Hi-Link HLK-LD021 5.8GHz Radar Sensor Module, Human Presence & Motion Detection, Detection Range: 10-12m Radial - TTL Output
The Hi-Link HLK-LD021 is a compact 5.8GHz Doppler radar motion sensor module providing reliable human presence detection for smart lighting, IoT automation, and security systems. It features a TTL-level output compatible with microcontrollers like Arduino, ESP32, and Raspberry Pi, operating from a 5-12V DC supply.
Features
- 5.8GHz Doppler Radar Technology for stable, interference-resistant motion sensing.
- Adjustable sensing range up to 10-12m radial coverage with a 110° beam width.
- Ultra-low power consumption of 70–80µA for battery-powered IoT applications.
- TTL-level digital output (3.3V typical) for direct microcontroller interfacing.
- Compact 18x18x3mm form factor designed for concealed, embedded installations.
Out of stock
The HLK-LD021 utilizes 5.8GHz Doppler radar technology to detect human motion and presence by sensing micro-movements and speed changes. This principle ensures high consistency and strong immunity to environmental interference from temperature, humidity, or non-metallic obstructions, making it suitable for harsh conditions.
The module outputs a TTL-compatible high/low signal upon detection, with configurable delay and lockdown times for tailored automation responses. Its fast initialization and inspection mode facilitate rapid deployment and system testing in smart home, commercial lighting, and industrial monitoring applications.
Additional Information
| Weight | 0.003 kg |
|---|---|
| Dimensions | 1.8 × 1.8 × 0.3 cm |
