Passive infrared motion sensor WS203

high-precisionwirelesswall-mounted

Overview
The WS203 is a LoRaWAN® PIR motion sensor with integrated temperature and humidity measurement for indoor environmental and occupancy monitoring. It detects human or animal movement and provides high-precision temperature and humidity readings, with local data storage and retransmission to ensure data integrity during connectivity interruptions.

Key Features

• PIR motion detection with adjustable covers: up to 120° horizontal × 100° vertical, max 6 m range
• High-precision temperature and humidity sensing for reliable environment monitoring
• Local data storage (up to 1,000 records) and automatic retransmission after reconnection
• Milesight D2D (Device-to-Device) support for direct node communication
• Ultra-low power design with internal 4000 mAh ER18505 Li-SOCl2 battery for multi-year operation in typical reporting scenarios
• NFC-based configuration via mobile app and simple mounting options for quick deployment

Milesight D2D Communication

• Enables direct communication among Milesight LoRa node devices without a LoRaWAN® gateway
• Lower latency and sub-second response in typical scenarios
• Secure local transmission and reduced infrastructure cost for specific automation use cases

Motion Detection

• Technology: Passive Infrared (PIR)
• Coverage: 120° horizontal × 100° vertical
• Range: up to 6 m
• Adjustable detection zones using interchangeable PIR covers

Temperature & Humidity Sensing

• Temperature range: -20 °C to +60 °C; accuracy: typ. ±0.3 °C (-20 °C to 0 °C), ±0.2 °C (0 °C to 60 °C); resolution: 0.1 °C
• Humidity range: 0% to 100% RH; accuracy: typ. ±2% RH (25 °C); resolution: 0.5% RH

Data Integrity & Storage

• Local historical storage up to 1,000 timestamped records
• Continues to collect and store data when offline and retransmits stored records after reconnection

Power & Battery

• Internal power: 1 × 4000 mAh ER18505 Li-SOCl2 battery
• Example battery life (30 min report + 64 triggers/day, LED off, 25 °C): ~10.7 years (SF7, EU868); ~5.4 years (SF10, EU868); ~10.8 years (SF7, US915); ~5.2 years (SF10, US915)

Configuration & Installation

• NFC configuration with mobile app (Milesight ToolBox) for wireless setup and template provisioning
• Mounting: 3M tape or wall screw; interchangeable PIR covers for adjustable detection angles

Integration & Cloud

• Compliant with standard LoRaWAN® gateways and network servers
• Integrates with device/cloud management platforms for dashboards, alerts and remote management

Typical Applications

• Smart office: occupancy-based HVAC and lighting control
• Healthcare: indoor environment monitoring in patient rooms and wards
• Smart farming / animal husbandry: monitor indoor temperature and humidity to support animal welfare

Technical specifications

• Model: WS203
• Wireless: LoRaWAN®, Milesight D2D
• Antenna: Internal
• Frequency bands: 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)
• Receiver sensitivity: -137 dBm
• LoRaWAN mode: OTAA / ABP Class A
• PIR detection: 120° × 100°, up to 6 m; interchangeable covers for angle adjustment
• Temperature: -20 °C to +60 °C; accuracy typ. ±0.3 °C (-20 °C~0 °C), ±0.2 °C (0 °C~60 °C); resolution 0.1 °C
• Humidity: 0%~100% RH; accuracy typ. ±2% RH (25 °C); resolution 0.5% RH
• Local storage: up to 1,000 records
• Button: 1 × internal Power/Reset
• LED: 1 × status indicator
• Configuration: NFC mobile app or LoRaWAN downlink
• Power: 1 × 4000 mAh ER18505 Li-SOCl2 battery (internal)
• Operating temperature: -20 °C to +60 °C
• Relative humidity: 0% to 95% (non-condensing)
• Dimensions: 73 × 73 × 26 mm (without PIR cover)
• Weight: 89.6 g (battery included)
• Ingress protection: IP30
• Material & color: PC + ABS (UL94 V0), white/grey
• Mounting: 3M tape or screw
• Approvals: CE, FCC; Environmental: RoHS