Cleanroom Classification
Cleanrooms are classified by the ISO standard, which defines the allowable concentration of airborne particles per cubic meter of air. The classification ranges from ISO Class 1 (the cleanest) to ISO Class 9 (least clean).
How to Choose Your Cleanroom Classification?
Each industry has particular ISO standards. However, it is advised to always align ISO class with both regulatory expectations and process risk level.
Maximum number of particles in micrometers (µm) permitted per cubic meter of air.
ISO Class 110 particles of 0.1 µm |
ISO Class 2100 particles of 0.1 µm |
ISO Class 31,000 particles of 0.1 µm |
ISO Class 410,000 particles of 0.1 µm |
ISO Class 5100,000 particles of 0.1 µm |
ISO Class 61 million particles of 0.1 µm |
ISO Class 7352,000 particles of 0.5 µm |
ISO Class 83.52 million particles of 0.5 µm |
ISO Class 935.2 million particles of 0.5 µm |