Radar Flow Meter for Open Channels, Rivers & Pipes | Frankstar,
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Technical Specifications

Product Advantages

Non-Contact Radar Flow Measurement

The Radar Flow Meter adopts advanced microwave radar technology to measure surface flow velocity and calculate flow discharge without direct contact with water, avoiding the influence of sediment, floating debris, and water pollution.

High-Accuracy Flow Monitoring

Based on Doppler radar measurement principles and intelligent algorithms, the system provides accurate and stable flow velocity and flow rate measurements for rivers, channels, and open water environments.

Reliable Performance Under Harsh Conditions

The non-contact design ensures stable operation in challenging environments, including floods, high sediment concentration, strong currents, and rapidly changing water levels.

Real-Time Continuous Measurement

The radar flow meter enables automatic and continuous flow monitoring, providing real-time hydrological data for analysis, management, and decision-making.

Easy Installation & Low Maintenance

Installed above the water surface, the device eliminates the need for underwater deployment, reducing installation complexity, maintenance costs, and safety risks.

Intelligent Data Transmission & System Integration

Supports integration with RTU terminals, telemetry systems, and cloud platforms for remote monitoring, automatic data transmission, and smart water management applications.

Product Uses

• Measure surface flow velocity and calculate river discharge.
• Monitor real-time flow changes in rivers, canals, and open channels.
• Provide continuous flow data for hydrological observation.
• Support flood monitoring and early warning systems.
• Assist in water resource management and hydraulic analysis.
• Replace traditional contact flow measurement methods in complex environments.
• Integrate with water level sensors for complete flow monitoring solutions.

Product Applications

River Flow Monitoring

Used in rivers, streams, and watershed monitoring networks to measure flow velocity and discharge for hydrological analysis and forecasting.

Flood Warning & Emergency Management

Provides real-time flow information during flood events to support risk assessment, early warning, and emergency response.

Open Channel Flow Measurement

Applied in irrigation canals, drainage channels, and water diversion systems for accurate flow monitoring and water allocation management.

Smart Water Conservancy

Integrated into intelligent water management systems for automated monitoring of rivers, reservoirs, and hydraulic facilities.

Hydropower & Hydraulic Engineering

Used in hydropower stations, dams, bridges, and other hydraulic projects for flow assessment, operation management, and engineering analysis.

Urban Drainage & Stormwater Monitoring

Applied in urban waterways and drainage systems to monitor flow conditions and improve flood prevention capabilities.

Environmental & Scientific Research

Provides reliable flow data for river ecology studies, environmental flow assessment, and hydrodynamic research.

The Frankstar FS-LDLL-001 Radar Flow Meter is a high-performance sensor engineered for measuring water surface velocity and flow in open water bodies. Designed for hydrological stations, irrigation secondary channels, stormwater and wastewater pipe networks, and natural rivers, this instrument delivers reliable data in challenging field conditions where traditional contact methods often fail. Combining FMCW ranging radar with a 24 GHz velocity radar, the sensor brings together two proven radar technologies in a single, robust probe for non-intrusive, continuous flow monitoring.

How the Radar Flow Meter Works

The FS-LDLL-001 uses Frequency-Modulated Continuous Wave (FMCW) radar for precise distance measurement, paired with a dedicated 24 GHz radar for surface velocity. The measurement point is located in front of the device, which means the sensor never touches the water. This non-contact principle is critical because it eliminates disturbances to the natural flow field. As a result, measurements are highly accurate and exhibit excellent linearity, even in dynamic and uneven flow conditions. Because there are no moving parts and no submerged components, the sensor is immune to many of the common failure modes that plague mechanical or intrusive flow instruments.

Non-Intrusive Technology for Uninterrupted Monitoring

Traditional flow meters that rely on submerged sensors or mechanical parts are often vulnerable to sediment buildup, aquatic vegetation, and floating debris. The Frankstar radar flow meter solves this by keeping all sensing elements above the water surface. The design prevents blockages from high sediment concentration, avoids interference from aquatic plants, and stops debris entanglement. This means the sensor continues to deliver accurate readings in rivers with heavy silt loads, canals choked with weeds, or storm drains carrying trash and organic matter. For environmental monitoring teams and water resource managers, this translates into less maintenance, fewer site visits, and more consistent data collection.

Built for Severe Conditions

The robust probe design of the FS-LDLL-001 ensures reliable long-term operation in some of the harshest environments. Rivers with high sediment concentration, abundant floating vegetation, and severe winter icing conditions are all within its operational scope. The sensor has no openings that can freeze shut, no moving parts that can jam, and no submerged electronics that can be damaged by pressure or corrosive water. This makes it an excellent choice for northern climates where ice formation can disable traditional flow monitoring equipment for months at a time. With the Frankstar radar flow meter, agencies and operators can maintain year-round flow records without seasonal gaps.

Applications and Buyer Value

The radar flow meter is widely used for flow monitoring in hydrological stations, where reliable stage-discharge relationships are essential for flood forecasting and water resource planning. In irrigation secondary channels, the sensor helps manage water delivery and allocation with greater precision. For stormwater and wastewater pipe networks, the non-contact design is particularly valuable because these systems often carry debris, grease, and sediment that would quickly foul other sensors. Natural river monitoring programs also benefit from the sensor’s ability to measure surface velocity without disturbing the flow, preserving the integrity of hydraulic measurements.

For research institutions and engineering consultants, the FS-LDLL-001 offers a dependable solution for flow studies in challenging settings. Its high accuracy and linearity reduce uncertainty in discharge calculations, while the low maintenance nature lowers total cost of ownership. For distributors and system integrators, the product’s straightforward installation and compatibility with standard telemetry and data logging systems make it an attractive addition to flow monitoring portfolios.

Why Choose the Frankstar Radar Flow Meter?

The key advantages of the FS-LDLL-001 are clear: non-intrusive measurement that preserves natural flow, radar technology that works in darkness and adverse weather, a design that resists sediment, vegetation, and debris, and a rugged construction for extreme cold and dirty water. With no moving parts and robust housing, the sensor reduces downtime and extends service intervals. This is particularly important for remote or hard-to-access sites where frequent maintenance is costly and impractical.

Whether you are monitoring a small irrigation lateral, a major river, or an urban stormwater network, the Frankstar radar flow meter offers a reliable and efficient way to obtain accurate water surface velocity and flow data. Its durable design and advanced radar technology make it a smart investment for long-term hydrological monitoring programs.

Contact Frankstar for More Information

Frankstar is committed to supporting ocean technology and water monitoring professionals with high-quality instruments and responsive service. To learn more about the FS-LDLL-001 radar flow meter, request a quote, or discuss your specific application requirements, please contact the Frankstar team through the official website. Let us help you find the right flow measurement solution for your project.