NTC thermostat WT10 series

electronicprogrammablevalve-mountable

Overview
The WT10x Smart Radiator Thermostat (WT101 & WT102) is a LoRaWAN® thermostatic radiator valve (TRV) family engineered for precise room-by-room temperature control, energy optimisation and scalable deployment. WT101 is battery-powered; WT102 uses thermoelectric energy harvesting and includes a Type-C port for charging or external sensors. Key functions include integrated high-precision NTC sensing, automatic schedules, open-window detection, freeze protection and wide valve compatibility.

Key Features

• High-precision NTC temperature sensing: 0.1°C resolution, ±0.5°C accuracy (0–50°C).
• Independent room control for zone-based comfort and energy savings.
• Automatic valve opening limit and maximum flow regulation to prevent overheating.
• Smart scheduling: up to 16 customizable heating plans per period for pre-heating and setback strategies.
• Open-window detection to halt heating during sudden temperature drops.
• Automatic freeze protection to protect piping at low temperatures.
• Remote management via LoRaWAN®: centralized control, FUOTA firmware updates and bulk commands for zero-touch maintenance.
• NFC one-touch commissioning with the Milesight ToolBox mobile app.

Deployment & Management

• LoRaWAN® communication (OTAA/ABP, Class A; WT102 optionally supports Class B for faster downlinks).
• Suited to large buildings, hotels, multi‑unit residences, campuses and retrofit projects requiring long range, low power and high device density.
• FUOTA support for remote firmware distribution at scale.
• NFC-based local configuration and WT102 Type-C for charging, external NTC sensor or backup power.

WT102 Exclusive

• Thermoelectric energy harvesting enables maintenance-free operation under suitable hydraulic conditions; Type-C input for charging or external sensor connection.
• Designed for long-term commercial deployments with reduced maintenance needs (no regular battery replacement).
• Optional LoRaWAN® Class B support for near-instant remote actuation and improved integration with synchronous controllers.

Local Use, Security & Protection

• Interactive LED status and temperature display for local readout.
• Child lock to prevent manual override when enabled.
• Anti-theft/tamper options including tamper alarm and theft-deterrent collar accessory.
• Optional rugged metal housing (WT102) for enhanced durability in public areas.

Connectivity & Ecosystem

• Integrates with the Milesight LoRaWAN® ecosystem (Gateways, DeviceHub / IoT Cloud) for centralized monitoring and analytics.
• Open-protocol support enables BMS integration (BACnet over LoRaWAN®), Modbus and MQTT via Milesight controllers/platforms.
• Can be combined with other Milesight devices (e.g. WT401, IAQ sensors, magnetic contacts) to automate HVAC logic: stop heating when windows open, coordinated zone control, pre-heat before occupancy.

Technical specifications

• Series / Model: WT10x (WT101 battery-powered; WT102 self-powered / Type-C)
• Wireless: LoRaWAN® (OTAA/ABP). WT102: optional Class B; WT101: Class A
• Frequencies: EU868, US915, AS923, CN/others (regional variants)
• Tx power / Sensitivity: typical LoRa values; sensitivity ~-137 dBm
• Valve actuator: stepping motor
• Default fitting: M30 × 1.5 mm; adapters available for RA/RAV/RAVL/Giacomini/M28 (Comap, Herz, TA) and common valve types
• Temperature sensor: NTC; range -20 °C to 60 °C; resolution 0.1 °C; accuracy ±0.5 °C (0–50 °C)
• Functions: up to 16 schedules per period, open-window detection, freeze protection, valve limit, child lock, tamper alarm, multicast, FUOTA
• Configuration: NFC via Milesight ToolBox app and LoRaWAN downlink
• Local interface: white LED display, control knob/buttons; WT102 includes USB Type-C for power/charging/external NTC
• Power WT101: 2 × 1.5V Li-FeS2 AA replaceable (≈3000 mAh total). Estimated life up to ~8 years (EU868, SF7, lab guideline)
• Power WT102: thermoelectric harvesting when hydraulic conditions met; Type-C 5V input available
• Physical: WT101 Ø52 × 90 mm (≈170 g with batteries); WT102 ≈50 × 60 × 101.9 mm; Materials: Stainless + ABS (WT101) / PC + Aluminum (WT102)
• Environment: Operating -20 °C to +60 °C; Humidity 0–95% non‑condensing; IP30
• Approvals: CE; RoHS compliant
• Data: local storage and retransmission; up to ~1,000 stored entries (model-dependent)