120GHz Liquid Level Sensor Doppler Radar Sensor Module
LDRR03B 120GHz ranging radar adopts the FMCW frequency-modulated continuous wave mode. With a microstrip array antenna and an independent replaceable lens antenna for focusing, it can replace products such as laser and industrial ultrasonic ranging radars. The product is compact in size and structure, and is suitable for various ranging application scenarios.
1. Ultra-High Precision
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Accuracy: ±2mm
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Resolution: 1mm
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Ideal for applications requiring fine distance measurement
2. Extremely Narrow Beam for Precise Targeting
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Beam width: ±3° (both horizontal & vertical)
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Microstrip array antenna + replaceable lens antenna for focused detection
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Minimizes interference from surrounding objects
3. Wide Operating Range & Low Power
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Measurement range: 0.01 ~ 20m
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Power consumption: 20mA @ 12V (typical)
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Operating voltage: 9–24V DC
4. Flexible Communication & High Reliability
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Interface: RS485 (115200 baud rate default)
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Protocols: ASCII / MODBUS (freely switchable)
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Operating temperature: -45°C to +85°C
5. Robust Environmental Protection
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Protection rating: IP67 (default), IP68 (upgradeable with full potting)
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Suitable for harsh environments including underground pipe networks and long-term submersion
Main Parameters
| Measuring performance | |
| Minimum Range | 0.1 m |
| Maximum Range | 20m |
| Resolution | 1mm |
| Beam width (-3dB) | Horizontal ±3°， Vrtical ±3° |
| Measurement Accuracy | ±2mm |
| Set-up time | 1s |
| External dimensions (diameter x height) | 66mm x 93mm |
| Operating conditions | |
| Operating frequency band | 120-123.5 GHz |
| Mains power supply | 9 V-24 V DC, typically 12V |
| Operating current | 20 mA |
| Output Power (EIRP) | 13-20 dBm |
| Data interface | RS485, default baud rate 115200, ASCII/Modbus protocol can be freely switched |
| Operating temperature range | ﹣45°C~+85°C |
| Refresh rate | 0.1-25Fps |
| Protection grade | IP67, and it can be upgraded to IP68 |
| Housing & Mounting | |
| Weight | 280 g |
| Housing material | ABS+PC(black)/ PTFE(white) |
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Application
The 120GHz radar system can precisely measure the distance of stationary or moving targets, and the output of the sensor can be configured based on the filtering results of the range or signal strength.
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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