Paint Booth Humidity & Temperature Dashboard

The default band is 40–70% RH for most automotive/industrial coatings (check the paint TDS — waterborne is fussier). 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.

Solvent-borne clears can 'blush' — a milky haze — when high humidity lets moisture condense into the fast-evaporating, cooling film; waterborne basecoats stay tacky because humid air can't carry away the water that must flash off before clearing. Fixes: bring booth RH and temperature into the paint's TDS window (dehumidify or heat), switch to a slower 'anti-blush' reducer on humid days for solvent systems, and ensure adequate airflow and bake temperature. Monitoring proves whether the booth, not the painter, is the problem.

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.