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Products > Filter Division Products > Desorbers > D38 Desorber > ISO Code Chart

ISO 4406 - Standard for Particle Counting in Oil

Number of Particles per ml

ISO Code

More Than Up to & Including
80,000
40,000
20,000
10,000
5,000
2,500
1,300
640
320
160
80
40
20
10
5
2.5
1.3
0.64
0.32
0.16
0.08
0.04
0.02
0.01
0.005
0.0025
160,000
80,000
40,000
20,000
10,000
5,000
2,500
1,300
640
320
160
80
40
20
10
5
2.5
1.3
0.64
0.32
0.16
0.08
0.04
0.02
0.01
0.005
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
00

The ISO 4406 code specifies either two or three size ranges for particles.  Either one looks at 5 and 15 micron particles or 2, 5 and 15 micron particles. The ISO code number refers to the number of particles per 1 ml of oil in larger than each size range. The ISO Code is written with a backslash between the numbers (e.g. 14/12/7), with the >5 (or >2) micron scale number first.

See the Examples Below:

2 Code Particle Count (5 and 15 micron)

Size Count Scale
>5 3620 19
>15 28 12

ISO Code = 19/12

3 Code Particle Count (2, 5 and 15 micron)

Size Count Scale
>2 11893 21
>5 3620 19
>15 28 12

ISO Code = 21/19/12

 

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