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Ultrasonic Flow Meter DISCONTINUED Replaced by FDT-25

Ultrasonic Flow Meter

Item# FDT-21

Ultrasonic Flow Meter FDT-21 FDT-21
  • Accuracy 1%
  • Repeatability 0.2%
  • Positive, Negative and Net Totalizer
  • 4-Line LCD Display


  • Accuracy Value ±1% of reading >(0.2m/s) 0.6 ft/s
  • Batteries Included Yes
  • Battery Type Ni-H
  • Data Logging Built-in
  • Enclosure Material ABS plastic with aluminum alloy protective carrying case
  • Linearity 0.5%
  • Measurement Type Flow
  • Measurement Units Meter
  • Media Type Most liquids including clean water
  • Number of Batteries 3
  • Number of Display Digits 7
  • Repeatability 0.2%
  • Power Source Battery
  • Velocity (±0.01 to 30 m/s) ±0.03 to 105 ft/s bi-directional
  • Tranducer Frequency 1 MHz
meter is designed to measure the fluid velocity of liquid in a full/closed pipe. It is a handheld measurement system which is both easy to install and use. The FDT-21 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-21 can be used for metallic, plastic and rubber tubes.

SPECIFICATIONS
Accuracy:
±1% of reading >(0.2m/s) 0.6 ft/s
Repeatability: 0.2%
Linearity: 0.5%
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 70°C (32 to 158°F)
    With High Temp Transducers: 0 to 160°C (32 to 320°F)
Pipe Size: DN 19 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, liter, 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: 4 x 16 english letters
Communications: RS232C (baud rate from 75 to 115,200 bps)
Transducer Cable Length: 5 m (15')
Power: 3 "AAA" Ni-H built-in batteries (included) with 90 to 230 Vac charger, fully charged lasts over 12 hrs.
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: 100 H x 66 W x 20 mm D (3.9 x 2.6 x 0.8")
Weight: 514 g (1.2 lb)
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Ultrasonic Flow Meter
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Accessories
Replacement generation 2 small pipe transducer 94g (3.32oz)
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Large pipe high temp transducer
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(Replacement) Transducer pipe clamp set for up to DN100 (4")
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Transducer pipe clamp set for up to DN200 (8")
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Transducer pipe clamp set for up to DN400 (16")
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Transducer pipe clamp set for up to DN500 (20")
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Universal power supply
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