A clean room is an environment free from dust and other contaminants. Typically used in manufacturing or scientific research, a clean room is a controlled environment that has a low level of pollutants such as dust, airborne microbes, aerosol particles, and chemical vapors. To be exact, a clean room has a controlled level of contamination that is specified by the number of particles per cubic meter at a specified particle size. The ambient air outside in a typical city environment contains 35,000,000 particles per cubic meter, 0.5 mm and larger in diameter, corresponding to an ISO 9 clean room which is at the lowest level of clean room standards.
Clean Room Classifications
Clean rooms are classified by how clean the air is, specifically the number and size of particles permitted per volume of air. Personnel selected to work in clean rooms undergo extensive training in contamination control theory. They enter and exit the clean room through airlocks, air showers, and/or gowning rooms, and they must wear special clothing designed to trap contaminants that are naturally generated by skin and the body.
The first clean room was developed in the 1960’s.
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