Milesight VS321 Milesight LoRaWAN AS923 Wireless battery-powered AI Occupancy Sensor enabling real-time monitoring ofoccupancy detection, ambient light sensing, andenvironmental monitoring
Milesight VS321 Milesight LoRaWAN AS923 Wireless battery-powered AI Occupancy Sensor enabling real-time monitoring ofoccupancy detection, ambient light sensing, andenvironmental monitoring
- Brand: Milesight
- MPN: VS321-915M-B
- Part #: CCTMLS1303
- UPC:
- Brand: Milesight
- MPN: VS321-915M-B
- Part #: CCTMLS1303
- UPC:
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Milesight VS321 Milesight LoRaWAN AS923 Wireless battery-powered AI Occupancy Sensor enabling real-time monitoring ofoccupancy detection, ambient light sensing, andenvironmental monitoring
- Brand: Milesight
- MPN: VS321-915M-B
- Part #: CCTMLS1303
Product URL: https://www.pbtech.com/product/CCTMLS1303/Milesight-VS321-Milesight-LoRaWAN-AS923-Wireless-b
Features
Wireless AI Occupancy Sensor
- Wireless Battery Version (10+ Years of Life)
- Multi Sensors Built-in(T&H, Light)
- Up to 95% Occupancy Accuracy
- Accurate People Counting & Desk Occupancy
- 100% Anonymous Detection
- Unique Milesight D2D Controller
Optimize Workspace with Wireless Occupancy Sensor
VS321 is a battery-powered AI wireless occupancy sensor for occupancy detection, ambient light sensing, and environmental monitoring. With D2D and LoRaWAN® support, it enables smart automation such as lighting controls and remote management. Ideal for offices, meeting rooms, and campuses to enhance comfort, efficiency, and space utilization.
Wireless Occupancy Sensing for Office Space Optimization
Unlock Space Value with Regional People Counting
VS321 detects occupancy at configurable intervals through regional people counting and workstation-level detection, helping optimize layouts, improve space usage, and reduce energy consumption without invasive monitoring. Perfect for organizations seeking wireless occupancy sensors for lighting control, VS321 can automatically adjust lighting based on room occupancy, ensuring energy savings and a smarter workplace.

Smarter Desk Use with Workstation Occupancy Detection
With desk-level occupancy detection, VS321 supports flexible seating and data-driven space planning. As a wireless occupancy sensor for lights, it can trigger workstation lighting only when occupied, keeping unused areas off for maximum efficiency. Battery-powered and easy to install, the sensor delivers interval-based updates and supports 4-8 desk detection zones for effortless office management.
Cutting-Edge Sensing with Less Power
VS321 combines PIR motion sensing with an RGB camera and embedded AI algorithms to achieve up to 95% occupancy detection accuracy.
Reporting Mode
VS321 performs occupancy detection at configurable intervals to deliver stable monitoring, making it perfect for daily workstation management.
Detection Mode
VS321 leverages PIR to trigger the camera only upon motion detection, with AI analyzing images to determine occupancy. This dual-tech approach ensures accurate detection, enables efficient workstation management, and reduces power consumption for longer battery life.

Battery-powered Occupancy Sensor for Easy Installation
Eliminate wiring constraints and adapts easily to complex environments such as old buildings and open office layouts. Require no construction-installs instantly, reducing deployment time and cost while supporting ESG initiatives and low-carbon workspace goals.

Built-in Multiple Sensors for Optimal Comfort
VS321 smart wireless occupancy sensor continuously monitors temperature, humidity, and ambient light to provide actionable insights for a healthier, more comfortable, and energy-efficient environment-supporting your ESG and sustainability goals.

Smart Wireless Occupancy Sensors for Your Spaces
Adaptable to various office environments, VS321 help reduce costs and boost efficiency. Empower your workspace with smart, sustainable, and easy-to-deploy technology.

Specifications
People Counting & Occupancy Detection
Field of View
129 ° Horizontal, 93 ° Vertical
Installation Height
2.4m ~ 4m
Required illumination
50 Lux
PIR Measuring Angle
115°
PIR Detection Area
Radius: 4 m (15°C, 3m Installation Height)
Temperature
Operating Principle
Digital CMOSens® technology (MEMS)
Measuring Range
-40 °C~125 °C
Accuracy
±1 °C
Resolution
0.1 °C
Humidity
Operating Principle
Digital CMOSens® technology (MEMS)
Measuring Range
0~100 %RH
Accuracy
± 2.5 %RH
Resolution
0.5 %RH
Light
Operating Principle
Photodiode
Status
Bright/Dim
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)/20 dBm (915 MHz)/19 dBm (470 MHz)
Sensitivity
-137 dBm @ 300bps
Work Mode
OTAA/ABP Class A
Others
USB
1 × Type-C Port for Temporary Power Supply
LED Indicator
1 × Status Indicator
Button
1 × Multi-function Button
Software
Configuration
Bluetooth
Advanced Feature
Milesight D2D Controller, Data Storage (2045 entries), Data Retransmission, Data Retrievability, Threshold Alarm, Hibernate Mode
Physical Characteristics
Power Supply
4 × 2700 mAh ER14505 Li-SOCl2 Replaceable Batteries
Battery Life2 (Working 8h per day, 5-min Detection Interval and Report Interval, 25 °C)
Around 11.3 Years (SF7, EU868)
Around 10.8 Years (SF7, US915)
Around 7.5 Years (SF10, EU868 & US915)
Operating Temperature
0°C ~ +30°C
Relative Humidity
0 ~ 95% (Non-condensing)
Ingress Protection
IP30
Housing&Color
Plastic (UL94, V2) & White/Black (Optional)
Weight
145g (Batteries excluded)
Dimension
100 × 100 × 26 mm (3.94 × 3.94 × 1.02 in)
Installation
Ceiling Mounting (Screws or Adhesive Backed Fixed)
Approvals
Regulatory
CE, FCC
Environmental
RoHS(Planned)
Note
Disclaimer
Prolonged operation may lead to overheating and reduced detection performance.
Tested under laboratory conditions and for guideline purposes only.

