Hardware 5 min read· Updated May 2, 2026
What Each Sensor Measures
A reference for the seven core measurements: T, RH, CO₂, VOC, L, M, V.
Every SenseStack device exposes a consistent set of measurements. The labels below appear throughout the dashboard.
| Code | Measurement | Unit | Use |
|---|---|---|---|
| T | Temperature | °C | Primary readiness signal |
| RH | Relative humidity | % | Sauna comfort and air condition |
| CO₂ | Carbon dioxide | ppm | Ventilation quality |
| VOC | Volatile organic compounds | index | Air quality |
| L | Water level | OK / low | Plunge fill state |
| M | Motion | active / idle | Session detection |
| V | Battery / supply | % | Power health |