Dwyer Instruments UFM Data sheet
Model
4-20mA
PULSE
G
F
D
CBA
1
2
3
45
E
FEMALE SMB
COAXIAL
CONNECTORS
4
-5/32
[
105.59]
1-7/64
[28.05]
3/4
[18.95]
1
-1/64
[
25.70]
2X 1/2
[12.75]
5
9/64
[
23.50]
5
9/64
[
23.40]
45/64
[17.70]
3
1/32
[
24.45]
16.4´
[5 M]
4-7/64
[104.50]
2
9/64
[
11.67]
5
9/64
[
23.33]
Ø
15/32
[
Ø12.00]
2
-7/16
[
61.73]
4
-55/64
[
123.46]
RED
B
LACK
G
REEN
WHITE
B
LUE
B
ROWN
S
HIELD
UFM
Compact Ultrasonic Flowmeter
Cost Effective, Compact & Adjustable Design, Non-Invasive
Model UFM Compact Ultrasonic Flowmeter is a low cost clamp-on, ultrasonic
flowmeter. The Model UFM implements the transit-time difference to measure f low 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
iameters ranging from 0.98 to 4.62˝ (24.89 to 117.35 mm). The screen offers easy to read
d
ext with a convenient backlight for visual comfort. This model comes with a volume pulse
t
and 4 to 20 mA flow rate output.
FLOW
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.
APPLICATIONS
• Flow measurement for heat metering
• Chilled water metering and monitoring
• Potable water metering and monitoring
• Process water metering and monitoring
Ultrasonic
Kit Includes:
Flow Transmitters,
• 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
Model UFM-1, Compact Ultrasonic Flowmeter
SPECIFICATIONS
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.
ccuracy: ±3% of flow reading for > 0.98 ft/s (> 0.3 m/s).
A
ower Requirements: 12 to 24 VDC or VAC.
P
Power Consumption: 7 W max.
Temperature Limits:
Process: 32 to 185°F (0 to 85°C);
Ambient: 32 to 122°F (0 to 50°C).
Outputs:
Analog: 1 opto-isolated: 4 to 20 mA;
Error current: 3.5 mA;
Load resistance: 620 Ω 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.
ADDITIONAL SPECIFICATIONS
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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