Hach HIAC ROC Manuel D'utilisation page 27

Table 12 SAE AS4059 cleanliness levels by particle count (continued)
Class 7
Class 8
Class 9
Class 10
Class 11
Class 12
1
Particle size based on the longest dimension.
2
Particle size based on the projected area equivalent diameter.
Maximum contamination limits (particles/100 mL)
100,000 38,900
200,000 77,900
400,000 156,000
800,000 311,000
1,600,000 623,000
3,200,000 1,250,000
6920 1220
13,900 2450
27,700 4900
55,400 9800
111,000 19,600
222,000 39,200
212 32
424 64
848 128
1700 256
3390 512
6780 1020
English 27