Radar Flow Velocity Meter (Surface Velocity Radar)
  • Radar Flow Velocity Meter (Surface Velocity Radar)
  • Radar Flow Velocity Meter (Surface Velocity Radar)
  • Radar Flow Velocity Meter (Surface Velocity Radar)
  • Radar Flow Velocity Meter (Surface Velocity Radar)

    • Radar Flow Measurement

    Radar Flow Velocity Meter (Surface Velocity Radar)

    Flow velocity meter for non-contact measurement of surface flow velocity in open channels and rivers

    These 24 GHz radar flow velocity sensors are designed for non-contact flow monitoring in open channels and natural rivers. They use a planar microstrip radar design together with dedicated backend processing to pull out surface-flow velocity clearly, even when the water conditions shift. The compact design works well for long-term flow monitoring in hydrology, irrigation systems, water-resource projects and urban drainage, and everything is measured without placing any equipment in the water.

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    Parameters
    • Operating Frequency 24 GHz
    • Measuring Accuracy ±1%
    • Beam Angle 12° (horizontal), 25° (vertical)
    • Operating Current < 25 mA @ 24 V or < 50 mA @ 12 V
    • Process Temperature -40 to 80 °C
    • Velocity Measuring Range 0.1 to 30 m/s
    • Measuring Distance Up to 30 m
    • Pitch Angle for Velocity Measurement 0° to 80°
    • Antenna Type Planar array antenna, 12° × 25°
    • Power Supply 9–30 VDC
    • Ingress Protection IP68
    • Housing Material Aluminum alloy
    • Mounting Method Bracket installation
    • Data Interface RS485 (Modbus), Bluetooth for parameter setup
    • Dimensions 110 × 110 × 45 mm
    • Weight 919 g
    Dimensional Drawing
    Dimensional Drawing
    Features
    • Radar flow velocity sensors use planar radar technology with a measuring range of 0.1-25 m/s and a detection distance of 0-30 m.
    • They offer several communication options, including Bluetooth, and can be set up through a WeChat mini-program, which makes system integration easier.
    • Velocity readings are fast and stable, making the sensors suitable for high-flow conditions during flood season.
    • An automatic angle-measurement function is built in, allowing installation tilt angles from 3° to 60° to be compensated for accurate velocity output.
    • The design meets IP68 protection standards and includes lightning protection for reliable outdoor operation.
    • Non-contact measurement eliminates the impact of weather, wastewater corrosion and sediment, which reduces maintenance needs.
    • Measurement and sleep modes work together to lower overall energy consumption.
    Applications
    Water Resources

    Water Resources
    Used for measuring flow velocity in rivers and open channels.

    Flood Monitoring

    Flood Monitoring
    Helpful for tracking urban flooding during the rainy season and for monitoring sudden storm floods in mountain areas.

    Environmental and Drainage Systems

    Environmental and Drainage Systems
    Can be used to monitor wastewater discharge points and underground drainage networks.

    Coastal Monitoring

    Coastal Monitoring
    Suitable for measuring surface-flow velocity in nearshore and marine environments.
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    Other Radar Sensors

    A 24 GHz planar microstrip radar combined with dedicated backend processing can extract surface-flow velocity with good stability. This type of sensor (RVM2400) performs well in open channels and natural river sections, where the water surface often changes due to debris, uneven flow or varying depth.

    The sensor measures flow velocities from 0.05 to 30 m/s with an accuracy of ±1%. This range covers both slow and high-speed conditions, allowing the sensor to follow the rapid increases in water velocity that occur during flood season while keeping the output stable, even when the flow becomes turbulent.

    FMCW millimeter-wave radar is a better option for monitoring flow velocity or flow rate without contact, as it takes measurements from above the water surface. Guided-wave radars use a probe that needs to be in direct contact with the material, which means it can't measure speed or flow from a distance. FMCW radars, on the other hand, can accurately detect water movement using Doppler or time-shift analysis, providing stable and reliable results.