Expert Views Cleanroom Differential Pressure… A Small Value with a Big Impact!

Pressure differentials inside cleanrooms are not very large, as Vaisala’s Senior Project Engineer Sean Murphy explains, most are set somewhere between 5-15 Pascal. However, maintaining that differential is a critical part of the overall cleanroom contamination control strategy. These small pressure differences help air move in the right direction; help separate cleaner areas from areas with higher contamination risk and help organizations demonstrate that the environment has remained under control. In short, it is an important measurement for quality, compliance, and production continuity.

Many cleanrooms already monitor pressure. But when the data needs to be reviewed, for example during a deviation investigation, audit preparation, or batch release, the question becomes more specific: can these records clearly show the differential pressure relationship between critical areas? Can they demonstrate that airflow direction was maintained? Can quality and validation teams rely on the data to make a confident decision?

The monitoring method is critical