The newly published ISO/TR 14644 part 21 provides clarification on the application of sound airborne particle sampling techniques in support of ISO 14644-1:2015 for classification of cleanrooms and clean zones, and ISO 14644-2:2015 for airborne particle monitoring, to provide evidence of cleanroom performance related to air cleanliness by particle concentration.
This blog aims to discuss the science behind these differences, addressing concerns and shedding light on the characteristics of non-volumetric particle counters.
Optical and condensation particle counters are the two main types of particle counters used for detecting and counting aerosol particles. Conventional optical particle counters (OPCs) use light sample cells to detect, count, and measure airborne particles.
Pinpointing a particle source can be a challenge in cleanrooms and laboratory flow equipment where the movement