Hi-link HLK-LD2420 24Ghz Human Distance Detection Radar Sensor Module
The Hi-Link HLK-LD2420 24GHz Human Distance Detection Radar Sensor Module is a compact microwave Doppler radar sensor designed for reliable motion and occupancy detection. With a sensing range of up to 6 meters, low power consumption, and digital output, it is ideal for smart home automation, security systems, and IoT applications.
The Hi-Link HLK-LD2420 Radar Sensor Module is another radar sensor from Hi-Link that uses microwave radar technology for motion detection and proximity sensing. This sensor is designed for a variety of applications where reliable and non-contact motion detection is required. It works by using Doppler radar technology, allowing it to detect the movement of objects without the need for line-of-sight, which can be a limitation for traditional PIR (Passive Infrared) sensors.
Applications of the HLK-LD2420 Radar Sensor Module:-
- Motion Detection: Detect movement in environments such as homes, offices, or industrial spaces for automation or security purposes.
- Occupancy Sensing: Used in smart buildings to detect occupancy in rooms for automatic lighting and HVAC control.
- Security Systems: Integrated into alarm systems to detect intruders or unauthorized movement in sensitive areas.
- Automatic Doors and Gates: Trigger doors or gates to open when motion is detected, commonly used in automated doors for buildings, elevators, or parking gates.
- Healthcare Applications: Used for monitoring patient movement in healthcare facilities or assisting elderly people by detecting falls or unusual movement.
- Robotics: Applied in autonomous systems for obstacle avoidance and human detection.
- Smart Home Systems: Used in smart home devices to automate the operation of lights, fans, or other appliances based on human presence.
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Description
The Hi-Link HLK-LD2420 24GHz Human Distance Detection Radar Sensor Module is an advanced motion sensing solution that utilizes 24GHz microwave Doppler radar technology for accurate and reliable human movement detection. Unlike traditional PIR sensors, the HLK-LD2420 can detect motion through non-metallic materials such as glass, plastic, and thin walls, making it highly versatile for modern automation and security applications.
The sensor continuously transmits microwave signals and analyzes frequency shifts caused by moving objects. This enables precise motion detection without requiring direct line-of-sight, making it suitable for concealed installations and environments where conventional motion sensors may struggle.
With a detection range of up to 5–6 meters, low power requirements, and simple digital output, the HLK-LD2420 is easy to integrate into Arduino, ESP32, Raspberry Pi, STM32, and other embedded platforms. Its compact design and stable performance make it an excellent choice for smart homes, industrial automation, occupancy monitoring, and security systems.
Key Features
Advanced 24GHz Doppler microwave radar technology
Accurate human motion and distance detection
Detection range up to 5–6 meters
Digital HIGH/LOW output for easy integration
Operates on 5V DC power supply
Low power consumption suitable for battery-powered devices
Detects movement through glass, plastic, and non-metallic materials
Compact and lightweight design
Not affected by ambient light conditions
Stable performance in indoor and outdoor environments
Easy interface with Arduino, Raspberry Pi, ESP32, and other controllers
Advantages Over PIR Sensors
Detects movement through non-metallic barriers
Works in complete darkness and bright environments
Higher sensitivity and reliability
Better performance in varying environmental conditions
Suitable for hidden installations inside enclosures
Applications
Smart Home Automation
- Automatic lighting control
- Smart switches and appliance automation
- HVAC occupancy sensing
Security Systems
- Intruder detection
- Motion-triggered alarms
- Perimeter monitoring
Occupancy Detection
- Meeting rooms and office spaces
- Building energy management systems
- Smart occupancy monitoring
Automatic Doors & Gates
- Motion-triggered entry systems
- Elevator and parking gate automation
- Touchless access control
Healthcare Applications
- Patient movement monitoring
- Elderly care systems
- Fall detection support solutions
Robotics & IoT
- Human detection
- Obstacle sensing
- Autonomous navigation systems
Technical Specifications
| Parameter | Value |
|---|---|
| Operating Frequency | 24GHz |
| Technology | Doppler Microwave Radar |
| Detection Range | Up to 5–6m |
| Operating Voltage | 5V DC |
| Output Type | Digital HIGH / LOW |
| Detection Type | Motion & Distance Detection |
| Interface | Digital Output |
| Installation | Embedded / Surface Mount |
| Barrier Penetration | Glass, Plastic, Non-Metallic Materials |
Package Includes
1 × Hi-Link HLK-LD2420 24GHz Human Distance Detection Radar Sensor Module
Why Choose HLK-LD2420?
The HLK-LD2420 offers a powerful combination of 24GHz microwave radar sensing, non-contact motion detection, and easy integration. Its ability to detect movement through non-metallic materials and operate independently of lighting conditions makes it an excellent alternative to traditional PIR sensors for smart homes, automation systems, security installations, and industrial IoT applications.
Features of the Hi-Link HLK-LD2420 Radar Sensor Module:-
Microwave Radar Technology:
The HLK-LD2420 uses microwave Doppler radar technology to detect motion. It sends out a microwave signal, and when an object moves, the frequency of the returned signal changes. This change in frequency (Doppler shift) is used to detect motion.
Operating Frequency:
The sensor operates at a frequency of 24 GHz, which is commonly used in radar sensors. This higher frequency allows for greater accuracy in detecting movement at a relatively higher range.
Detection Range:
The HLK-LD2420 offers a detection range of up to 5-6 meters (approximately 16-20 feet), depending on environmental factors like the surface of the object and the surrounding conditions.
Low Power Consumption:
It operates on a 5V DC power supply, making it a low-power solution for battery-operated systems or energy-efficient designs. This is an ideal feature for IoT applications and other battery-powered devices.
Digital Output:
The module provides a digital output signal (HIGH when motion is detected, LOW when no motion is detected), making it easy to interface with microcontrollers like Arduino, Raspberry Pi, or other devices that accept digital inputs.
Non-Contact Detection:
Unlike PIR sensors, which require line-of-sight and detect infrared radiation, the HLK-LD2420 radar sensor can detect motion through walls, glass, and other non-metallic barriers. This is particularly useful in applications where traditional sensors would be ineffective.
Compact Size:
The HLK-LD2420 is small and compact, making it easy to integrate into your designs, whether it’s for a security system, an automation project, or any other type of system where space is a concern.
Stable Performance:
Since radar technology isn’t influenced by ambient lighting conditions, the HLK-LD2420 can detect motion reliably in both bright light and dark environments, making it suitable for a wide range of applications.
