The FD-400 Series ultrasonic
doppler flowmeters measure the
flow of liquids that contain sound
reflectors, suspended solids, or gas
bubbles larger than 100 microns.
These sophisticated instruments
automatically adjust filtering and
gain settings to produce reliable
readings in a wide range of liquid
and reflector conditions.
The FD-400 flowmeter transmitts
ultrasonic sound through the pipe
wall or from the probe tip into the
flowing liquid by using piezoelectric
crystals contained in the transducer
and probe tip. The sound is then
reflected by sonic reflectors
suspended in the liquid and
recorded by the receiver. If the
sonic reflectors are moving within
the sound transmission path, sound
waves will be reflected at a
frequency shifted (Doppler frequency)
from the transmitted frequency. The
difference between the 2 frequencies
is directly proportional to the speed
of the sonic reflectors, resulting in a
liquid flow rate that is converted to
various user-defined units.
Configuration of the FD-400 is
accomplished via the front-panel
keypad. A 2-line backlit LCD displays
rate and total in user-selected units.
Power supply options include AC
and DC. Optional outputs include
4 to 20 mA, relays, and rate pulse.
Two transducer styles are available.
The FD-400C clamp-on, non-intrusive
transducer is recommended for most
metal or plastic pipes. The FD-400C
has a NEMA 6P (IP68) rating and is
available in a high-temperature
version, "=HT". The user can place
these clamp-on transducers up to
305 m (1000') from the display
enclosure. The FD-400I insertion
probe transducer should be used
on piping systems that do not
permit ultrasonic penetration. The
FD-400I inserts into the pipe wall
and comes into direct contact with
the flowing liquid.
GENERAL Measuring Principle: Doppler ultrasonic Flow Velocity Range: 0.05 to 9 mps (0.15 to 30 fps) Accuracy: ±2% FS over calibrated span Liquid Types: Liquids containing 100 ppm of useful sonic-suspended reflectors greater than 100
MONITOR Enclosure: NEMA 4X (IP66), polycarbonate, stainless steel, brass, plated-steel mounting brackets Dimensions: 178 H x 146 W x 99 mm D (7.00 x 5.75 x 3.88") Power Supply: 115/230 Vac, 50/60 Hz ±15% @ 5 VA max; 12 to 28 Vdc @ 2.5 VA max Display: 2-line x 8-character LCD; LED backlighting; top row, 7-segment 18 mm (0.7"); bottom row, 14-segment 9 mm (0.35"); 8-digit rate, 8-digit total (resettable) Units: User configured—feet, gallons, ft3, mil-gal, meters, liters, mil ft3, m3, mil-liters, acre-feet, oil barrels (42 gallon), liquor barrels (32.5 gallons), lb, kg Rate: Interval—second, minute, hour, day Totalizer exponent: E-2 to E+6 Response Time: User selectable, 1 to 60 seconds Outputs: 4 to 20 mA, 800 Ω max; internal or external power supply; 12-bit resolution; optically isolated Dual Relay: Independently configured; form “C”, 200 Vac @ 0.5 A resistive; rate alarm, totalizer pulse, error Rate Pulse: 2 output types— 500 mVac or open collector; 2500 Hz max; 12-bit resolution; 500 mV AC into 2 kΩ min; open collector 1 A at 100 V max Multiple Meters: Synchronization provision included—used for multiple meter/single pipe system; up to 4 meters may be interconnected to 30 m (100') apart Keypad: 4 pushbutton keys Operating Temperature: General purpose, 40 to 85°C (40 to 185°F)
TRANSDUCERS Type: Compression-mode ultrasonic, 625 kHz Housing Material: Standard Clamp-On: NEMA 6P (IP68), -40 to 100°C (-40 to 210°F), CPVC, Ultem®, nylon, PVC (cable jacket), aluminum (small pipe) High-Temp Clamp-On: NEMA 4 (IP65), -40 to 200°C (-40 to 400°F), Vespel®, anodized aluminum, nickel-plated brass, PFA (cable jacket) Doppler Probe: NEMA 6 (IP67) -40 to 100°C (-40 to 210°F); 700 psi (48 bar) max, 316 SS, Ultem®, FKM, nylon, PVC (cable jacket) Optional Flexible Armored Conduit: Zinc-plated steel, PVC Cable Length: Standard Lengths: 6 m (20') standard
† All dollar amounts on this site are shown in US currency. Note: Meters come complete with wall mount bracket, NIST Certificate, and operator's manual.
Clamp-on Transducer Sets come complete with acoustic couplant.
Rate indicator/totalizer models are also available with 24 Vdc or 230 Vac power: For 24 Vdc power, add suffix "-24VDC" to model number, no additional cost. For 230 Vac power, add suffix "-230VAC" to model number, no additional cost.
FD-400C-STD sensors come with four mounting straps.
FD-400C-SML sensors do not come with mounting straps.
Armored cable and longer lengths available; consult Omega Flow Engineering.
For insertion-style transducers with 15 m (50') of cable, add suffix "-50FT" to model number, add $95 to the price.
For insertion-style transducers with 30 m (100') of cable, add suffix "-100FT" to model number, add $221 to price.
Ordering Example: (1) FD-400 Ultrasonic rate and totalizer , $1,975.00 plus (1) FD-400C-STD Standard-size clamp-on transducer set, 25 to 3050 mm (1 to 120") , $1,060.00, $1,975.00 + 1,060.00 = $3,035.00