Dwyer PUB Series Portable Ultrasonic Flow Meter Kit
Dwyer PUB Series Portable Ultrasonic Flow Meter Kit

Dwyer PUB Series Portable Ultrasonic Flow Meter Kit

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Dwyer PUB Series Portable Ultrasonic Flow Meter Kit utilize the transit-time difference for measuring flow rates in pipes non-invasively. They are compact and lightweight instruments incorporating the latest electronics and signal processing technologies, realizing high performance and easy operation. These devices are perfect for on-the-go flow monitoring, capable of 20 hours continuous operation with built-in, rechargeable battery.

The PUB comes with a rugged carrying case with molded foam inserts while the PUF boasts an IP67 rated case to hold and protect all equipment conveniently. Their screens offer easy to read text with convenient backlight for visual comfort. The efficient layout of the function keys adds to these units’ easy to use programming. These series offer analog as well as a pulsed outputs.

Dwyer PUB Series Features

Kit Includes:

  • Converter
  • Set of Transducers
  • Transducer Holders
  • Set Transducer Cables (6.56′ (2 m))
  • 4 to 20 mA Communication Cables
  • 12 VDC Power Supply
  • Ultrasonic Coupling Grease
  • Set of Chains
  • Ruled Guide Rail
  • Test Block
  • Carrying Case

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
  • Potable Water
  • Demineralized Water
  • Glycol/water mix
  • Hydraulic System
  • Diesel Oil
  • Sea Water
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Dwyer PUB Series Specification

Service Homogeneous liquids that do not contain air bubbles capable of ultrasonic wave propagation.
Inputs Lemo connector cable from sensors.
Range 0.33 to 65.62 ft/s (0.1 to 20 m/s).
Display 240 x 64 pixel graphic display, high contrast black on white with backlight; Languages: English, French, German, Swedish, Italian, Spanish, Portuguese, Russian, Norwegian, and Dutch; 5.2″ W x 1.5″ H.
Accuracy ±0.5 to 2% of flow reading for flow rate > 0.66 ft/s (0.2 m/s) and pipe ID > 2.95″ (75 mm); ±3% of flow reading for flow rate > 0.66 ft/s (0.2 m/s) and pipe ID in range 0.512 to 2.95″ (13 to 75 mm); ±6% of flow reading for flow rate < 0.66 ft/s (0.2 m/s).
Power Requirements 9 to 24 VDC, (1) 5-Cell NiMH battery, internal, factory replaceable (continuous operation time: 20 hours with back-light and output off) (recharging time: 6.5 hours, power adapter used).
Power Consumption 10.5 W.
Power Adapter 110/240 VAC adapter. UK, US, European adapters included.
Temperature Limits -4 to 275°F (-20 to 135°C).
Outputs Analog: 1 opto-isolated output: 4 to 20 mA, 0 to 16 mA or 0 to 20 mA (selectable); Error current: 0 to 26 mA (selectable); Load resistance: 620 Ω max;
Pulse: 1 opto-isolated MOSFET relay, 150 mA max, 500 pps max, 200 Hz max.
Enclosure Rating Converter: IP54; Transducers: IP51.
Materials Flame retardant injection molded ABS plastic.
Repeatability ±0.5 % of measured value or ±0.066 ft/s (0.02 m/s).
Electrical Connections Multi-pin Lemo plugs.
Turbidity < 3% by volume of particulate content.
Permissible Air Content < 3% by volume.
Response Time < 500 ms.
Weight Unit without accessories: 2.3 lb (1.06 kg); Unit with accessories in carrying case: 13.23 lb (6.0 kg).

Download Data Sheet: Series PUB Portable Ultrasonic Flow Meter Kit

Ref: dwyer-inst.com

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