Warehouse Humidity Monitoring Dashboard

The default band is below ~65% RH to limit mould, corrosion and caking (60% is a common mould-control ceiling). 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.

Mould generally needs sustained RH above about 65–70% at the material surface to grow, so a warehouse ceiling of 60–65% gives a safety margin. But surface RH can exceed room RH where goods are cold (condensation) or where air is stagnant in a stack — so monitoring room RH is necessary but not sufficient. Combine it with temperature awareness (avoid warm moist air on cold stock), keep air moving, and address roof/wall leaks, which create local damp spots no room-average reading reveals.

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.