Product Description

The HLK-LD2420 is a high-performance 24GHz millimeter-wave radar module designed for precise detection of human presence, micro-movements, and motion. Using advanced FMCW radar technology and onboard signal processing, it detects people even when they remain still — outperforming traditional PIR sensors in accuracy and reliability. Compact and easy to integrate, this sensor is ideal for smart home systems, IoT devices, automation projects, and security applications.

Key Features

• 24GHz millimeter-wave FMCW radar for highly accurate presence and movement detection.

• Detects motion and micro-motion, including standing or seated individuals.

• Up to 8m sensing range with adjustable detection distance and sensitivity.

• Wide ±60° detection angle for broad area coverage.

• Ultra-compact 20mm × 20mm size suitable for embedded designs.

• 3.3V supply voltage with low operating current (~50mA).

• GPIO and UART interfaces for simple or advanced data output.

• Configurable detection zones, sensitivity levels, and response time.

• Supports wall, ceiling, or enclosure-integrated mounting.

Specifications

• Technology: 24GHz FMCW millimeter-wave radar

• Detection Range: Up to ~8 meters

• Detection Angle: ±60°

• Supply Voltage: 3.0–3.6V (typical 3.3V)

• Operating Current: Approx. 50mA

• Interfaces: GPIO, UART

• Module Size: 20mm x 20mm

• Output: Presence detection, motion state, micro-motion sensing

Applications

• Smart home automation (lights, appliances, climate control)

• Security and alarm systems

• IoT devices and embedded projects

• Smart lighting occupancy sensing

• Commercial building automation

• Human presence detection for screens, kiosks, or devices

• Touchless activation systems