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Hi-Link HLK-LD021 5.8GHz Doppler Radar Motion Sensor Module | Low Power Human Motion Detection Sensor
The Hi-Link HLK-LD021 is a compact 5.8GHz Doppler radar motion sensor module designed for reliable human motion detection in low-power embedded applications. Unlike PIR sensors, it uses microwave Doppler sensing technology to detect movement based on reflected signal changes, providing stable performance across varying environmental conditions. It is ideal for smart lighting, occupancy sensing, energy-saving automation, and concealed installations where traditional motion sensing may be less effective.
Built with integrated signal processing and directional transmit/receive antennas (1T1R), the HLK-LD021 offers accurate motion perception with low power consumption and fast initialization. The module supports adjustable sensing range, delay configuration, and optional ambient light detection to enable intelligent control scenarios. Its compact size and resistance to temperature, humidity, smoke, and water mist make it suitable for indoor automation products and smart IoT systems.
Features
- 5.8GHz microwave Doppler radar motion detection
- Low power operation for embedded applications
- Human motion sensing with stable performance
- Directional 1T1R antenna architecture
- Adjustable sensing range and delay timing
- Optional ambient light detection capability
- Fast startup and inspection mode support
- Compact design for concealed installation
- Resistant to environmental factors like humidity and smoke
- Suitable for smart lighting and automation systems
Specifications
- Model: HLK-LD021
- Detection Technology: Doppler Microwave Radar
- Operating Frequency: 5.8GHz (Typical)
- Frequency Band: 5.725 – 5.875GHz
- Operating Voltage: 5V DC (supports approx. 5–12V input)
- Operating Current: ~1.8mA
- Output Voltage (Vout): 3.3V (Typical 3.2–3.4V)
- Output Current: <10mA
- Detection Type: Human Motion / Motion Presence Detection
- Detection Distance: Radius 3–5m (ceiling mount at 3m height)
- Wall Mount Detection: Up to 10–12m (radial)
- Detection Angle: 110° ±10°
- Beam Pattern: Directional 1T1R Antenna
- Delay Time: 5s (Typical)
- Blocking Time: 2s (Typical)
- Initialization Time: ~5–7 seconds
- Operating Temperature: -20°C to +70°C
- Additional Features: Adjustable sensing range, delay setting, optional light sensing, fast inspection mode
- Installation Type: Ceiling / Wall / Concealed Embedded Installation
Applications
- Smart lighting systems
- Motion-activated switches
- Occupancy and presence detection
- Smart home automation
- Office and hotel lighting control
- Energy-saving IoT solutions
- Embedded motion sensing devices
Package Includes
- 1x Hi-Link HLK-LD021 5.8GHz Doppler Radar Motion Sensor Module | Low Power Human Motion Detection Sensor
