Cleanroom Classifications

Cleanroom Classifications

There are a variety of factors involved when it comes to determining cleanroom classification, and every industry has its own default standard to start with. A cleanroom is a space that is specifically designed to keep the outside environment from getting in. Once a cleanroom space has been constructed, there are two things that can lead to contamination: the people and the process.

There are three main questions to ask yourself in order to determine what classification your cleanroom application should be, including:

What are the main sources of contamination in my cleanroom?

What size particles do I need to filter out?

How much air do I have to circulate in my cleanroom to help get contaminants out?

How Does Particle Size Impact Classifications?

If you’re wondering how particle size impacts cleanroom classifications, we’re here to catch you up to speed. As we mentioned above, one of the first questions to ask yourself is, what size particle do I need to filter out?

In the cleanroom environment, air particles are measured in microns. One micron is equal to one-millionth of a meter. Most of the time, micron-sized particles are smaller than a living cell and can only be seen with state-of-the-art microscopes. To put this into better perspective, consider the bullet below.

One strand of human hair can vary in width from approximately 20 to 180 microns.

A small dust particle that can be seen in a ray of sun equates to roughly 60 microns.

The human eye cannot consistently see objects or particles less than 50 microns in size.

Pollen is often between 30 to 50 microns.

Bacteria can be between 2 to 10 microns in size.

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