Handheld Ultrasonic Flow Meter to Measure the Fluid Velocity of Liquid in a Full/Closed Pipe

The FDT-21 ultrasonic flowmeter from OMEGA is engineered to measure the fluid velocity of liquid either in a full pipe or a closed pipe. This ultrasonic flowmeter is a handheld measurement system which is easy to install and use. It functions based on the difference in the transit time of flight measured, and also establishes the flow velocity by measuring the travel time of a pulse from one transducer to the next transducer.

Compared to the flow in the opposite direction, the flow in the same direction takes less time to travel to the second transducer. Electroacoustic transducers receive and discharge short ultrasonic pulses through the liquid of the pipe. Transducers are arranged vertically at either sides of the measured pipe. Sensors are positioned on the pipe and fixed firmly using a clamp. The display will instantly show the flow velocity. The FDT-21 can be used for plastic, metallic and rubber tubes.

Repeatability 0.2%

Four-line LCD display

Handheld ultrasonic flow meter with a 1% accuracy

RS232 output

Positive, negative and net totalizer

Clamp on transducers

Specifications

The key specifications of the FDT-21 ultrasonic flowmeter are as follows:

Repeatability: 0.2%

Response time: 0 to 999 seconds (user configured)

Accuracy: ±1% of reading >(0.2 m/s) 0.6 ft/s

Velocity: (±0.01 to 30 m/s) ±0.03 to 105 ft/s bi-directional

Linearity: 0.5%

Pipe size: DN 19 to 100 mm (0.75 to 4") standard [up to DN 6000 mm (236") with optional transducers

Temperature range:

Standard: 0 to 70 °C (32 to 158 °F)

With high temperature transducers: 0 to 160 °C (32 to 320 °F)

Transducer frequency: 1 MHz

Totalizer: Seven-digit totals for positive, negative and net flow

Display: 4 x 16 English letters

Liquid types: Most liquids including sea water, clean water, waste water, oil, chemical liquids, crude oil, beer, alcohol and more

Suspension concentration: .20,000 ppm (may contain very small amounts of air bubbles)

Pipe material: Most plastics, all metals and fiberglass

Rate units (user configured): Feet, meter, cubic feet, cubic meter, USA gallon, oil barrel, liter, USA liquid barrel, million USA gallons, imperial liquid barrel

Security: Programmable lock-out code

Transducer cable length: 5 m (15')

Weight: 514 g (1.2 lb)

Communications: RS232C (baud rate from 75 to 115,200 bps)

Data logger: Built-in, stores over 2000 lines of data

Totalizer/calibration: Seven-digit press-to-go for calibration

Dimensions: 100 H x 66 W x 20 mm D (3.9 x 2.6 x 0.8")

Case: NEMA-4 (IP65)

Power: 3 "AAA" Ni-H built-in batteries (included) with 90 to 230 Vac charger, fully charged lasts over 12 hours

Housing: ABS plastic with aluminum alloy protective carrying case

标签：Ultrasonic Flow Meters

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