Milesight WT401 Wireless Smart Thermostat

Milesight WT401 Wireless Smart Thermostat


Battery-powered LoRaWAN® wireless room thermostat with 2.7" E-Ink, onboard temperature/humidity and PIR occupancy. Controls HVAC via a BMS or paired Milesight HVAC controller. More
Manufacturer: Milesight Product code: 99.26.3649.3711

Free UK delivery from 220 GBP; minimum order 140 GBP. Prices are without VAT: UK import VAT and any duty are paid on delivery. All rates: Shipping and payment.

129 GBP excl. UK VAT

Price includes a WEEE recycling fee for the Czech Republic.

Usually ships in 7 days
Battery-powered LoRaWAN® wireless room thermostat with 2.7" E-Ink, onboard temperature/humidity and PIR occupancy. Controls HVAC via a BMS or paired Milesight HVAC controller. More

Price includes a WEEE recycling fee for the Czech Republic.

Manufacturer: Milesight Product code: 99.26.3649.3711

The Milesight WT401-868M is a wireless room thermostat that acts as the control interface for HVAC systems. Rather than switching loads directly, it commands equipment through a BMS or a paired Milesight HVAC controller over LoRaWAN®, and can drive radiators via WT101/WT102. It supports Heat, Emergency Heat, Cool and Auto modes with up to 8 working plans, plus PIR occupancy detection for energy saving.

A 2.7" E-Ink screen shows room status, while onboard CMOSens temperature/humidity sensors and the PIR enable presence-based control. It runs wire-free on two replaceable Li-SOCl₂ batteries (up to ~5 years) or on wired power (24 V AC/DC, USB-C, PowerBus). Configuration is via NFC or Bluetooth 5.0.

Before you install

  • Setup: via the Milesight ToolBox app (NFC).
  • Power: choose one: batteries (ER14505), 24 V, USB-C or Powerbus from an HVAC controller.
  • Control: acts as a room interface: it does not switch loads itself; it pairs with a Milesight HVAC controller or WT101/WT102 heads. Connects via a LoRaWAN gateway (sold separately).

Parameters

Wireless Protocol LoRaWAN®, Class A/C (OTAA/ABP)
Frequency EU868, max. 16 dBm
Function HVAC control via BMS or paired Milesight HVAC controller; Heat/EM Heat/Cool/Auto; 8 plans
Measurement Onboard temp –20…+60 °C ±0.2 °C; humidity 0–100 % RH ±2 %; PIR 120° H × 90° V, up to 6 m
Display 2.7" black & white E-Ink
Configuration NFC via Mobile App, Bluetooth 5.0, Downlink
Power 2 × 2700 mAh Li-SOCl₂ (ER14505), up to ~5 years; or 24 V AC/DC, USB-C, PowerBus
Enclosure PC+ABS (UL94 V0), IP30
Dimensions 86 × 86 × 24 mm
Mounting Wall, 86 mm square or 60 mm round box

Documentation

Safety information

  • Read the manufacturer's user guide supplied with the product before installation and keep it.
  • Use the product only for its intended use and within the operating conditions stated by the manufacturer. Do not use a visibly damaged product.
  • Replace the batteries only with the type given in the documentation and insert them with the correct polarity (+ and −).
  • Never recharge primary (non-rechargeable) cells. Do not short-circuit, open, crush or heat batteries and do not throw them into fire.
  • Keep batteries out of the reach of children.
  • A damaged or leaking battery can overheat or catch fire: take it out of service and do not touch leaking electrolyte.
Manufacturing company XIAMEN MILESIGHT IOT CO.,LTD.
Address 401, Building No.37, Xixishanwei Road, Software Park Phase III, Torch Development Zone for High Technology Industries, Xiamen, China
Email [email protected]
Responsible person in the EU HARDWARIO a.s.
Address of the responsible person in the EU U Jezu 525/4, 460 01 Liberec, Czech Republic
E-mail of the responsible person in the EU [email protected]
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