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120GHz Radar Liquid Level Sensor Mmwave Radar Sensors

LDRR15 terahertz radar is suitable for various ranging application scenarios such as storage tanks, pumping stations, manholes, and underground pipe networks. The radar integrates a microstrip antenna, RF circuit and signal processing circuit, adopts FMCW mode, and features a non-contact installation design with a small blind zone, high precision and strong anti-interference ability.

Main parameters

Part number LDRR15
Transmission frequency 120-125GHz
Output Power (EIRP) 13-20dBm
Beam width (-3dB) Horizontal : 25°,Vertical : 25°
External lens antenna with beam width (-3dB) Horizontal : 3°,Vertical : 3°
Working voltage 9-24V
Working current 1.6-9mA
Working temperature -45℃~+85℃
Weight 130g
Shell material ASA
Protection grade IP68
Ranging range 0.02-10m
Measurement accuracy ±1mm
Resolution 1mm
Refresh rate 0.1-10Fps
Digital interface RS485/TTL
Strat-up time 1s

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Application

The LDRR15 terahertz radar is suitable for various ranging application scenarios such as storage tanks, pumping stations, manholes, and underground pipe networks.

What is the measurement range and accuracy?
Range: 0.03 to 10 meters. Accuracy: ±1 mm. Resolution: 1 mm.
What is the beam angle?
±25° in both horizontal and vertical directions. With external lens antenna, beam width narrows to ±3°.
What is the power consumption?
Ultra-low power: only 1.6–9mA at 12V (typical 9mA).
What communication interface does it support?
RS485 (default) or TTL (optional). Protocols: ASCII / MODBUS – freely switchable.
What is the protection rating?
IP68 – fully waterproof for harsh environments.
What mediums can it measure?
Preferred: water, metal, concrete. Avoid: plastic, glass, paper, ceramics, hollow walls (low dielectric constant materials).
What are the typical applications?
Storage tanks, pumping stations, manholes, underground pipe networks, and industrial liquid level measurement.

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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