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Dwyer UFM Compact Ultrasonic Flow Meter
Dwyer UFM Compact Ultrasonic Flow Meter
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Our Price: $2,166.00

Product Code: DWY-UFM-1


Model UFM Compact Ultrasonic Flowmeter is a low cost clamp-on, ultrasonic flowmeter. The Model UFM implements the transit-time difference to measure flow rates in pipes non-invasively. It is a compact and lightweight design, featuring an easily installed, all in one clamp-on unit. This unit can measure velocity and flow in pipes with outside diameters ranging from 0.98 to 4.62" (24.89 to 117.35 mm). The screen offers easy to read text with a convenient backlight for visual comfort. This model comes with a volume pulse and 4 to 20 mA flow rate output.

Two sensors located in the guiderail 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.


  • Flow Measurement for heat metering
  • Chilled Water metering and monitoring
  • Potable water metering and monitoring
  • Process water metering and monitoring


Service:Clean water with <3% by volume of particulate content
Range:0.33 to 32.8 ft/s (0.1 to 10 m/s)
Display:Backlit: 3.27" H x 0.74" W (83.1 mm x 18.8 mm), 2 line x 16 characters
Accuracy:3% of flow reading for > 0.98 ft/s (> 0.3 m/s)
Power Requirements:12 to 24 VDC or VAC
Power Consumption:
7 W max.
Temperature Limits:Process: 32 to 185F (0 to 85C)
Ambient: 32 to 122F (0 to 50C)
Outputs:Analog: 1 opto-isolated: 4 to 20 mA; Error current: 3.5 mA;
Load resistance: 620 O max;
Pulse: 1 opto-isolated MOSFET relay, 500 mA max, 166 pps max, 200 Hz max
Enclosure Rating:IP54
Enclosure Material:Plastic polycarbonate
Repeatability:0.5% of measured value
Electrical Connections:16.4' (5 m) cable
Response Time:< 1 s
Weight:2.9 lb (1.315 kg)
Agency Approvals:CE


Applicable Pipe Material:Steel, copper, or plastic
Pipe Outside Diameter:0.98 to 4.62" (24.89 to 117.35 mm)
Applicable Pipe Lining:None
Pipe Wall Thickness:0.02 to 0.39" (0.5 to 10 mm)

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