Radar Flow Meter | Reliable Open Channel Flow Measurement | 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.

## Overview

The FS-LDLL-001 Radar Flow Meter from Frankstar represents a robust, non-intrusive solution for measuring water surface velocity and flow in open water bodies. Designed for enduring performance in demanding environments, this sensor eliminates common failure points associated with in-stream instruments. By combining Frequency-Modulated Continuous Wave (FMCW) ranging technology with a dedicated 24 GHz velocity radar, the unit delivers consistent data without ever touching the water, ensuring the natural flow field remains entirely undisturbed.

## Precision Technology, Non-Intrusive Design

Accurate hydrological data begins with reliable measurement. The FS-LDLL-001 achieves this through dual radar systems working in concert:

- **Ranging Radar Unit:** Utilizing FMCW technology, this element precisely determines the water level. The frequency-modulated signal provides stable distance measurements, core to calculating the cross-sectional area required for total flow computation.
- **Velocity Radar Unit:** Operating at 24 GHz, this radar captures surface velocity with high accuracy. The measurement point is focused directly in front of the device, ensuring the reading reflects the actual flow conditions without the turbulence or scour often induced by submerged sensors.

The non-intrusive design means high accuracy and excellent linearity are maintained over the entire measurement range. Because the sensor has no moving parts and no elements placed within the water column, it is inherently resistant to sediment blockage, aquatic vegetation interference, and debris entanglement—common challenges that plague traditional mechanical or pressure-based meters.

## Built for Harsh Environments

Environments that quickly incapacitate conventional flow meters are the standard operating domain for this radar flow meter. The probe’s ruggedized construction is specifically engineered to withstand conditions that would degrade, block, or destroy other instruments:

- **High Sediment Concentration:** Rivers and channels carrying heavy silt loads pose no risk of abrasion or clogging, as the sensor operates completely above the water surface.
- **Floating Vegetation and Debris:** In waterways thick with aquatic plants or storm-driven debris, the radar beam passes unimpeded. There are no propellers to foul, no pressure ports to plug.
- **Icing Conditions:** For deployments in regions experiencing severe winter freezing, the above-surface mounting ensures the sensor functions continuously even when the water body itself develops ice cover. Maintenance crews are not required to extract frozen equipment from the water for inspection.

This resilience translates directly into reliable long-term operation, reduced site visits, and markedly lower total cost of ownership over the instrument’s lifespan.

## Primary Applications

The versatility of the FS-LDLL-001 makes it a preferred instrument for professionals across multiple water resource disciplines:

- **Hydrological Stations:** Provide continuous discharge data for national and regional monitoring networks. The sensor’s stability supports the long-term data consistency required for trend analysis and water resource planning.
- **Irrigation Secondary Channels:** Water accounting in agricultural districts demands precise, low-maintenance metering. The non-contact approach prevents the measurement drift often caused by silt and algal growth in irrigation canals.
- **Stormwater and Wastewater Pipe Networks:** Monitoring combined sewer overflows, stormwater outfalls, and partially filled pipes is straightforward with a top-mounted, non-contact sensor. Operators gain accurate flow data without exposing personnel to confined space entry or hazardous conditions for sensor cleaning.
- **Natural Rivers:** From shallow mountain streams to wide lowland rivers, the unit adapts to variable flow regimes. Its immunity to bedload transport and floating organic material ensures continuous operation during flood events, when accurate peak flow data is most critical.

## User Value and Operational Benefits

Selecting the Frankstar FS-LDLL-001 Radar Flow Meter delivers tangible operational and economic advantages:

- **Reduced Maintenance Expenditure:** With no moving parts and no submerged components, routine cleaning cycles and part replacement intervals are virtually eliminated.
- **Continuous Data Integrity:** The sensor’s immunity to biofouling and sediment preserves measurement linearity over time, minimizing recalibration frequency and ensuring regulatory compliance.
- **Safer Deployments:** Installations on bridges, channel banks, or manhole rims remove the occupational safety hazards tied to in-water instrument retrieval, especially during high-flow or icy conditions.
- **Rapid Integration:** The sensor integrates into existing SCADA, telemetry, and data logger platforms, providing straightforward modernisation paths for aging monitoring networks.

## Technical Concept Summary

The measurement principle is direct and effective. The ranging radar establishes the water level. The velocity radar provides surface speed. A calculated velocity profile and known cross-sectional geometry yield discharge. The device performs this sequence without physical contact, freeze risk, or loss of accuracy due to debris accumulation.

## Inquiry and Support

Frankstar is committed to advancing ocean and water resource technology through sensor innovation and dependable field performance. Our team supports project planning from initial site assessment through installation and commissioning.

For detailed technical specifications, integration guidance, or to discuss how the FS-LDLL-001 Radar Flow Meter fits your specific monitoring application, we invite you to submit an inquiry through our official product page. A Frankstar applications engineer will respond with the information you need to make an informed purchasing decision.