Parking Garage Carbon Monoxide Dashboard

The default band is below ~35 ppm CO sustained (ventilation typically ramps at 25–35 ppm; codes set alarm/evac levels). 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.

Completely different hazards. CO₂ (carbon dioxide) is a ventilation proxy that's only dangerous at very high levels — we monitor it for comfort and air quality. CO (carbon monoxide) is an acutely toxic gas from incomplete combustion (engines, faulty heaters) that binds to blood haemoglobin and kills at concentrations far lower than CO₂ becomes a problem. Garages, plant rooms and anywhere with engines or combustion need CO detection as life safety, typically with code-set alarm thresholds and fan interlocks. Never substitute a CO₂ monitor for a CO detector — they measure different gases for different reasons.

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.