Product Description:

The DUF901-EC Doppler Wall-Mounted Ultrasonic Flowmeter is engineered for non-intrusive, accurate flow measurement in full pipes carrying dirty or aerated liquids. Designed with a clamp-on sensor, it allows for easy installation without disrupting flow. Ideal for industrial environments, the DUF901-EC supports a wide pipe diameter range (40–4000 mm) and measures flow rates from 0.05 to 12 m/s. Its wall-mounted enclosure and user-friendly configuration make it a reliable solution for continuous and demanding flow monitoring.

Whether you're working with raw sewage, chemical slurries, or mining recirculation systems, this Doppler ultrasonic flowmeter delivers precise and stable readings using advanced Doppler technology.

Key Features:

• Wide Pipe Compatibility: Supports pipe sizes from 40 mm to 4000 mm

• Non-Invasive Installation: Clamp-on transducer – no pipe cutting or system shutdown needed

• Dirty Liquid Compatibility: Handles fluids with air bubbles or suspended solids

• High-Temperature Tolerance: Operates with liquid temperatures from -35°C to 200°C

• Excellent Low-Flow Sensitivity: Accurate from as low as 0.05 m/s

• Fast Response Time: Configurable between 2–60 seconds

• Durable Build: IP66 wall-mount transmitter with fiberglass housing

• Flexible Outputs: 4-20mA, Relay, and OCT outputs

• Simple Setup: LCD display with 4-button keypad for easy configuration

• Accurate Measurement: Up to ±2.0% full-scale accuracy

Specifications:

Transmitter:

• Measurement Principle: Doppler Ultrasonic

• Flow Range: 0.05 to 12 m/s

• Accuracy: ±2.0% Full Scale

• Repeatability: 0.2% of reading

• Resolution: 0.25 mm/s

• Response Time: 2–60 seconds (configurable)

• Display: LCD 2-line x 8 characters, rate/total display

• Enclosure Rating: IP66 (EN60529)

• Power Supply: 85–265V AC or 24V DC

• Output Signals: 4-20mA, Relay, OCT

• Operating Temp: -20°C to +60°C

• Dimensions: 244(H) x 196(W) x 114(D) mm

• Weight: 2.4 kg

Transducer:

• Type: Clamp-on

• Material: Aluminum (standard) / PEEK (high temp)

• Liquid Temp Range:

  • Standard: -35°C to 85°C (short-term up to 120°C)

  • High Temp: -35°C to 200°C (short-term up to 250°C)

• Ingress Protection: IP65 / IP67 / IP68

• Cable Length: 10 m standard (extendable to 300 m)

• Pipe Diameter Range: 40 mm – 4000 mm

What’s Included:

• Wall-mounted DUF901-EC Doppler Ultrasonic Flowmeter transmitter

• Clamp-on ultrasonic transducers (standard or high-temp as selected)

• 10-meter transducer cable (standard)

• S-S belt for mounting

• Couplant gel

• User manual

• Configuration keypad (integrated)

Industries & Applications:

• Wastewater Treatment: Raw sewage, activated sludge

• Mining & Minerals: Mining recirculation water

• Pulp & Paper: Slurries and fibrous flows

• Chemical Processing: Chemical slurries, industrial waste streams

• Environmental Monitoring: Groundwater and drainage systems

• Utilities & Infrastructure: Non-potable water networks