Vacuum Level Monitoring Dashboard

The default band is below ~50 mbar for many rough-vacuum processes (process-specific — set your target absolute). 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.

Run a rate-of-rise test to tell them apart. Pump down, isolate the chamber from the pump, and watch the pressure: a fast linear rise means a real leak (air getting in — find it with a leak detector, soap, or helium); a slow rise that tapers off suggests outgassing or a virtual leak (trapped gas, moisture, a slow-desorbing surface), often fixed by bake-out or longer pumping. If the system can't even reach base pressure with the pump running and no leak, the pump itself is worn (vanes, oil, or worn rotor clearances). Trending ultimate vacuum here flags pump decline early.

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.