Doppler Flow Meter

Doppler Flow Meter

An ultrasonic Doppler flow meter is a high-precision, non-invasive device that measures fluid velocity by bouncing ultrasonic signals off suspended particles or gas bubbles within a moving liquid, calculating flow rate based on the resulting frequency shift.

To meet demanding industrial requirements, TBEL supplies both fixed and portable clamp-on units that allow quick installation without pipe cutting or process disruption. These meters deliver reliable, low-maintenance performance without creating a pressure drop, making them ideal for dirty liquids, slurries, wastewater, raw sewage, and aerated fluids containing solid particles.

AVAILABLE BRANDS:

Pulsar (UK)
Nivus(Germany)

Description

Short Description & Specifications

Flow Rate Range±0.03 m/s to 12.2 m/s (±0.1 ft/s to 40 ft/s) in most applications
Pipe SizeAny pipe ID from 12.7 mm to 4.5 m (0.5 in to 180 in)
Accuracy±2% of reading or 0.03 m/s (0.1 ft/s) whichever is greater (requires solids or bubbles minimum size of 100 microns, minimum concentration 75 ppm)
Repeatability±0.1%
Linearity±0.5%
Power Supply220 V AC 50/60 Hz | 24 V DC
Power Consumption10 W max.
Output SignalIsolated 4-20mA or 0-5 V DC (field selectable)
Control RelaysQty 2, rated 5 amp SPDT, programmable flow alarm, and/or proportional pulse
Data LoggingBuilt-in 26 million point logger (128 MB) with USB output and Windows software
Enclosure RatingNEMA4X (IP 66) polyester with a clear polycarbonate face
Operating Temperature (Electronics)-23 °C to 60 °C (-10 °F to 140 °F)
Operating Temperature (Sensor)-40 °C to 150 °C (-40 °F to 300 °F)
ApprovalsStandard CE, FM | Optional: Certified Intrinsically safe for sensor mounting in ATEX/IECEx Zone 0, Ex ia IIB T4 Ga

Features & Key Advantages

Enhanced Performance

Delivers superior flow monitoring accuracy and stability across challenging liquid applications.

Easy Installation & Setup

Designed for quick installation and simple configuration using a built-in 5-button keypad.

Non-Contacting Sensing

Clamp-on ultrasonic sensor straps outside the pipe without cutting into lines or stopping flow.

Broad Pipe Compatibility

Works reliably on a large variety of pipe materials and sizes from 12.7 mm to 4.5 m ID.

Back-Lit Display

Large, white backlit matrix clearly displays real-time flow rate, relay states, and totalizer values.

Isolated Output Options

Features an isolated 4-20mA or 0-5 V DC output alongside optional Modbus RTU or HART output.

Programmable Control Relays

Includes 2 programmable control relays rated for flow alarms or proportional pulse output.

Massive Data Logging

Built-in 128 MB data logger stores up to 26 million data points for comprehensive history tracking.

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