0.1-20m Radar Liquid Level Sensor 80GHz Radar Sensor
The LDRR04S radar sensor is a radar module specifically designed for hydrological detection.
This module adopts the FMCW mode, featuring a non-contact installation design.
1. High Precision
±3 mm accuracy with 1 mm resolution over a 20-meter range.
2. Ultra-Compact & Lightweight
35 × 35 × 1.2 mm, only 5g – easy to embed into existing systems.
3. Low Power
Operates on 3.3–5V with maximum 27mA current draw.
4. Flexible Beam Options
Wide ±25° beam for broad coverage, or narrow to ±3° with external lens for focused targeting.
5. Standard Communication
UART interface with switchable ASCII/MODBUS protocols for easy integration.
Main Parameters
| Part number | LDRR04S |
| Transmission frequency | 77-81GHz |
| Output Power (EIRP) | 13-20dBm |
| Beam width | Horizontal±25°, Vertical±25° |
| External lens antenna with beam width (-3dB) | Horizontal±3°, Vertical±3° |
| Working voltage | 3.3-5V |
| Working current | 27mA |
| Output | UART |
| Baud rate | 115200 |
| Protocol | ASCII/Modbus protocol |
| Temperature | -45°~+85° |
| Refresh rate | 0.1-25Fps |
| Module size | L35 W35 H1.2 mm |
| Weight | 5g |
| Measurement accuracy | ±3mm |
| Ranging range | 0.1-20m |
| Resolution | 1mm |
| Start-up time | 100ms |
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Application
It is compact in size and has a tight structure. It features high precision, low power consumption and strong anti-interference ability, and is suitable for water level monitoring in lakes, rivers, mountain floods, reservoirs, sewage networks, etc.
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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