Dwyer UFB Series Ultrasonic Flow Transmitter Set

Dwyer UFB Series Ultrasonic Flow Transmitter Set utilizes the transit-time difference for measuring flow rates in pipes non-invasively. This is the permanent model, allowing the user to mount the converter on a surface or pipe.

The easy-to-use Dwyer Ultrasonic Flow Transmitter and lightweight design is intended for mechanical devices using ideally homogeneous liquids that contain no air pockets. The Series UFB comes with a sturdy IP65 rating, protecting it from dust and direct water contact. The Series UFB has 4 to 20 mA and pulse output capabilities.

Dwyer UFB Series Features

Kit Includes:

  • Converter
  • Set of Transducers
  • Ruled Guide Rail
  • Steel Banding
  • Banding Clips
  • Set of Transducer Cables
  • Set of High Temperature Interface Cables
  • Ultrasonic Coupling Grease

Principles Of Operation

Two sensors are placed on the exterior of the pipe, and each transmits an ultrasonic pulse through the pipe and fluid to the other. The velocity of the liquid flowing through the pipes causes the pulse to accelerate or decelerate. The difference in the transit times of the two pulses is used to calculate the flow rate. The use of transit time allows the flowmeter to be unaffected by pressure or temperature changes.


  • Treated Water
  • River Water
  • Sea Water
  • Potable Water
  • Demineralized Water
  • Glycol/water mix
  • Hydraulic System
  • Diesel Oil
  • Flow Rate
  • Datalogging

Dwyer UFB Series Specification

Service Homogeneous liquids that do not contain more than 3% of air bubbles or particulate and capable of ultrasonic wave propagation.
Inputs TNC cable from sensors.
Range 0.33 to 33 ft/s (0.1 to 10 m/s).
Accuracy ±0.5 to ±2% of flow reading of flow rate > 0.03 ft/s (0.01 m/s) and pipe OD > 3.0 in (75 mm); ±3% of flow reading for flow rate > 0.03 ft/s (0.01 m/s) and pipe OD 0.5 to 3 in (13 to 75 mm); ±6% of flow reading for flow rate < 0.03 ft/s (0.01 m/s).
Power Requirements 86 to 264 VAC (50 to 60 Hz) or 24 VAC/VDC (1 A max).
Power Consumption 10.5 W.
Temperature Limits Transducer: -4 to 275°F (-20 to 135°C); Controller: -4 to 122°F (-20 to 50°C).
Enclosure Rating IP65 when using TNC connector; Transducers IP54.
Materials Plastic ABS and aluminum.
Repeatability ±0.5 % of measured value or 0.03 ft/s (0.01 m/s).
Electrical Connections Removeable screw-in type terminal block.
Mounting Wall mounted using 3 type M4 screws.

Download Data Sheet: Series UFB Ultrasonic Flow Transmitter Set

Ref: dwyer-inst.com

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