MILESIGHT - LoRaWan office/seat occupancy PIR & therm sensor

VS341 technical overview

The Milesight VS341 is an intelligent occupancy detection sensor designed to precisely identify human presence in professional and tertiary environments. It is based on dual-sensor technology combining a PIR (passive infrared) for motion detection and a thermopile for short-range body heat detection. This combination ensures reliable recognition, even when the person is motionless.

The device communicates via the LoRaWAN® Class A protocol, compatible with most public or private networks. It also incorporates Milesight D2D technology, enabling direct interaction with other compatible equipment, without any intermediate gateway. It is configured locally via NFC, using the Milesight Toolbox application, and can be easily integrated into a home automation or BMS network.

VS341 applications

• Occupancy monitoring of individual offices or workstations
• Management of open-plan meeting rooms or shared spaces
• Energy optimization through automatic deactivation of unoccupied equipment
• Automation of presence-related scenarios (lighting, ventilation, heating)
• Occupancy metering and analysis for tertiary space management

VS341 functions

• Motion detection by PIR sensor (wide angle)
• Thermal analysis by thermopile (passive detection of body heating)
• Silent presence recognition (no movement) up to 1 meter
• Low-power LoRaWAN® communication
• Milesight D2D support :
• local transmission between sensors or actuators
• Pairing and parameterization via NFC (mobile application)
• Configurable LED indication
• Can be wall-mounted or mounted on office furniture
• Discreet format and professional aesthetics

VS341 technical specifications

• Model: VS341
• Detection technology: PIR + thermopile
• PIR detection angle: 107° horizontal / 107° vertical
• Thermopile field of action: 50°
• Maximum detection distance (thermopile): 1 m
• Recognition rate: up to 98% in mixed detection
• Communication: LoRaWAN® Class A (rates adapted to message typology)
• Compatible frequencies:
• CN470 / IN865 / EU868 / RU864 / US915 / AU915 / KR920 / AS923
• D2D (Device to Device) function: yes, Milesight proprietary protocol
• Local configuration: via NFC with Milesight ToolBox mobile app
• Power supply:
• 1 × ER18505 lithium battery (4000 mAh)
• Estimated battery life: up to 5 years in normal use
• Protection rating: IP30 (indoor use only)
• Dimensions: 73 × 73 × 26 mm
• Weight: 90 g
• Operating temperature:
• -20°C to +60°C
• Permissible humidity: 0% to 95% (non-condensing)
• Materials: ABS + fire-retardant PC
• Installation: double-sided adhesive or screw mounting