Particle Size Comparator
| US Sieve Number | Micron Opening | Astm 11 Tolerance | Opening Inches |
|---|---|---|---|
25 | 710 | +/-30um | 0.0278 |
30 | 600 | +/-25um | 0.0234 |
35 | 500 | +/-20um | 0.0197 |
40 | 420 | +/-19um | 0.0165 |
45 | 350 | +/-16um | 0.0139 |
50 | 300 | +/-14um | 0.0117 |
60 | 250 | +/-12um | 0.0098 |
80 | 180 | +/-9um | 0.007 |
100 | 150 | +/-8um | 0.0059 |
120 | 125 | +/-7um | 0.0049 |
140 | 106 | +/-6um | 0.0041 |
170 | 90 | +/-5um | 0.0035 |
200 | 75 | +/-5um | 0.0029 |
230 | 63 | +/-4um | 0.0025 |
270 | 53 | +/-4um | 0.0021 |
325 | 45 | +/-3um | 0.0017 |
400 | 38 | +/-3um | 0.0015 |
500 | 25 |