SEA889 Lorawan Smart Thermostatic Radiator Valve

Unlike open‑loop TRVs that send commands blindly, the SEA889 continuously measures actual valve position against the target. Any deviation is detected and corrected instantly. 0.05mm resolution, ±0.6℃ control accuracy, full‑stroke response ≤20s.

On power‑on, automatically detects and adapts to each valve's unique mechanical stroke limits – defining the precise safe travel range. Eliminates stalling and gear damage, ensures close‑off sealing, and provides the accurate reference for opening‑mode percentage control.

Temperature Mode: MCU runs closed‑loop PID for stable comfort. Opening Mode: valve locks to fixed 0‑100% as commanded – ideal for debugging, hydraulic balancing, or flow limiting. Both rely on stroke self‑learning data.

4×AA batteries deliver 5+ years of operation. For a 1,000‑node commercial building, saves over $80,000 in labor and battery costs over 5 years vs. annual replacements.

868/915MHz Sub‑GHz penetrates concrete and steel. 100m point‑to‑point, 500m+ with gateway. Native MQTT; BACnet/IP via middleware. Plug into Siemens, Honeywell, JCI, or any BMS. Vendor lock‑in eliminated.

Reports temperature, valve opening (0‑100%), motor position, battery, and calibration health – enabling predictive maintenance, drift detection, and carbon accounting. Metal locking nut and anti‑tamper clip prevent removal. Child lock disables all buttons.