Lefel puro llwch 300,000
Lefel glendid aer ISO14644-1 (safon ryngwladol)
| Lefel glendid aer (N) | Terfyn crynodiad uchaf gronynnau sy'n fwy neu'n hafal i'r maint gronynnau a farciwyd (nifer y gronynnau aer / m3) | |||||
| 0.1wm | 0.2wm | 0.3wm | 0.5wm | 1.0wm | 5.0wm | |
| Dosbarth ISO1 | 10 | 2 | ||||
| Dosbarth ISO2 | 100 | 24 | 10 | 4 | ||
| Dosbarth ISO3 | 1,000 | 237 | 102 | 35 | 8 | |
| Dosbarth ISO4 | 10,000 | 2,370 | 1,020 | 352 | 83 | |
| Dosbarth ISO5 | 100,000 | 23,700 | 10,200 | 3,520 | 832. llariaidd | 29 |
| Dosbarth ISO6 | 1,000,000 | 237,000 | 102,000 | 35,200 | 8,320 | 293 |
| Dosbarth ISO7 | 352,000 | 83,200 | 2,930 | |||
| Dosbarth ISO8 | 3,520,000 | 832,000 | 29,300 | |||
| Dosbarth ISO9 | 35,200,000 | 8,320,000 | 293,000 | |||
Tabl cymhariaeth fras o raddau glendid mewn gwahanol wledydd
| PCS/M≥0.5wm | ISO 14644-1 (1999) | US 209E(1992) | US 209D(1988) | EEC cGMP(1989) | FFRAINC AFNOR(1981) | ALMAEN VDI 2083(1990) | JAPAN JAOA(1989) |
| 1 | - | - | - | - | - | - | - |
| 3.5 | 2 | - | - | - | - | 0 | 2 |
| 10.0 | - | M1 | - | - | - | - | - |
| 35.3 | 3 | M1.5 | 1 | - | - | 1 | 3 |
| 100 | - | M2 | - | - | - | - | - |
| 353 | 4 | M2.5 | 10 | - | - | 2 | 4 |
| 1,000 | - | M3 | - | - | - | - | - |
| 3,530 | 5 | M3.5 | 100 | A+B | 4,000 | 3 | 5 |
| 10,000 | - | M4 | - | - | - | - | - |
| 35,300 | 6 | M4.5 | 1,000 | 1,000 | - | 4 | 6 |
| 100,000 | - | M5 | - | - | - | - | - |
| 353,000 | 7 | M5.5 | 10,000 | C | 400,000 | 5 | 7 |
| 1,000,000 | - | M6 | - | - | - | - | - |
| 3,530,000 | 8 | M6.5 | 100,000 | D | 4,000,000 | 6 | 8 |
| 10,000,000 | - | M7 | - | - | - | - | - |
Ysgrifennwch eich neges yma a'i hanfon atom
