Hydac FCU 1310 - ISO 4406 Overview Table

Appendix
ISO 4406 overview table
Allocation of particle counts to cleanliness codes:
Number of particles / 100 ml Number of particles / 100 ml
Class More than Up to (and
including)
Class More than Up to (and
including)
0
0 1
15
16,000 32,000
1
1 2
16
32,000 64,000
2
2 4
17
64,000 130,000
3
4 8
18
130,000 250,000
4
8 16
19
250,000 500,000
5
16 32
20
500,000 1,000,000
6
32 64
21
1,000,000 2,000,000
7
64 130
22
2,000,000 4,000,000
8
130 250
23
4,000,000 8,000,000
9
250 500
24
8,000,000 16,000,000
10
500 1,000
25
16,000,000 32,000,000
11
1,000 2,000
26
32,000,000 64,000,000
12
2,000 4,000
27
64,000,000 130,000,000
13
4,000 8,000
28
130,000,000 250,000,000
14
8,000 16,000
Note that increasing the measurement reference by 1 causes the particle
count to double.
Example: ISO code 18 / 15 / 11 means:
Cleanliness class
Particle count / 100 ml
Size ranges
18
130,000 – 250,000
> 4 µm
(c)
15
16,000 – 32,000
> 6 µm
(c)
11
1,000 – 2,000
> 14 µm
(c)
Contained in 100 ml of the analyzed sample.
FCU1310
en(us)
Page 114 / 124
BeWa FCU1310 V300 3371346f en-us 2017-01-27.docx 2017-01-27