Wall Mount ultrasonic FloWMeter
Fꢀꢁ cꢂꢃꢄꢅ lꢆqꢇꢆdꢈ
FDT-21W
U Accuracy 1%
U Repeatability 0.2%
U Positive, Negative and
Net Totalizer
U 4-Line LCD Display
U Clamp On Transducers
U RS232 Output
FDT-21W ultrasonic flowmeter is
designed to measure the fluid
velocity of liquid in a full/closed
pipe. It is a measurement system
which is both easy to install and
use. The FDT-21W operates
E
according to the difference in the
transit time of flight measured, and
determines the flow velocity by
measuring the travel time of a pulse
from one transducer to the next.
Flow in the same direction takes
less time to travel to the second
transducer than does flow in the
opposite direction. Electroacoustic
transducers receive and emit brief
ultrasonic pulses through the liquid
of the pipe. Transducers are
vertically placed at both sides of the
measured pipe. Sensors are placed
FDT-21W shown smaller than actual size.
on the pipe and fastened by means
of a clamp. The display will quickly
show the flow velocity. The FDT-21W
can be used for metallic, plastic and
rubber tubes.
Liquid Types: Most liquids including
clean water, sea water, waste water,
chemical liquids, oil, crude oil, alcohol,
beer, and more
Suspension Concentration:
≤2(,((( ppm >may contain very small
amounts of air bubblesꢂ
Pipe Material: All metals, most plastics
and fiberglass
Security: Programmable lock-out code
Display: 4 x 16 english letters
Power: 85 to 264 Vac
SPECꢀFꢀCATꢀONS
Accuracy: 1ꢀ of reading ꢁ>(.2 m/sꢂ
(.6 ft/s
Repeatability: (.2ꢀ
Linearity: (.5ꢀ
Response Time: ( to 999 seconds
>user configuredꢂ
Velocity: > (.(1 to ꢃ( m/sꢂ (.(ꢃ to
1(5 ft/s bi-directional
Temperature Range:
Standard: ( to 7(ºC >ꢃ2 to 158ºFꢂ
With High Temp Transducers:
( to 16(ºC >ꢃ2 to ꢃ2(ºFꢂ
Communications: RS2ꢃ2C >baud rate
from 75 to 115,2(( bpsꢂ
Pipe Size: DN 2( to 1(( mm >(.75 to
4"ꢂ standard [up to DN 6((( mm >2ꢃ6"ꢂ
with optional transducers]
Transducer Frequency: 1 MHz
Rate Units (User Configured):
Meter, feet, cubic meter, cubic feet,
USA gallon, oil barrel, USA liquid barrel,
imperial liquid barrel, million
USA gallons
Transducer Cable Length: 5 m >15'ꢂ
Data Logger: Built-in, stores over
2((( lines of data
Totalizer/Calibration:
7-digit press-to-go for calibration
Housing: ABS plastic with aluminum
alloy protective carrying case
Case: NEMA 4 >IP65ꢂ
Dimensions: 1(( H x 66 W x 2( mm D
>ꢃ.9 x 2.6 x (.8"ꢂ
Weight: 514 g >1.2 lbꢂ
FDT-21W inside view.
Totalizer: 7-digit totals for positive,
negative and net flow
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