![Understanding the ISO Cleanliness Code Understanding the ISO Cleanliness Code](https://oil-testing.com/wp-content/uploads/2019/06/Understanding-the-ISO-Cleanliness-Code.png)
Particle count results are assigned three ISO code numbers based on the total number of particles equal to or greater than a given size range.
In this technical resource you'll:
- Learn more about the ISO cleanliness code
- Gain valuable insights on particle distribution