PRE205-UDF Doppler Ultrasonic Flowmeter
PRE205-UDF Doppler Ultrasonic Flowmeter
The PRE205-UDF Doppler Ultrasonic Flowmeter is a high-performance instrument designed for accurate measurement of flow velocity, water level, and flow conditions in a wide range of hydraulic applications. Its advanced Doppler sensing capability allows it to capture stable measurements even when the flow contains sediment, bubbles, sludge, or biological material.
PRE205-UDF Doppler Ultrasonic Flowmeter
The PRE205-UDF Doppler Ultrasonic Flowmeter is a high-performance instrument designed for accurate measurement of flow velocity, water level, and flow conditions in a wide range of hydraulic applications. Its advanced Doppler sensing capability allows it to capture stable measurements even when the flow contains sediment, bubbles, sludge, or biological material.
The system includes two main components:
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Single-Parameter Controller – IP65-protected housing with a 2.8” TFT color display, offering real-time visualization and multiple communication outputs.
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Doppler Flowmeter Sensor – IP68-rated waterproof sensor designed for long-term submersion in open channels and pipelines.
From drainage outlets to natural rivers, the PRE205-UDF Doppler Ultrasonic Flowmeter provides precise and continuous monitoring essential for environmental management and industrial compliance.
Key Features of the PRE205-UDF Doppler Ultrasonic Flowmeter
The high-level performance of the PRE205-UDF is driven by a combination of hardware durability and advanced signal-processing algorithms. Key features include:
✔ High Measurement Accuracy
Using Doppler frequency-shift technology, the flowmeter maintains excellent accuracy even in water with >20 NTU turbidity, suspended particles, or debris.
✔ Real-Time Multi-Parameter Monitoring
The system simultaneously measures:
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Flow velocity
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Water level
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Temperature
This multi-parameter capability enables precise and dynamic flow calculation.
✔ Superior Performance in Harsh Environments
The IP68-rated sensor ensures long-term underwater operation, even in:
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Wastewater
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Flooding conditions
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Heavy sediment load
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Stormwater runoff
✔ Flexible Communication Interfaces
Supporting:
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RS485 (Modbus RTU)
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4–20 mA analog output
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Switch outputs
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Optional 4G IoT module
The PRE205-UDF integrates easily with SCADA, PLCs, telemetry systems, and cloud-based software.
✔ Low Power Consumption
With power consumption below 0.4 W, the unit is ideal for:
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Remote monitoring stations
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Solar-powered systems
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Long-term environmental observation
✔ Compact and Rugged Design
The streamlined sensor and wall-mounted controller make installation simple and maintenance minimal.
Applications of the PRE205-UDF Doppler Ultrasonic Flowmeter
The PRE205-UDF is widely used in:
1. Open-Channel Flow Monitoring
Including irrigation channels, flood monitoring, and water resource management.
2. Stormwater and Rainwater Drainage Systems
Detecting overflow risks and monitoring runoff volume.
3. Municipal Sewage Outlets
Ensuring regulatory compliance for effluent discharge.
4. Industrial Wastewater Monitoring
Monitoring discharge from factories, processing plants, and treatment systems.
5. Natural Rivers and Streams
Environmental analysis, hydrology studies, and river flow modeling.
6. Non-Full Pipes
Especially where sediment or variable flow patterns make other flowmeters ineffective.
These applications are also illustrated in the product catalog with real examples such as Drainage Outlets, Rivers, Natural Streams, and Municipal Sewage Outlets.
📊 Technical Specifications of the PRE205-UDF Doppler Ultrasonic Flowmeter
Below is a complete specification set based on the original product datasheet.
1. Single-Parameter Controller
| Specifications | Details |
|---|---|
| Display Screen | 2.8″ TFT color screen, 240 × 320 |
| Communication Interface | 1 digital flowmeter interface (24 VDC + RS485) 2 passive switch outputs (up to 24 V / 1 A) 1 RS485 interface 1 analog output 4–20 mA Optional 4G IoT module |
| Storage Capacity | 128 Mbit |
| Electrical Interface | 4 × PG9 waterproof connectors 1 × USB Type-C (reserved) |
| Power Requirements | 100–240 VAC, 50/60 Hz; or 9–36 VDC |
| Operating Temperature | –20°C to +60°C |
| Dimensions | 164 mm × 146 mm × 101 mm |
| Weight | 1.5 kg |
| Installation | Wall-mounted |
2. Doppler Flowmeter Sensor
| Specifications | Details |
|---|---|
| Flow Rate Range | 0.03 m/s ~ 10 m/s |
| Measurement Accuracy | Relative error ±1%; absolute error ±0.010 m/s |
| Water Level Range | 0–2 m or 0–10 m (customizable) |
| Water Level Accuracy | ±0.5% FS (customizable) |
| Minimum Water Level | 0.02 m |
| Temperature Range | 0°C to 60°C |
| Temperature Accuracy | ±1°C |
| Protection Grade | IP68 |
| Supply Voltage | 9–36 VDC |
| Power Consumption | < 0.4 W |
| Communication Interface | RS485 |
| Response Time | < 1 second |
Why Choose the PRE205-UDF Doppler Ultrasonic Flowmeter?
The PRE205-UDF offers several advantages over traditional flowmeters:
✔ Works in dirty, turbulent, or sedimented water
✔ Long-term underwater durability
✔ Complete multi-parameter measurement
✔ Fast response time (<1 second)
✔ Stable and accurate Doppler frequency-shift technology
✔ Ideal for environmental and industrial monitoring
Its versatility, ruggedness, and advanced sensing capability make it a top choice for engineers, water authorities, and industries requiring reliable flow data.
Conclusion
The PRE205-UDF Doppler Ultrasonic Flowmeter is a powerful and dependable solution for modern flow monitoring needs. Its combination of high accuracy, IP68 durability, multi-parameter sensing, low power consumption, and advanced communication capability makes it suitable for a wide range of applications, from municipal wastewater management to natural river flow monitoring.
With increasing global demand for accurate water monitoring, the PRE205-UDF stands as a future-ready instrument capable of delivering continuous, precise, and cost-effective measurements in the most challenging environments.
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