ISO/TR 14644 -21:2023 Cleanrooms And Associated Controlled Environments — Part 21: Airborne Particle Sampling Techniques.

Airborne particle sampling remains a cornerstone of cleanroom compliance, yet applying technical standards often leads to common misunderstandings—particularly regarding tubing length and probe placement. With recent regulatory updates, professionals face a renewed need to differentiate between classification requirements and routine monitoring practices. Navigating these complexities requires a clear understanding of how to sample effectively without introducing bias, especially when handling particles smaller than 5.0 μm. Misinterpreting standards can lead to inaccurate data, potentially compromising the integrity of controlled environments. By clarifying the application of particle counters and providing structured guidance on sampling configurations, teams can ensure their monitoring programs are both defensible and precise. Download the full application note to explore these methodologies and refine your facility’s sampling strategy to meet the latest regulatory expectations.