mmWave Radar Presence Sensor for Vital Sign Detection, RS485

This mmWave radar presence sensor uses ultra-wideband millimeter-wave radar to detect human presence through breathing, heart rate, and micro-movements, sensing even stationary occupants at ranges up to 4 meters. Available from SUCH with vital sign detection and fall alert capability, the sensor outputs data via RS-485 (Modbus RTU) for straightforward integration into building automation and monitoring systems. It is well suited for bathrooms, elevators, nursing rooms, and meeting spaces where reliable occupancy and safety monitoring are required.

Feature

• Vital sign detection — Senses breathing and heart rate patterns to confirm human presence even when a person is completely still, reducing false "vacant" readings common with PIR sensors.
• Fall detection with real-time alerts — Recognizes sudden posture changes within a 2m × 2m range and triggers an alert, supporting faster response in bathrooms, nursing rooms, and elder-care settings.
• 4m detection range — Covers up to 4m × 6m for activity detection and 4m × 4.5m for static presence, suiting mid-sized rooms without additional units.
• RS-485 output with Modbus RTU — Standard serial protocol allows direct wiring into PLCs, BMS, or centralized monitoring platforms without extra gateways.
• Non-contact, through-obstacle sensing — Millimeter-wave radar penetrates non-metallic materials such as glass and plastic, allowing flexible mounting behind panels or enclosures.
• Stable operation across environments — Rated for -10°C to 55°C and 0-95% RH (non-condensing), with a 1-minute warm-up, for consistent performance in washrooms and unconditioned spaces.
• Ceiling-mount design — ABS housing with optimized beam coverage simplifies installation in bathrooms, elevators, and meeting rooms.
• Privacy-friendly monitoring — Radar-based sensing detects occupancy and motion without capturing images, an alternative to camera-based systems in privacy-sensitive areas.

Dimension (Unit:mm)

Detection Range

The sensor provides different detection areas for various monitoring functions:

Activity Detection: Up to 4 m × 6 m
Static Presence Detection: Up to 4 m × 4.5 m
Fall Detection: Up to 2 m × 2 m