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120GHz Millimeter Wave Sensor Level Radar Module 0.01–20m

The LDRR03M 120GHz ranging radar module adopts FMCW frequency modulated continuous wave mode and microstrip array antenna, which can replace laser, industrial ultrasonic ranging radar and other products. The product is small in size and compact in structure, making it suitable for various ranging application scenarios.

1. Ultra-High Precision

  • Accuracy: ±1mm (with external lens antenna)

  • Resolution: 1mm

  • Ideal for fine distance measurement applications

2. Extremely Compact & Lightweight

  • Dimensions: 45.15mm × 45.15mm

  • Weight: 7g – easy to integrate into space-constrained systems

3. Extremely Narrow Beam

  • Beam width: ±3° (both horizontal & vertical)

  • Minimizes interference from surrounding objects

4. Wide Operating Range & Low Power

  • Measurement range: 0.01 ~ 20m

  • Power consumption: 25mA @ 12V (typical)

  • Operating voltage: 9–24V DC

5. Flexible Communication & High Reliability

  • Interface: RS485 (115200 baud rate)

  • Protocols: ASCII / MODBUS (freely switchable)

  • Operating temperature: -45°C to +85°C

Main Parameters

Transmission frequency 120-123.5GHz
Output power 13-20dBm
Beam width (-3dB) Level±3°, Vertical±3°
Working voltage 9-24V, typical 12V
Working current 25 mA
Communication RS485
Baud rate 115200
Protocol ASCII/Modbus
Working temperature -45~+85
Refresh rate 0.1-2Fps
Overall dimensions (diameter x height) 45.15x 45.15mm
Weight 7g
Ranging range 0.01-20m
Measurement accuracy ±1mm (external lens antenna)
Resolution 1mm
Start-up time 1s

Get Free Quote of 120GHz Millimeter Wave Sensor Level Radar Module 0.01–20m

Application

The 120GHz radar system can precisely measure the distance of stationary or moving targets. The output of the sensor can be configured based on the filtering results of the range or signal strength.

What is the measurement range and accuracy?
Range: 0.01 to 20 meters. Accuracy: ±1mm (with external lens antenna). Resolution: 1mm.
What technology does it use?
FMCW (Frequency Modulated Continuous Wave) with microstrip array antenna.
What is the beam angle?
±3° in both horizontal and vertical directions (-3dB beamwidth).
What communication interface and protocols does it support?
RS485 with default baud rate 115200. Supports both ASCII and MODBUS protocols – freely switchable.
What are the power requirements?
9–24V DC, typical current 25mA (very low power consumption).
What is the refresh rate?
Configurable from 0.1 to 25 Fps.
What are the dimensions and weight?
45.15mm × 45.15mm (square), weight: only 7g – extremely compact and lightweight.
Can it replace laser or ultrasonic sensors?
Yes. Designed as a direct replacement for laser and industrial ultrasonic ranging sensors.
What are the typical applications?
Liquid level measurement, solid material level monitoring, industrial automation distance measurement, robotics, and drone altimetry.

Technical Support & Custom Solution

We provide datasheet, dimension drawing, interface protocol, demo code and technical support.

Support sample test, ODM/OEM customized service, welcome global customers to inquire and cooperate.

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