Specifications

ContaminationSensor CS 1000 Cleanliness classes - brief overview
HYDAC FILTER SYSTEMS GMBH
en(us)
Page 98/112
BeWa CS1000 3764916 300 en-us 2012-08-29.doc 2012-08-29
Cleanliness class - SAE AS 4059
Like ISO 4406, NAS 4059 describes particle concentrations in liquids. The analysis
methods can be applied in the same manner as ISO 4406:1999.
An additional feature in common with ISO 4406:1999 is that cleanliness classes are
grouped on the basis of cumulative number of particles (i.e. all particles that are
larger than a certain limit value are >4 µm, for example).
As opposed to ISO, SAE AS 4059 uses different limit values among the various
particle sizes for contamination classes.
For this reason, the corresponding designation of the particle size being examined
always has to be added, e.g.:
AS 4059 class 6B
-> 9731 – 19500 particles >6 µm
AS 4059 class 8A/7B/6C -> 3-value ISO code >4µm/>6µm/>14µm
If an SAE class is given acc. to AS 4059 without a letter, then it is always particle
size B (> 6 µm).
The following table shows the cleanliness classes in relation to the particle
concentration determined:
Table - SAE AS 4059
Maximum particle count / 100 ml
Size ISO 4402 > 1 µm > 5 µm > 15 µm > 25 µm > 50 µm > 100 µm
Size ISO 11171 > 4 µm
(c)
> 6 µm
(c)
> 14 µm
(c)
> 21 µm
(c)
> 38 µm
(c)
> 70 µm
(c)
Size coding A B C D E F
000 195 76 14 3 1 0
00 390 152 27 5 1 0
0 780 304 54 10 2 0
1 1,560 609 109 20 4 1
2 3,120 1,220 217 39 7 1
3 6,250 2,430 432 76 13 2
4 12,500 4,860 864 152 26 4
5 25,000 9,730 1,730 306 53 8
6 50,000 19,500 3,460 612 106 16
7 100,000 38,900 6,920 1,220 212 32
8 200,000 77,900 13,900 2,450 424 64
9 400,000 156,000 27,700 4,900 848 128
10 800,000 311,000 55,400 9,800 1,700 256
11 1,600,000 623,000 111,000 19,600 3,390 512
Classes
12 3,200,000 1,250,000 222,000 39,200 6,780 1,020