LoRaWAN® VS351 Radar & Thermopile People Counter Sensor – Milesight
General Description
Milesight 's VS351 sensor is a smart people counter based on radar technology (for battery-powered version) combined with a thermopile sensor. Designed for ceiling or lintel installation, it accurately detects bi-directional passages, filters U-turns, and distinguishes between side-by-side passages. It communicates via LoRaWAN® or D2D and offers power options via USB Type-C or batteries (depending on the version).
Targeted Applications
- Flow analysis in shops, offices or public buildings
- Real-time occupancy and access management
- Energy optimization by occupancy detection
- Anonymous counting with respect for privacy
Highlights
- Hybrid technology: radar (battery version) + thermopile
- Accuracy rate up to 95% (up to 99% for a single individual)
- U-turn filtering, bidirectional counting, side-by-side differentiation
- Easy installation on ceiling or lintel
- LoRaWAN® and Milesight D2D compatible
- Local storage, data retransmission, 1.6 year battery life (battery version)
Technical Specifications
| Measures |
| Technology |
Radar (battery version) + Thermopile |
| Installation height |
2.5 m to 3.0 m |
| Detection zone |
5.55 m × 2.30 m @ 3 m |
| Adjustable sensor angle |
0° to 90° |
| Precision |
Up to 95% (99% for single person) |
| Optimal operating temperature |
15°C to 30°C |
| Measured temperature |
-30°C to +70°C, accuracy ±2°C |
| Transmission |
| Protocols |
LoRaWAN®, Milesight D2D |
| Supported frequencies |
CN470 / IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923-1/2/3/4 |
| Transmit power |
16 dBm (868 MHz), 20 dBm (470 MHz), 22 dBm (915 MHz) |
| Sensitivity |
-137 dBm |
| Fashion |
OTAA / ABP – Class A |
| Operation & Configuration |
| Button |
1 Reset button (internal) |
| Configuration |
Via NFC mobile application |
| Advanced functions |
Storage, forwarding, retrieval, D2D Controller |
| Physical Characteristics |
| Food |
Type-C: 5V/1A | Battery: 4 × ER26500 (9000 mAh) |
| Battery life |
≈ 1.6 years (30 min interval, 1000 people/day) |
| Operating temperature |
-20°C to +60°C |
| Relative humidity |
0% to 95% (non-condensing) |
| Protection index |
IP30 |
| Dimensions |
Type-C: 70 × 68 × 32 mm Battery: 188 × 68 × 32 mm |
| Material / Color |
PC (flame retardant), white |
| Facility |
Ceiling or lintel mounting |
Interfaces and Connectors
The VS351 sensor can be configured via NFC and powered by USB Type-C or replaceable batteries depending on the version. It transmits data via LoRaWAN® or D2D.
Pack Contents
- 1 × Milesight VS351 Sensor
- 4 × ER26500 Batteries (Battery version only)
- 1 × Ceiling/lintel fixing kit
- 1 × Quick Start Guide