VS351

In Stock

Mini AI Thermopile People Counter

Thermopile and radar fusion for accurate, anonymous bi-directional counting.

Features

  • Bi-directional people counting
  • AI accuracy up to 90%
  • Thermopile and radar fusion
  • 100% anonymous, GDPR compliant
  • Milesight D2D, gateway-free control
  • Snap-together installation

Hardware

  • Detection width 3.6 m at 3 m
  • Install height 2 m to 3 m
  • Battery or Type-C versions
  • Adjustable angle 0° to 90°
  • IP30, ceiling or lintel mount
  • LoRaWAN connectivity

Applications

Smart buildings, retail stores, offices, restrooms, entrances and passages.

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    Description

    VS351 Description

    Overview

    The VS351 is a mini AI thermopile people counter for entrances and passages. It blends cost-effectiveness, high accuracy, and low power use in a compact body that counts people moving in and out.

    Sensor Fusion

    The battery version pairs a thermopile with radar, where radar activates the device and the thermopile counts. A built-in temperature sensor keeps performance stable across changing conditions.

    AI Counting

    An AI algorithm delivers bi-directional counts with up to 90% accuracy. It filters out side-by-side walkers and U-turns, so the data stays reliable in busy doorways.

    Versions

    A battery version gives a fully wireless install with thermopile and radar. A Type-C version runs on continuous power using thermopile only, ideal for permanent deployments.

    Power

    Synchronised radar and thermopile operation keeps power use low, and a sleep schedule pauses detection on quiet nights. This ESG-friendly design suits long-term monitoring.

    Integration

    The Milesight D2D protocol lets the counter control devices such as lights without a gateway. Local storage holds 1,000 records with retransmission to avoid data loss.

    Industry Applications

    VS351 Industrial Applications

    Retail

    Stores count footfall at entrances to measure traffic and conversion. The compact counter fits doorways without visible cabling.

    Workplace

    Offices track movement through corridors and shared areas. Occupancy trends inform space and energy planning.

    Smart Buildings

    Buildings monitor people flow at passages to manage facilities. D2D links let counts trigger lighting automatically.

    Restrooms

    Restrooms count entries to schedule cleaning by real demand. Anonymous thermopile detection protects privacy.

    Specifications

    People Counting

    Technology Radar (battery version only) & thermopile
    Installation Height 2 m ~ 3 m
    Detection Width 3.6 m @ 3 m installation height
    Sensor Adjustable Angle 0° ~ 90°
    Best Operating Temperature 15 °C ~ 30 °C
    Bi-Directional Counting Supported, up to 90% accuracy

    Temperature

    Measuring Range −30 °C ~ +70 °C
    Accuracy ± 2 °C

    Wireless Transmission

    Protocol LoRaWAN®, Milesight D2D
    Antenna Internal antenna
    Frequency CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4
    Tx Power 16 dBm (868 MHz) / 19 dBm (470 MHz) / 22 dBm (915 MHz)
    Sensitivity −137 dBm
    Mode OTAA/ABP Class A

    Interface & Software

    Button 1 × reset button (internal)
    Configuration NFC via mobile app, downlink
    Advanced Feature Data storage (1,000 entries), data retransmission, data retrievability, Milesight D2D controller

    Physical Characteristics

    Power Supply 5V/1A via Type-C port (both versions); 4 × 9000 mAh ER26500 Li-SOCl2 replaceable batteries (battery version only)
    Battery Life ~1.7 years (SF7, EU868 & US915); ~1.6 years (SF10, EU868 & US915)
    Operating Temperature −20 °C ~ +60 °C
    Relative Humidity 0 ~ 95% (non-condensing)
    Ingress Protection IP30
    Dimensions Type-C version: 70 × 68 × 32 mm; battery version: 188 × 68 × 32 mm
    Material & Color PC (flame retardant), white
    Weight Type-C version: 72.3 g; battery version: 383 g
    Installation Ceiling or lintel mounting (snap-together, 1/4 inch screw hole)

    Approvals

    Regulatory CE, FCC
    Privacy GDPR compliant, anonymous detection
    Order Codes

    Order Codes

    SKU: VS351

    VS351 (Battery Version) – thermopile + radar, fully wireless (4 × ER26500 batteries)
    VS351 (Type-C Version) – thermopile, continuous Type-C power

    Specify frequency band (EU868, US915, AS923, etc.). Order by referencing the SKU – contact info@easynt.com

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