All contamination limits in this application are in particles/100 mL
| Standard |
|---|
| Standard | >1 µm | >5 µm | >15 µm | >25 µm | >50 µm | >100 µm |
|---|---|---|---|---|---|---|
| >4 µm(c) | >6 µm(c) | >14 µm(c) | >21 µm(c) | >38 µm(c) | >70 µm(c) | |
| N particles cumulative | ||||||
| ISO 4ed 2021 | ||||||
| ISO 1ed 1987 | ||||||
| SAE cumulative |
| Standard | >1 µm ≤5 µm |
>5 µm ≤15 µm |
>15 µm ≤25 µm |
>25 µm ≤50 µm |
>50 µm ≤100 µm |
>100 µm |
|---|---|---|---|---|---|---|
| >4 µm(c) ≤6 µm(c) |
>6 µm(c) ≤14 µm(c) |
>14 µm(c) ≤21 µm(c) |
>21 µm(c) ≤38 µm(c) |
>38 µm(c) ≤70 µm(c) |
>70 µm(c) | |
| N particles differential | ||||||
| SAE differential |
| Number of particles per 100 millilitre | Scale number | |
|---|---|---|
| More than | Up to and including | |
| Contamination Levels | >1 µm | >5 µm | >15 µm | >25 µm | >50 µm | >100 µm |
|---|---|---|---|---|---|---|
| >4 µm(c) | >6 µm(c) | >14 µm(c) | >21 µm(c) | >38 µm(c) | >70 µm(c) |
| Contamination Levels | >5 µm ≤15 µm |
>15 µm ≤25 µm |
>25 µm ≤50 µm |
>50 µm ≤100 µm |
>100 µm |
|---|---|---|---|---|---|
| >6 µm(c) ≤14 µm(c) |
>14 µm(c) ≤21 µm(c) |
>21 µm(c) ≤38 µm(c) |
>38 µm(c) ≤70 µm(c) |
>70 µm(c) |