Indoor Air Quality Sensor
Six sensors. Twelve signals.
A premium home and commercial air-quality sensor that connects indoor readings to outdoor context and turns every change into a clear next step.
Twelve signals
Six sensing elements measure twelve signals, including a computed IAQ index. COâ‚‚ is photoacoustic.
Sensor specifications
| Parameter | Sensor | Range | Accuracy |
|---|---|---|---|
| CO₂ | Sensirion SEN66 · photoacoustic | 400–5,000 ppm | ±50 ppm + 2.5% |
| PM1.0 / 2.5 / 4.0 / 10 | Sensirion SEN66 · laser | 0–1,000 µg/m³ | EPA AQI-aligned |
| VOC Index | Sensirion SEN66 · VOC algo | 1–500 | per Sensirion |
| NOₓ Index | Sensirion SEN66 · NOx algo | 1–500 | per Sensirion |
| Temperature | Sensirion SEN66 | −10–50 °C | ±0.5 °C typ. |
| Relative humidity | Sensirion SEN66 | 0–100% RH | ±4.5% RH typ. |
| Barometric pressure | Bosch BMP390L | 300–1,100 hPa | ±0.5 hPa |
| Ambient light | TI OPT3001 | 0.01–83,000 lx | photopic |
Values reflect the published Terrestream datasheet (temperature rated 15–30 °C, humidity rated 30–70%). Full per-sensor evidence at terrestream.com/evidence.
One color language
The device underglow and the app speak one color language across every signal.
System & connectivity
Power
- USB-C with Power Delivery
- 5 V·3 A / 9 V·2 A / 12 V·1.5 A
- 18 W maximum
Local-first integrations
- Native Home Assistant
- MQTT + local HTTP API
- Matter / Apple Home / Google Home / Alexa via HA Matter bridge
Software
- Web dashboard + mobile app included
- AI insights in plain English
- Privacy-first, local-first data
Compliance, warranty & box
Regulatory: FCC Supplier's Declaration of Conformity (SDoC): compliant; the radio module carries its own FCC ID. Warranty: 1-year limited. Returns: 30 days. In the box: sensor, USB-C cable, power adapter, printed field guide. Shipping: FedEx. Made by Aerodyne Inc., Dover, Delaware, USA.