Dwyer PUF Series Portable Ultrasonic Flow Meter Kit utilizes the transit-time difference for measuring flow rates in pipes non-invasively. It is a compact and lightweight instrument incorporating the latest electronics and signal processing technologies, realizing high performance and easy operation.

This device is capable of 20 hours of continuous operation with its built-in battery. The PUF comes with an IP67 rated carrying case with molded foam inserts to hold and protect all equipment against dust and water. The screen offers easy to read text with a convenient backlight for visual comfort. The efficient layout of the function keys add to this unit’s easy-to-use programming. The unit comes with RS232 and USB connections to allow for easy connection to any personal computer or printer.

Dwyer PUF Series Features

Kit Includes:

  • Converter
  • Set of Transducers (Both Sets for Model PUF-1001)
  • Transducer Holders
  • Set Transducer Cables (6.56 ft (2 m))
  • USB, RS232, 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.

Application

  • Treated Water
  • River Water
  • Sea Water
  • Potable Water
  • Demineralized Water
  • Glycol/water mix
  • Hydraulic System
  • Diesel Oil
Another Article:

Dwyer PUF 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).
Accuracy ± 0.5 to 2% of flow reading for flow rate > 0.66 ft/s (0.2 m/s) and Pipe ID > 3 in (75 mm). ± 3% of flow reading for flow rate > 0.66 ft/s (0.2 m/s) and Pipe ID in range 0.5 to 3 in (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 O max; Pulse: 1 opto-isolated MOSFET relay, 150 mA max, 500 pps max, 200 Hz max.
Serial Communications USB; RS-232.
Enclosure Rating Transducers: IP51; Carrying Case: IP67; Converter: IP54.
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.

Download Data Sheet: Series PUF Portable Ultrasonic Flow Meter Kit

Ref: dwyer-inst.com