Contamination Classification
Cleanliness Classes (CC) acc. to ISO 4406 and NAS 1638
Contamination Classification acc. to NAS 1638-01/1964
(Extended to particle range 2 – 5 µm)
* Dirt content acc. to ACFTD (Air Cleaner Fine Test Dust)
Acc. to ISO 4406: 1987/1999
* Dirt content acc. to ACFTD (Air Cleaner Fine Test Dust)
