Resources
Glossary

Differential particle counts

Particle counters display readings in two columns: differential (depicted by ∆ delta) and cumulative (depicted by ∑ sigma).

The differential total shows the counts which are at least that size in diameter and up to, but not including the next size.

The cumulative total shows the amount of particles that were found at that size and greater.

Need support?

Looking for more information? Contact one of our cleanroom experts!

Email icon Phone icon Web icon
CONTACT US

Related articles

You may also find these arictles useful:

Last updated:

Cleanroom Services

We don’t just design and build high quality critical environments; our expertise extends into a comprehensive array of cleanroom services.

OUR SERVICES
Our GMP Team

See our latest projects!

Our case studies demonstrate successful collaborations with clients across the globe!

CASE STUDIES