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.
Specifications 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)
注: Comes complete with standard size high-temperature transducers (S2H), M2 memory storage card, two 5 meter transducer cables, transducer clamps (DN100), Allen (hex) wrench, 10 terminal spade lugs, shrink tubing, acoustic gel, and operator’s manual.
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