Specifications

74
Percent contamination vs. PPM (parts per million)
Percent PPM
100% 1,000,000
10% 100,000
1% 10,000
0.1% 1,000
0.01% 100
0.001% 10
Volume
1 litre = 1 000 ml
1 PPM = 1 µl in 1 litre
Example 1
400 PPM in 1 litre = 400 µl
Example 2
A reading of 250 PPM equates to a quantity of absorbed water in a 400 litre
capacity system of 0.1 litre.
ISO/NAS/SAE Code Comparison Table
The comparisons relate to particle count data only. To conform to any particular standard,
reference should be made to the recommended experimental procedure.
ISO/DIS 4406
BS 5540/4 codes
Defence Std. 05/42
NAS 1638 SAE 749
Table A Table B
13 / 11 / 08 2
14 / 12 / 09 30
15 / 13 / 10 41
16 / 14 / 09 400F
16 / 14 / 11 52
17 / 15 / 09 400
17 / 15 / 10 800F
17 / 15 / 12 63
18 / 16 / 10 800
18 / 16 / 11 1300F
18 / 16 / 13 74
19 / 17 / 11 1300 2000
19 / 17 / 14 85
20 / 18 / 12 2000
20 / 18 / 13 4400F
20 / 18 / 15 96
21 / 19 / 13 4400 6300F
21 / 19 / 16 10
22 / 20 / 13 6300
22 / 20 / 17 11
23 / 21 / 14 15,000
23 / 21 / 18 12
24 / 22 / 15 21,000
25 / 23 / 17
100,000
PPM Conversion Table