The FDT-21 series has been discontinued. We only have limited stock of some of the accessories.
Please see the FDT-25 series as a possible alternative or contact our Technical Sales department.
FDT-21 portable ultrasonic flow 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.
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 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 aluminium alloy protective carrying case Case: NEMA-4 (IP65) Dimensions: 100 H x 66 W x 20 mm D Weight: 514
† All amounts shown in EUR, GBP, or USD Note: Comes complete with 3 "AAA" batteries, small pipe standard/high temperature (S2H)transducer, acoustic gel, tape measure, universal AC power adapter, RS-232 cable, transducer cable, rugged carrying case and operator’s manual.