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24GHz Radar Flowmeter Velocity Sensor Water Level Sensor

LDSR08 is a radar flowmeter integrating a microstrip antenna, RF circuit and signal processing circuit, which directly outputs the velocity information of the target and is used for flow velocity measurement in rivers and underground pipe networks. The radar adopts German imported integrated chips, a pre-low-noise amplifier and ultra-high sensitivity.

Main Parameters

Transmission frequency 24GHz
Output Power (EIRP) 20dBm
Transmitting antenna gain 18.5dBi
Receiving antenna gain 18.5dBi
Working voltage 9-24V
Working current 88mA
Measurement range 0.05-20m/s
Measurement accuracy ±0.01m/s
Resolution 0.01m/s
Measurement time 1 Times /s
Digital interface RS485
Baud rate 9600bps
Protocol ASCII\MODBUS

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Application

The SR08S sensor can be used for measuring the flow rate of rivers and underground pipelines, among other applications.

What is the measurement range and accuracy of flow velocity?
Measurement range: 0.05 to 20 m/s. Accuracy: ±0.01 m/s. Resolution: 0.01 m/s.
Can it detect flow direction?
Yes. The module supports bidirectional automatic identification (approaching / moving away). Directional filtering can be configured as needed.
What communication interface and protocols does it support?
RS485 interface with default baud rate 9600bps. Compatible with both ASCII and MODBUS protocols – switchable via commands.
What are the power requirements?
Operating voltage: 9–24V DC. Typical current consumption: 88mA at 12V DC.
What is the recommended installation height and angle?
Installation height: 2–20 meters (minimum 0.1m if flooding is not a concern). Installation angle: 40°–60° between antenna plane and water surface. For rivers without slope, 55° is recommended.
What is the antenna beam angle?
±6° to ±12° for both transmitting and receiving antennas (3dB beamwidth).
Is the device suitable for outdoor use in harsh environments?
Yes. IP67 waterproof aviation plug connector, operating temperature -40°C to +85°C.
Does it require an external antenna cover?
Yes. The radar module does not include a radome. Customers must use wave-transparent materials such as PBT or PLA, with a minimum distance of 6.22mm from the antenna surface.
What is the output data rate?
1 measurement per second (1Hz).
What are the typical applications?
River flow velocity monitoring, underground pipe network flow measurement, canal and irrigation channel monitoring, sewage and wastewater flow measurement, flood early warning systems.

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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