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dynasonics ufx doppler flow meter

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Dynasonics UFX Doppler Ultrasonic Flow Meter

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Mitchell Part Number: DYJ-DUFX1-D1

Availability: Typically In stock - Call if Urgent!

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Quick Overview

Ultrasonic Flow Meter - Liquid / Water Flow Measurements

The Series UFX Doppler Flow Meter - a digital non-invasive flow meter which features an advanced ultrasonic measuring technology, providing accurate and reliable flow velocity assessments in closed piping systems. The Series UFX flow meter is a cost-effective flow measurement system for closed full pipes size ¼" (with accessory small pipe transducer) and above. The easy to use hand held transducer provides accurate flow readings on applications such as dredging systems, crude oil, sludges, and waste slurries.

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Ultrasonic flow meters using the doppler principle requires that the liquid be either solids-bearing or aerated at a minimum of 100 ppm.  The product utilizes a single, hand-held transducer which is placed on the outside of metal or plastic pipe.  Within seconds after placing the transducer, the large LCD will provide a velocity reading in either FPS (feet per second) or MPS (meters per second).  The UFX comes with a flow calculator/slide chart for conversion of velocity measurements to popular volumetric measurements.

The Series UFX flow meter utilizes an advanced ultrasonic measuring technique, providing accurate, non-invasive, fluid velocity assessment without opening the pipe. The UFX utilizes two piezoelectric crystals contained within one transducer to transmit ultrasonic energy into the fluid stream and receive reflected energy off discontinuities (suspended particles or entrained gases) within the moving liquid. Transformations that result from the energy reflections are processed and converted to fluid velocity by the UFX’s sophisticated software algorithm. The processor also controls all operations of the instrument from its ultra efficient battery management circuitry to a proprietary FIR (Finite Impulse Response) filtration program.

Easy to use flow verification instrument for industrial and municipal applications; including paper pulp stock, concrete slurries, dredging applications, primary sludge and waste activated sludge

Standard features of the DUFX include:

Flow ranges from 0.3 to 30 FPS (0.1 to 9 MPS)
Optional CE mark - rated for light industrial service
Protective carrying case includes everything required to make measuements
Digital LCD flow rate indication
Rugged splash-proof enclosure
Pipe sizes from 0.25 inches (6 mm)
Accuracy of ±2% of full scale


Product Includes Standard (1" or greater pipe diameter) transducer, acoustic couplant, batteries, and carrying case.

Electronics Specifications

Flow Range:  0.30 to 30 FPS (0.10 to 9 MPS)
Display:  Single line, four-digit LCD readout of velocity  0.9”  (18 mm) high digits, signal strength, measuring units and low battery indication  •  Accuracy:  ±2% f.s.
Temperature:  -28 to 140°F (-20 to 60°C)
Enclosure Rating:  NEMA 12X ABS plastic 
Dimensions:  7.76 H x 4 W x 1.5”  •  Weight:  1.5 pounds
Agency Approval:  FM and CE mark (pending)
Supply Voltage:  Battery powered, non-rechargeable alkaline, four ‘AA’ batteries provide over 30 hours of continuous operation

Transducer Specifications

Transducer Material:  Plated body, ULTEM 1000 sensor material 
Cable:  6.6 feet (2 meters) cable and connector
Temperature:  -40 to 180°F (-40 to 87°C)
Mounting Method:  Clamp-on style with DOW 111 coupling compound 
Humidity:  0 to 95% non-condensing


Successful application of Doppler ultrasonic flow meters relies on three physical constraints:

  1. The liquid flowing within the pipe must contain 100 ppm of useful sonic suspended reflectors - dissolved solids do not generate reflections and are not relevant.
    •  The speed of sound of the reflector must vary by greater than 10% from that of the liquid carrier.
    •  Particles must be large enough to cause longitudinal reflection. Particles greater than 35 micron size meet this criteria.
    •  In typical applications, there is often a distribution of particle sizes. If the volume of particles greater than 100 microns is 25% of the overall particle volume, then the reflectors are adequate for a Doppler ultrasonic flow meter.
    •  The reflecting material must travel at the same velocity as the fluid for good accuracy. Upward flowing pipes running at low velocities may not carry heavier reflectors at the same velocity as the carrying liquid - leading to inaccurate flow measurements.
  2. A significant portion of the ultrasound energy generated by the transducer must reach the sonic reflectors.  In the case of a clamp-on transducer, the ultrasonic transducer must be acoustically coupled to the outside of a pipe (using grease or RTV couplant) and the pipe must permit ultrasound to pass without significant attenuation.  Most pipes constructed of solid, homogenous materials meet this qualification.  Pipes that cause application difficulty include concrete pressure pipes, wooden stave pipes, Teflon-lined pipes and fiberglass reinforced pipes.  Pipes that do not readily pass ultrasound are candidates for the DP7 insertion probe transducer.
  3. The pipe must be completely filled with liquid when measurements are made.  The DFX microprocessor assumes that the pipe is completely full when it calculates flow rate.  Use on partially-filled pipes may result in inaccurate readings.
size 7.76 H x 4 W x 1.5”
Shipping Weight 4.0000
Power Supply four ‘AA’ batteries
Manufacturer Dynasonics
Manufacturer Warranty 1 Year
Mitchell Catalog Number 7LDUFX1,8LDUFX1,9LDUFX1,WBDUFX1

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