Hi-Link LD2420 24GHz Radar Sensor


Package Includes

  • 1x Hi-Link LD2420 24GHz Radar Sensor Module

Availability: 28 in stock

The LD2420 from Hi-Link is a high sensitivity 24GHz human presence sensing module. It operates primarily based upon the principle of FMCW (Frequency Modulated Continuous Wave) to detect human targets in a set space. Radar signal processing and accurate human body sensing algorithms allow a high level of sensitivity when detecting bodies that are either in motion or stationary – a big step up from your standard PIR sensors. Approximate distance to the target can also be calculated using the data received from the radar sensor. Reaching up to a maximum sensing distance of 8 meters (With a resolution of 0.75m), this sensor is primarily used indoors to output results in real-time.

Features / Specs

  • Manufacturer: Hi-Link
  • Model: LD2420
  • mmWave Sensor Chip: Iclegend S3KM1110
  • Frequency Band: 24 – 24.25GHz (Complies with FCC and CE Certification Standards)
  • Modulation: FMCW (Frequency Modulated Continuous Wave)
  • Max Sensing Distance (Wall Mounted): 8 Meters (6 Meters for micro-motion)
  • Max Sensing Distance (Ceiling Mounted): 5 Meters (4 Meters for micro-motion)
  • Distance Detection Accuracy: ±0.35 Meters
  • Resolution: 0.7 Meters
  • Sensing Angle: ± 60 Degrees
  • Operating Voltage Range: 3.0 – 3.6VDC
  • Output and Logic Level Voltage: 3.3VDC
  • Operating Current: ~50mA
  • Operating Temperature Range: -40°C to +85°C
  • Data Refresh Rate: 10Hz
  • Communication Protocol: UART (Default Baud Rate = 256000)
  • Header Pin Pitch: 2.54mm
  • Dimensions: ~(20mm x 20mm)

Pin Description

  • 5. 3V3-> Supply Voltage (3.0 – 3.6VDC)
  • 4. GND-> Ground
  • 1. OT1-> UART TX Pin
  • 2. RX-> UART RX Pin
  • 3. OT2-> Digital Output (HIGH if human body is detected, otherwise LOW)


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