Milesight VS351

This innovative people counter combines cost-effectiveness, high accuracy, and low power consumption. Utilizing thermopile and radar technologies, it precisely counts people passing through designated areas in and out.

VS351 is a compact AI thermopile people counter designed for indoor entrances and exits applications, it offers high accuracy in bi-directional people counting, enabling effective analysis of foot traffic and efficient space management. Combined with a radar sensor for presence detection, it intelligently schedules the activation time of the thermopile to optimize power consumption. As a Milesight D2D controller, the VS351 seamlessly communicates with other Milesight D2D devices, establishing more possible connections and paving the way for smoother operations.
With easy configuration and wireless detection, the VS351 facilitates simple deployment and connectivity. Compliant with the Milesight LoRaWAN® gateway and Milesight IoT Cloud solution, users can know the number of people in any indoor space and trigger other sensors or appliances easily via a webpage or mobile App remotely.

• Retail: Optimize store layouts, staffing, and marketing strategies based on accurate foot traffic data.
• Public Transportation: Monitor passenger flows to improve service efficiency and safety.
• Event Management: Track attendance and manage crowd control at large events and venues.
• Smart Cities: Integrate with other IoT devices to enhance urban planning and public safety initiatives.

• Provide up to 95% detection accuracy (99% accuracy for single person passing) for bi-directional people counting with radar (battery version only) and the thermopile technology
• A Built-in temperature sensor that can not only support environmental temperature detection but also monitor whether the operating temperature of the device is within a reasonable range
• 100% anonymity and GDPR-compliant without image capturing, free from privacy concerns
• Type-C version (wired) and battery version (wireless) available for different installation environments
• Ultra-low power consumption with up to 1.6-year battery life, complies with ESG standard
• Wireless connectivity and convenient size improve the accessibility and simplicity of deployment
• Store locally 1,000 historical records and support retransmission to prevent data loss
• Support Milesight D2D protocol to enable ultra-low latency and direct control without gateways
• Equipped with NFC for one touch configuration
• Function well with standard LoRaWAN® gateways and network servers
• Compatible with Milesight IoT Cloud

Measurement


People Counting


Technology
Radar (Battery Version Only) & Thermopile

Installation Height
2.3 m ~ 3.0 m

Detection Range
5.55 m x 2.30 m @ 3 m Installation Height

Sensor Adjustable Angle
0°~90°

Detection Rate1
Up to 95% (Single Person2: Up to 99%)

Best Operating Temperature
15 °C ~ 30 °C

Advanced Features
U-Turn Filtering, Bi-directional People Counting, Side by Side Differentiation



Temperature


Range
-30°C ~ 70°C

Accuracy
± 2°C



Wireless Transmission


Protocol
LoRaWAN®, Milesight D2D

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
-137dBm

Mode
OTAA/ABP Class A



Others


Button
1 x Reset Button (Internal)

Configuration
NFC Configuration via Mobile App

Advanced Feature
Data Storage, Data Retransmission, Data Retrievability, Milesight D2D Controller



Physical Characteristics


Power Supply
1. 5V/1A by Type-C Port (Both Versions)
2. 4 x 9000 mAh ER26500 Li-SOCl2 Replaceable Batteries (Battery Version Only)

Battery Life3
Around 1.6 Years (30-min Interval, 25°C, 1000 People per Day )

Operating Temperature
-20°C ~ 60°C

Relative Humidity
0% ~ 95% (Non-condensing)

Ingress Protection
IP30

Dimension
Type-C Version: 70 x 68 x 32 mm ( 2.76 x 2.68 x 1.26 in)
Battery Version: 188 x 68 x 32 mm ( 7.40 x 2.68 x 1.26 in)

Material & Color
PC (Flame Retardant), White

Installation
Ceiling Mounting, Lintel Mounting



1 Tested under installation height is 2.7m and temperature is 25°C.
2 30 ~ 40 cm should be kept between two people while passing the detection area.
3 Tested under laboratory conditions and for guideline purposes only.

Ordering Information

• Milesight VS351 Datasheet (180.4 kB)