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Particle size measurement is the cornerstone of powder technology. Materials in a particulate form are used everyday in most industrial and household contexts. The size of the powder either for processing of high-tech ceramics used in the electronics of a mobile phone, or biomedical detection of tumours or salt in the kitchen deeply influences its physical properties - flowability, rate of dissolution for salt, magnetic properties of iron oxides among others.
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Particle Size Comparisons Chart
Measurements Sieve (Screen) Millimeters Microns (µ) Inches Mils U.S. Std. Sieve Designation* Tyler Std. Sieve 0.0254 25.4 0.00100 1.00 - - 0.0318 31.8 0.00125 1.25 - - 0.0381 38.1 0.00150 1.50 38 µm (No. 400) 400 mesh 0.0445 44.5 0.00175 1.75 45 µm (No. 325) 325 mesh 0.0508 50.8 0.00200 2.00 - - 0.0533 53.3 0.00210 2.10 53 µm (No. 270) 270 mesh 0.0635 63.5 0.00250 2.50 63 µm (No. 230) 250 mesh 0.0737 73.7 0.00290 2.90 75 µm (No. 200) 200 mesh 0.0762 76.2 0.00300 3.00 - - 0.0889 88.9 0.00350 3.50 90 µm (No. 170) 170 mesh 0.1016 101.6 0.00400 4.00 - - 0.1050 105.0 0.00413 4.13 106 µm (No. 140) 150 mesh 0.1250 125.0 0.00492 4.92 125 µm (No. 120) 115 mesh 0.1490 149.0 0.00587 5.87 150 µm (No. 100) 100 mesh 0.1770 177.0 0.00697 6.97 180 µm (No. 80) 80 mesh 0.2500 250.0 0.00984 9.84 250 µm (No. 60) 60 mesh 0.4200 420.0 0.01654 16.54 425 µm (No. 40) 35 mesh 0.8410 841.0 0.03311 33.11 850 µm (No. 20) 20 mesh 1.0000 1000.0 0.03937 39.37 1 mm (No. 18) 16 mesh
