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Classification Of Cleanliness Grades

Classification Of Cleanliness Grades


The development of clean room is closely linked with modern industry and cutting-edge technology.

At present, it has been widely used and mature in industries such as biopharmaceuticals, medical and health care, food daily chemicals, electronic optics, energy, and precision instruments.


Air cleanliness class (air cleanliness class): The class standard for dividing the maximum concentration limit of particles greater than or equal to the considered particle size in a unit volume of air in a clean space.


The cleanliness and the continuous stability of pollution control are the core standards for testing the quality of the clean room. The standard is divided into several levels according to the regional environment, cleanliness and other factors.


Approximate comparison table of cleanliness grades in various countries

The first is that the schema of the class definition is as follows:

Class X (at Y μm )

Where X is the grade of the clean room, such as 100 or 10000, etc., and Y is the particle size such as 0.2μm, 0.5μm, etc., you can check. This means that the user specifies that the clean room particle content, at these particle sizes, must meet the limits of the class. This can reduce disputes, here are a few examples:

Class1 (0.1μm, 0.2μm , 0.5μm)

Class 100(0.2μm , 0.5μm )

Class 100(0.1μm, 0.2μm , 0.5μm )

In Classes 100 (M3.5) and Greater (Class 100, 1000, 10000....), generally look at one particle size. In Classes Less than 100 (M3.5) (Class 10, 1.... ), it generally depends on a few more particle sizes.


Cleanroom Case Atlas


Nucleic acid testing laboratory

Pharmaceutical laboratory ISO7

Mask production cleanroom ISO8

Suzhou Pharma Machinery Co.,Ltd.



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