• Phone: +31 (0)165 855 655
  • Email Address: info@u-f-m.nl
Language: U-F-M Nederland U-F-M English U-F-M Germany

UFM-50 : fixed, ultrasonic clamp-on doppler flowmeter


Ultrasonic clamp-on flowmeter (Doppler)

For “problem liquids”

The UFM-50 is ideal for contaminated or aerated liquids containing more than 10 % solids or air bubbles, as a result of which other types of flowmeters are quickly damaged. This ultrasonic Doppler flowmeter is recommended for full pipes and any fluid that contains solids or bubbles, like wastewater, chemicals, acids, slurries, abrasives and viscous liquids.
Because the sensor of the UFM-50 is mounted on the exterior of the pipe or tube, it can not be affected by the medium inside. This means no maintenance, no contamination of the sensor, no obstruction to the free flow of the liquid, no pressure loss, no corrosion and no pipes that need to be opened for the installation of measuring equipment. You can mount the display housing in a convenient location nearby the installation itself.

UFM-50 ultrasonic doppler flowmeter by U-F-M | Ultrasonic Flow Management

  • measuring without opening pipes or tubes (non-invasive)
  • relatively low purchase costs
  • easy to install
  • robust sensor, waterproof case
  • suitable for almost all pipe material
  • simple menu structure
  • bi-directional
  • excellent signal processing for reliable accuracy
  • optional : datalogger with USB thumb drive-support
Recommended for liquids containing suspended solids or bubbles minimum size of 100 microns, minimum concentration 75 ppm. Sensor mounts on vertical or horizontal pipes.
For example: wastewater, chemicals, acids, slurries, abrasives and viscous liquids..
Suitable is any tube material that conducts ultrasonic sound waves such as PVC, (carbon and stainless) steel, cast iron, fiber glass and lined pipes with liner bonded to pipe wall.
Avoid pipes with loose insertion liners and pipe walls which contain air (concrete, wood etc.)
Sensor mounting on the outside of a tube or pipe (diameter ≥ 12.7 mm), placed both horizontally and vertically.
Location : 6-10 pipe diameters from elbows, tees (turbulence increasing devices) and >30 pipe diameters from pumps, controlling valves and pipe discharge.
  • Flow rate range : ± 0.1 to 40 ft/sec (± 0.03 to 12.2 m/sec) in most applications
  • Pipe size : Any pipe ID from ½” to 180″ (12.7 mm to 4.5 m)
  • Accuracy : ± 2% of scale
  • Electronics op. temp.: -10° to 140°F (-23° to 60°C)
  • Display : flow rate, relay states, 16-digit totalizer, operating mode and calibration menu
  • Calibration : Built-in 5-key calibrator
  • Power input : 100-240VAC / 50-60Hz, 5 Watts max. (with standard features)
  • Output : Isolated 4-20mA (1000 ohm load max.)
  • Enclosure : Watertight, dust tight NEMA4X (IP 66) polyester
The UFM-50 is based on the Doppler measuring principle. This means that the liquid to be measured must contain solid parts, air bubbles or a turbulent flow. To measure the flow, an acoustic signal is reflected from these (moving) particles or air bubbles to the sensor.



Do you incidently need flow measurements equipment? Rent the UFM-50 per day or per week. Perform the measurements yourself, or leave it to our service engineers.
We are happy to assist you with technical advice and support.


#ultrasonicflowmeter | U-F-M for sales, rental and service of ultrasonic clamp-on flow meters