Cleanroom Pressure Differential Dashboard

The default band is 10–15 Pa positive between cleaner and less-clean spaces (EU GMP suggests ~10–15 Pa cascades). Treat it as a sensible starting point — your own specification, regulator, equipment manual or product datasheet sets the authoritative limits, and you can read your true band straight off the worst case those documents allow. Edit the readings against whatever band applies to you.

Because pressure cascade is the real-time barrier, while particle counts are a lagging result. A maintained differential continuously prevents contaminated air from migrating across a door the moment it opens; if the cascade fails, contamination crosses immediately, but particle counts might not reveal it until much later sampling. GMP and containment standards therefore require continuous DP monitoring and alarms on critical doors. Particle counting verifies cleanliness periodically; DP monitoring guards the boundary every second. This dashboard tracks that boundary; a low/zero reading is a containment event to investigate at once.

Match the interval to the consequence and the rate of change: where an excursion spoils product or risks safety, log continuously (or as often as you can sample); where it is merely informative, daily or per-shift spot checks suffice. The in-range % and excursion count only mean something if your sampling is regular — sparse, irregular readings hide the excursions between them.

Yes — every reading is stored in this browser's localStorage on your device and nothing is uploaded to any server, which also makes the dashboard usable on sites with strict data policies. For shared, audit-grade records across a team or for regulatory retention, export the values into your own system.