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Milesight IoT WT401 Wireless Smart Thermostat

SKU: WT401


WT401 is a wireless thermostat defined by its split-unit design, delivering unparalleled installation flexibility. Its broad compatibility empowers you to bring intelligent, unified control to a diverse spectrum of HVAC systems.

Key Features:

  • Broad HVAC compatibility, including furnaces, AC, heat pumps, boilers and PTAC systems
  • 2.7-inch display with PIR presence detection for clear status visibility and energy savings
  • Flexible control via 5 physical buttons with manual or automatic temperature plans
  • Battery powered with multiple power options for wireless or fixed installations
  • NFC and Bluetooth for quick one-touch configuration
  • LoRaWAN support with BMS integration, bulk control and OTA firmware updates

Description

Product Overview

The Milesight WT401 is a compact LoRaWAN water detection sensor built for smart buildings, industrial sites, data centres, kitchens, plant rooms and other environments where early detection of leaks or spills is critical. It communicates over LoRaWAN networks to provide a remote indication of water presence, allowing fast response and prevention of damage. The rugged design and long battery life make the WT401 suitable for ceiling, wall or floor mounting around water-sensitive areas.

Key Features

Reliable Water Detection

  • Detects the presence of water at the sensor surface

  • Suitable for early warning of leaks, spills or flooding

  • Designed to minimise false positives for dependable alerts

LoRaWAN Connectivity

  • Uses LoRaWAN wireless protocol for long-range communication

  • Low power operation supports long battery life for extended deployments

  • Allows remote monitoring via compatible LoRaWAN network servers and platforms

Durable Design

  • Compact housing suited to indoor or semi-protected locations

  • Lightweight and easy to install on walls, floors or near plumbing fixtures

  • Designed for reliable field performance with minimal maintenance

Deployment Flexibility

  • Ideal for kitchens, boiler rooms, plant rooms, basements and server rooms

  • Compatible with smart building automation and IoT monitoring systems

  • Can be integrated with alerting, logging or automated response systems

Applications and Use Cases

The WT401 is suitable for:

  • Water leak detection in commercial buildings

  • Preventing damage in data centres and communication rooms

  • Monitoring around pumps, valves and plumbing infrastructure

  • Early warning systems in industrial facilities and storage areas

  • IoT-based building management systems

Dimensions Drawings

 

 

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More Information

Brand Milesight IoT
Specifications

Wireless Technology

LoRaWAN®

Antenna

Internal antenna

Frequency Bands

IN865, RU864, EU868, US915, AU915, KR920, AS923-1/2/3/4

Transmit Power

16 dBm (868 MHz)

22 dBm (915 MHz)

Sensitivity

-137 dBm

LoRaWAN Mode

OTAA / ABP

Class A / Class C

HVAC Compatibility

Works with most HVAC systems via LoRaWAN®

PTAC (2H/1C), boilers, furnaces, heat pumps (2H/1C) via Milesight UC711 HVAC controller

Radiators via Milesight WT101 / WT102 thermostat

Temperature Control Modes

Heat, Emergency Heat, Cool, Auto

Fan Modes

Low, Medium, High, Auto, On, Circulate

Advanced HVAC Features

Local control schedule

Temperature Sensor

Digital CMOSens® (MEMS)

Temperature Range

-20°C to 60°C

Temperature Accuracy

Typical ±0.2°C

Maximum ±0.5°C

Temperature Resolution

0.1°C

Humidity Sensor

Digital CMOSens® (MEMS)

Humidity Range

0% to 100% RH

Humidity Accuracy

Typical ±2% RH

Maximum ±5% RH

Humidity Resolution

0.5% RH

PIR Detection Angle

120° horizontal, 90° vertical

PIR Detection Distance

Up to 6 m

Display

2.7-inch black and white E-ink screen

Buttons

5 buttons for power, reset, system on/off, temperature up/down, mode selection, fan control

LED Indicator

1 × power/reset indicator

USB Interface

1 × USB Type-C (power supply or console)

Power Connector

1 × 2-pin power terminal connector (PowerBus)

Power On/Off Control

Button or mobile app via NFC

Configuration Methods

Mobile app via NFC or Bluetooth® 5.0

Downlink configuration

Software Features

Occupancy detection

Smart display

Child lock

Button customisation

External sensor mode

Multicast

FUOTA

Power Supply Options

2 × 2700 mAh ER14505 Li-SOCl2 replaceable batteries

AC/DC 24V via power connector

DC 5V via USB Type-C

DC 24V PowerBus via Milesight HVAC controller

Battery Life (Class A)

5.2 years (SF7, EU868)

3.3 years (SF10, EU868)

4.8 years (SF7, US915)

2.7 years (SF10, US915)

Battery Life (Class C)

Approx. 25 days

Operating Temperature

-20°C to 60°C

E-ink screen: 0°C to 40°C

Operating Humidity

0% to 95% RH (non-condensing)

Ingress Protection

IP30

Material & Colour

PC + ABS (UL94 V0), white

Dimensions

86 × 86 × 24 mm

Installation Methods

Wall screw mounting

86 mm square box mounting

European 60 mm round box mounting

118 mm or 120 mm wall box mounting via wall plate accessories

 

Ordering Information

SKU: WT401
Wireless Smart Thermostat

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