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Wall Mount Ultrasonic Flowmeter

FDT21W Series

Ultrasonic Flow Meter | Wall Mount | FDT21W Series

Ultrasonic Flow Meter | Wall Mount

$2,040.00 FDT-21W

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1 year warranty CE
  • Accuracy 1%
  • Repeatability 0.2%
  • Positive, Negative and Net Totalizer
  • 2-Line LCD Display
  • Clamp On Transducers
  • RS485 Output
  • 4 to 20 mA Output
Doppler/Transit-Time Ultrasonic Flow Meters - View related products


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 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 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.

Accuracy: ±1% of reading >(0.2 m/s) 0.6 ft/s
Repeatability: 0.2%
Linearity: 0.5%
Output: 4 to 20 mA
Response Time: 0 to 999 seconds (user configured)
Velocity: (±0.01 to 30 m/s) ±0.03 to 105 ft/s bi-directional
Temperature Range:
    Standard: 0 to 160°C (32 to 320°F)
Pipe Size: DN 20 to 100 mm (0.75 to 4") standard [up to DN 6000 mm (236") 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
Totalizer: 7-digit totals for positive, negative and net flow
Liquid Types: Most liquids including clean water, sea water, waste water, chemical liquids, oil, crude oil, alcohol, beer, and more
Suspension Concentration: ≤20,000 ppm (may contain very small amounts of air bubbles)
Pipe Material: All metals, most plastics and fiberglass
Security: Programmable lock-out code
Display: 2 x 16 english letters
Power: 85 to 264 Vac
Communications: RS485 (baud rate from 75 to 115,200 bps)
Transducer Cable Length: 5 m (15')
Data Logger: Built-in, stores over 2000 lines of data
Totalizer/Calibration: 7-digit press-to-go for calibration
Housing: ABS plastic with aluminum alloy protective carrying case
Case: NEMA 4 (IP65)
Dimensions: 29 H x 20 W x 9 cm D (11.5 x 8 x 3.5")
Weight: 514 g (1.2 lb)
Place Order(Specify Model Number)
Part Number/ Desc.
FDT-21W Star
Available In 2 Weeks
Wall mount transit-time ultrasonic flowmeter (Includes S2H transducer)
FDT-21W-S2H Star
Available In 8 Weeks
Replacement small pipe transducer
FDT-21W-M2H Star
Available In 8 Weeks
Medium pipe transducer
FDT-21W-L2H Star
8 In Stock
Large pipe transducer
FDT-21-CLAMP1 Star
1 In Stock
(Replacement) Transducer pipe clamp set for up to DN100 (4")
FDT-21-CLAMP2 Star
Available In 6 Weeks
Transducer pipe clamp set for up to DN200 (8")
FDT-21-CLAMP3 Star
6 In Stock
Transducer pipe clamp set for up to DN300 (12")
FDT-21-CLAMP4 Star
5 In Stock
Transducer pipe clamp set for up to DN400 (16")
FDT-21-CLAMP5 Star
4 In Stock
Transducer pipe clamp set for up to DN500 (20")
FDT-21-CLAMP6 Star
12 In Stock
Transducer pipe clamp set for up to DN600 (24")
1 In Stock
Set of transducer cables 15 meters long
All amounts shown in USD
Note: Comes complete with standard size high temperature transducers (S2H), M2 memory storage card, transducer cable (2 @5m), transducer clamps (DN100) , allen(hex) wrench, 10 terminal spade lugs, shrink tubing and operator’s manual.
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