Dwyer UFM Ultrasonic Flow Meter

Cost effective, compact ultrasonic flow meter for non-invasive flow measurement.

Retired products cannot be ordered

Please call us for a recommended replacement

View Company Reviews

Part Number

UFM-1

Manufactured

By Dwyer Instruments

Includes

FREE Ground Shipping
FREE Lifetime Tech Support

Features

For clean water with <3% by volume of particulate content
Range:0.33 to 32.8 ft/s (0.1 to 10 m/s)
Accuracy: ±3% of flow reading for > 0.98 ft/s (> 0.3 m/s)
Backlit display
Outputs:
- Analog: 1 opto-isolated: 4 to 20 mA
- Pulse: 1 opto-isolated MOSFET relay
IP54 rated enclosure
Repeatability: ±0.5% of measured value
Response Time: < 1 s
CE approved
Compatible with steel copper or plastic pipes
Pipe Outside Diameter: 0.98 to 4.62" (24.89 to 117.35 mm)
Pipe Wall Thickness: 0.02 to 0.39" (0.5 to 10 mm)

What's in the Box

Converter w/ adjustable guiderail
Set of 1.81 to 2.75” (46 to 70 mm) clamps
Set of 2 to 5” (51 to 127 mm) clamps
Set of small pipe adaptor circle clamps
Set of small pipe adaptor V clamps
Ultrasonic coupling grease

The Dwyer 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.

Principles of Operation

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.