Milesight WS203 LoRaWAN® Motion, Temperature & Humidity Sensor (EU868)

Milesight WS203 LoRaWAN® Motion, Temperature & Humidity Sensor (EU868)

• Sensitive Motion Detection
• Adjustable Detection Angles
• High-Precision Temperature and Humidity Detection
• High Data Integrity with Storage and Retransmission
• Milesight D2D Communication
• Ultra-Low Power Consumption
• Easy Deployment and Installation

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Product Description

The Milesight WS203 is a sophisticated sensor device that combines motion detection with temperature and humidity monitoring (TH). This versatile sensor is ideal for environmental monitoring in various settings, including homes, offices, and other indoor spaces. The WS203 utilizes passive infrared (PIR) technology to detect motion within an 8-meter range, making it highly effective for ensuring comfort and energy efficiency in occupied spaces.

Key Features

  • Motion and Temperature/Humidity Sensing: Integrates PIR-based motion detection with accurate temperature and humidity measurement.
  • LoRaWAN Region Compatibility: Supports various LoRaWAN regional frequencies, making it suitable for global use.
  • Range of Detection: Capable of detecting motion within an 8-meter radius.
  • Battery Powered: Operates on a 1650 mAh ER14335 Li-SOCl2 battery, ensuring long-term use.
  • Wireless Transmission: Employs LoRaWAN® technology for efficient, long-range data communication.
  • Operating Conditions: Functions effectively in temperatures from -20°C to +60°C, and relative humidity ≤90% (non-condensing).
  • Ingress Protection: Rated IP30, suitable for indoor environments.
  • Dimension and Material: Compact size (50 × 50 × 23.8 mm) and made of anti-flaming polycarbonate.
  • Installation Options: Can be mounted on flat surfaces using screws or 3M tapes.
  • Regulatory Compliance: Meets CE, FCC, and RoHS standards.


  • Environmental Monitoring: Ideal for monitoring and controlling indoor environmental conditions.
  • Smart Building: Enhances building automation systems for energy efficiency and comfort.
  • Occupancy Detection: Useful in automating lighting and HVAC systems based on occupancy.

The Milesight WS203 is a high-performance sensor that offers precise motion detection along with temperature and humidity monitoring, suitable for a wide range of indoor applications​.

Product Video


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Wireless Transmission
Technology LoRaWAN®, Milesight D2D
Frequency CN470/IN865/EU868/RU864/US915/AU915/KR920/AS923-1&2&3&4
Tx Power 16 dBm (868 MHz)/20 dBm (915 MHz)/19 dBm (470 MHz)
Sensitivity -137 dBm
Mode OTAA/ABP Class A
Detection Area 120 ° Horizontal, 100 ° Vertical
Detection Distance Maximum 6 m
Range -20°C ~ 60°C
Accuracy ± 0.2°C
Resolution 0.1°C
Range 0% ~ 100% RH
Accuracy ± 2% RH
Resolution 0.5% RH
Button 1 x Power/Reset Button (Internal)
LED Indicator 1 × Status Indicator
Configuration NFC Configuration via Mobile App
Advanced Feature Milesight D2D Controller, Data Storage, Data Retransmission
Physical Characteristics
Power Supply 1 × 4000 mAh ER18505 Li-SOCl2 Battery
Battery Life* Up to 5 years (30 min Interval + 64 Triggers per Day, 25°C)
Operating Temperature -20°C to +60°C
Relative Humidity 0 to 95% (Non-condensing)
Dimension 73 x 73 x 26 mm ( 2.87 x 2.87 x 1.02in) (Without PIR Cover)
Ingress Protection IP30
Color & Material White + Grey, PC + ABS (Flame Retardant)
Installation 3M Tape Mounting, Wall Screw Mounting

Shipping Policy

We provide worldwide shipping using reliable tracked
shipping services.

Local Shipments within Cyprus

Shipments in Cyprus are performed usually with ACS Courrier
or AKIS Express. In some cases, we might deliver the products ourselves. A pick-up
option from our locations is also available.

International Shipments

International shipments are performed using Express Airway
Shipping Services. We are currently shipping orders with TNT Express and FedEX.
As soon as your shipment is dispatched you will receive the shipment confirmation
including the shipment tracking number which you can use to track your order
from the shipment provider website.

We dispatch orders within 1-3 workdays after the day of the
order placement. 

General Return Policy

We have a 30-day return policy, which means you have 30 days
after receiving your item to request a return.

To be eligible for a return, your item must be in the same
condition that you received it, unworn or unused, with tags, and in its
original packaging. You’ll also need the receipt or proof of purchase.

To start a return, you can contact us at If
your return is accepted, we’ll send you a return shipping label, as well as
instructions on how and where to send your package. Items sent back to us
without first requesting a return will not be accepted.

For any further information, help and support regarding the
shipping and/or return process you can contact us at:

  • Email:
  • Telephone: +357 22 282828