Guitar & Instrument Room Humidity Dashboard

The default band is 45–55% RH (≈45–50% ideal) for acoustic guitars and other wooden instruments. 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.

Early signs: sharp fret ends poking out the neck edge, a sunken or concave top, lowered action and a lifeless tone. Caught early, gentle rehumidification (a case humidifier, slowly over days) reverses most of it as the wood reabsorbs moisture. But once the top actually cracks or a brace lets go, that's a repair, not a recovery. The whole point of monitoring is to catch the falling RH and the early symptoms before a crack — solid-wood instruments are far more vulnerable than laminate ones.

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.