80GHz Radar Doppler Sensor 0.1–40m Radar Distance Sensor
LDRR04R radar sensor is specifically designed for hydrological detection. This module adopts the FMCW mode, features a non-contact installation design, and is compact in size and structure.
1. High Precision Measurement
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Accuracy: ±3mm (with external lens antenna)
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Resolution: 1mm
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Range: 0.1 ~ 40m
2. Flexible Beam Options
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Without lens: ±25° (wide beam)
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With external lens: ±3° (narrow beam for precise targeting)
3. Ultra-Compact & Lightweight
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Dimensions: 36.6mm × 47mm
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Weight: 10g – easy to integrate
4. Low Power Consumption
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Operating current: 25mA @ 12V
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Wide voltage range: 7–24V DC
5. Fast Startup & Flexible Output
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Startup time: 100ms (fastest)
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Refresh rate: 0.1 ~ 25 Fps (adjustable)
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Protocols: ASCII / MODBUS (switchable)
Main Parameters
| Part number | LDRR04R |
| Transmission frequency | 77-81GHz |
| Output Power | 13-20dBm |
| Beam width | Horizontal ±25°，Vertical ±25° |
| External lens antenna with beam width (-3dB) | Horizontal ±3°，Vertical ±3° |
| Working voltage | 7-24V, typical 12V |
| Working current | 25mA |
| Communication | RS485 |
| Baud rate | 115200 |
| Protocol | ASCII/Modbus |
| Working temperature | -45℃~+85℃ |
| Refresh rate | 0.1-25Fps |
| Module size (diameter x height) | 36.6*47 mm |
| Weight | 10 g |
| Ranging range | 0.1~40m |
| Measurement accuracy | ±3mm (external lens antenna) |
| Resolution | 1mm |
| Start-up time | 100ms |
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Application
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.
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Lake & river water level monitoring
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Flash flood warning systems
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Reservoir & dam water level measurement
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Sewage network water level monitoring
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Industrial liquid level measurement (tanks, containers)
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Agricultural irrigation canal water level monitoring
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Bridge & tunnel drainage monitoring
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Underground pipe network water level detection
Custom Service & Technical Support
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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