
|
Cement
Dust |
3 |
100 |
|
Starches |
3 |
100 |
|
Mold |
3 |
12 |
|
Spores |
3 |
40 |
|
Combustion-related
- motor vehicles, wood burning, open burning, industrial processes |
2.5 |
2.5 |
|
Spider
web |
2 |
3 |
|
Lead
Dust |
2 |
2 |
|
Fiberglass
Insulation |
1 |
1000 |
|
Fly
Ash |
1 |
1000 |
|
Milled
Flour, Milled Corn |
1 |
100 |
|
Coal
Dust |
1 |
100 |
|
Smoke
from Synthetic Materials |
1 |
|
|
Auto
and Car Emission |
1 |
150 |
|
Anthrax |
1 |
5 |
|
Yeast
Cells |
1 |
50 |
|
Humidifier |
0.9 |
3 |
|
Asbestos |
0.7 |
90 |
|
Calcium
Zinc Dust |
0.7 |
20 |
|
Talcum
Dust |
0.5 |
50 |
|
Copier
Toner |
0.5 |
15 |
|
Liquid
Droplets |
0.5 |
5 |
|
Insecticide
Dusts |
0.5 |
10 |
|
Bacteria |
0.3 |
60 |
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one micron is one-millionth of a
meter Airborne particles Airborne particles are solids
suspended in the air. Larger particles - larger then 100 μm terminal velocities > 0.5 m/s fall out quickly includes hail, snow, insect debris,
room dust, soot aggregates, coarse sand, gravel, and sea spray Medium-size particles - in the range 1 to
100 μm sedimentation velocities greater
than 0.2 m/s settles out slowly and includes fine
ice crystals, pollen, hair, large bacteria, windblown dust, fly ash, coal
dust, silt, fine sand, and small dust Small particles - less than 1 μm falls slowly, take days to years to settle out of
a quiet atmosphere. In a turbulent atmosphere they may never settle out can be washed out by water or rain includes viruses, small bacteria,
metallurgical fumes, soot, oil smoke, tobacco smoke, clay, and fumes Hazardous Dust Particles Smaller dust particles can be
hazardous for humans. In many jurisdictions dust fractions at specified
particle sizes in working environments are required to be measured. Inhalable Dust Airborne particles which can enter
the nose and mouth during normal breathing. Particles of 100 microns diameter
or less. Thoracic Dust Particles that will pass through the
nose and throat, reaching the lungs. Particles of 10 microns diameter and
less. Referred to as PM10 in the USA. Respirable Dust Particles that will penetrate into
the gas exchange region of the lungs. A hazardous particulate size less than
5 microns. Particle sizes of 2.5 micron (PM2.5) are often used in USA. |
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