ISO Classification Table
| ISO Class Number | 0.1 µm | 0.2 µm | 0.3 µm | 0.5 µm | 1 µm | 5 µm |
|---|---|---|---|---|---|---|
| 1 | 10 | |||||
| 2 | 100 | 24 | 10 | |||
| 3 | 1,000 | 237 | 102 | 35 | ||
| 4 | 10,000 | 2,370 | 1,020 | 352 | 83 | |
| 5 | 100,000 | 23,700 | 10,200 | 3,520 | 832 | |
| 6 | 1,000,000 | 237,000 | 102,000 | 35,200 | 8,320 | 293 |
| 7 | 352,000 | 83,200 | 2,930 | |||
| 8 | 3,520,000 | 832,000 | 29,300 | |||
| 9* | 35,200,000 | 8,320,000 | 293,000 |
*This class is only applicable in operation*