Milesight
WT101 Smart Radiator Valve (TRV)
Learn more about heating control →Heating
Temperature
Heating
What It Does
Built for heating.
A smart radiator valve (TRV) — room-by-room heating control over LoRaWAN, with a five-year battery and ±0.5°C accuracy. The unit that turns a heating bill into a managed cost. LoRaWAN decoder: Milesight WT101 payload decoder & codec (GitHub)
Highlights
Room-by-room control
Sets a target temperature at each radiator independently over LoRaWAN — eliminating the over-heated corridors and under-heated classrooms that come with a single zone heating schedule.
Up to eight-year battery
Two replaceable AA cells last up to eight years at a ten-minute interval, so a whole-building valve rollout does not become an annual maintenance programme.
Fits existing radiators
Ships with an M30 × 1.5 mm fitting as standard and adapters for Danfoss RA/RAV/RAVL, Giacomini, Comap, Herz and TA — covering the vast majority of radiator valves already installed in UK public-sector stock.
Specification
Datasheet (PDF) ↓- Actuator
- Stepping motor
- Default valve fitting
- M30 × 1.5 mm
- Optional adapters
- RA, RAV, RAVL (Danfoss), Giacomini, M28 (Comap, Herz, TA)
- Temperature sensor type
- NTC
- Temperature range
- −20 °C to 60 °C
- Temperature accuracy
- ±0.5 °C (0–50 °C)
- Temperature resolution
- 0.1 °C
- Advanced features
- Automatic temp control, valve opening control, heat plans, freeze protection, open-window detection, tamper alarm
- LoRaWAN frequency
- IN865 / RU864 / EU868
- LoRaWAN mode
- OTAA / ABP, Class A
- Battery
- 2 × 1.5 V Li-FeS₂ AA replaceable (3000 mAh total)
- Battery life
- ~8 years (SF7, EU868) / ~5 years (SF10, EU868); 10-min interval + 1 control/heating season
- Operating temperature
- −20 °C to +60 °C
- IP rating
- IP30
- Dimensions
- Ø52 × 90 mm
- Weight
- 170 g (with batteries)
- Certifications
- CE, RoHS
- SKU
- WT101-EU868
Complete The Setup
You will also need a gateway.
Every LoRaWAN sensor needs a gateway to reach the internet. One gateway covers a whole building — the Milesight UG65 is the standard choice for most sites.
On The Platform
A device on its own, or part of the bigger picture.
Buy this device and run it yourself, or have it monitored on the Planetic platform — live dashboards, standards tracking and automatic alerts, with the compliance evidence kept for you.
Questions
Good to know.
- Do I need anything else to use this device?
- Every LoRaWAN sensor needs a gateway to reach the internet. One gateway covers a whole building — the Milesight UG65 is the standard choice for most sites. The gateway itself does not need a sensor to run.
- Is the price ex VAT?
- Yes — all prices shown are ex VAT. VAT is added at checkout where applicable.
- Can I have it monitored on the Planetic platform?
- Yes. Buy the device outright and run it yourself, or have it monitored on Planetic — live dashboards, standards tracking and automatic alerts, with compliance evidence kept for you.
Get Started
Ready to order, or want to talk it through?
Add it to your cart for checkout, or book a call and we will confirm quantities and the gateway you need for the building.