Page 1
ULTRASONIC DOPPLER FLOWMETER
FD-400 Series
Standard
U Non-Intrusive,
Clamp-On Transducer
for Most Pipes from 6 to
3050 mm (¹⁄₃ to 120")
Inser
U
U
U
U
U
U Provisions for Up to
U NIST Certificate
tion Probe
Transducer Also
Available
Wide Measuring Rang
0.05 to 9 mps
(0.15 to 30 fps)
Accurac
y: ±2% of
Calibrated Span
Configuration and
Total
Stored in Non-Volatile
Flash ROM
NEMA 4X (IP66)
Outdoor Enc
losure
4 Meters in a Single
Piping System
e of
E
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.
FD-400, shown smaller than actual size.
FD-400C-SML, shown
smaller than actual size.
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
E-X
FD-400C-STD, shown
smaller than actual size.
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.
Page 2
SPECIFICATIONS
FD-400C-STD
(4.38)
FD-400C-SML
Coaxial cables
FD-400C-SML-HT
36.8
(1.45)
102.9
(4.05)
72.4
(2.85)
35
(1.38)
Max
Pipe
Dia.
Wall Mount
7.1 (0.28) Dia.
(4 places)
79.5
(3.31)
39.4
(1.55)
154.4 (6.08)
171.2 (6.74)
54.1
(2.13)
8.9 (0.35)
FD-400C-STD-HT
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 microns
(see page E-4 for details)
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, ft
mil ft
oil barrels (42 gallon), liquor barrels
(32.5 gallons), lb, kg
Rate:
Interval—second, minute, hour, day
Totalizer exponent: E
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
3
, mil-gal, meters, liters,
3
, m3, mil-liters, acre-feet,
-2
to E
+6
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
jacket), aluminum (small pipe)
High-Temp Clamp-On:
NEMA 4 (IP65), -40 to 200°C
(-40 to 400°F), Vespel
aluminum, nickel-plated brass,
PFA (cable jacket)
Wall Mount
®
, nylon, PVC (cable
®
, anodized
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
Power
connection
146.1
(5.75)
Transducer
connection
®
177.8
(7)
Input/
output
106.4 (4.19)
98.5 (3.88)
(3) 1/2”
conduit holes
FD-400C-STD
Coaxial cables
FD-400C-STD-HT FD-400C-SML-HT
Coaxial cables
Dimensions: mm (in)
111.3
102.9
(4.05)
48.5
(1.91)
36.8
(1.45)
Dimensions: mm (in)
43.2
(1.70)
35
(1.38)
E-X
FD-400C-SML
Coaxial cable
111.3
(4.38)
Dimensions: mm (in)
48.5
(1.91)
35
(1.38)
Max
Pipe
Dia.
79.2
(3.12)
Page 3
FD-400I-L
1.5 NPT
Wrench Flats
64 (2.5)
L
Dual Coaxial Cables
C
81
(3.18)
FD-400I-L
FD-400I-8
FD400I-18
FD-400I-28
FD-400I-38
Dimensions: mm (in)
FD-400I-48
Rate Indicator/Totalizer (Transducer Sold Separately)
To Order Visit omega.com/fd-400 for Pricing and Details
Model No. Description
FD-420
Ultrasonic rate and totalizer
Rate and totalizer with 4 to 20 mA output
Rate and totalizer with two 4 to 20 mA outputs
Rate and totalizer with 4 to 20 mA and pulse outputs
Rate and totalizer with 2 relay outputs
Rate and totalizer with 4 relay outputs
Rate and totalizer with 2 relays and a pulse output
Rate and totalizer with pulse output
Rate and totalizer with 2 pulse outputs
FD-400
FD-410
FD-411
FD-412 Rate and totalizer with 4 to 20 mA and 2 relay outputs
FD-413
FD-422
FD-423
FD-430
FD-433
Comes complete with wall mount bracket, NIST certificate and operator’s manual.
For units with 230 Vac power, add “-230VAC” to the model number, no extra charge.
For units with 24 Vdc power, add “-24VDC” to the model number, no extra charge.
Ordering Example: FD-400-230VAC, ultrasonic rate and totalizer with 230 Vac power supply.
Model
L
mm
(in)
241
(9.50)
495
(19.50)
749
(29.50)
1003
(39.50)
1257
(49.50)
C
mm
(in)
287
(11.31)
541
(21.31)
795
(31.31)
1049
(41.31)
1303
(51.31)
E
Clamp-On Transducers and Accessories
Model No. Description
FD-400C-STD
Standard-size clamp-on transducer set, 25 mm to 3 m (1 to 120
FD-400C-SML Small-pipe clamp-on transducer set, 6 to 25 mm (
FD-400C-STD-HT
FD-400C-SML-HT
For transducers with 50' cable, add “-50FT” to the model number for additional cost.
For transducers with 100' cable, add “-100FT” to the model number for additional cost.
Armored cable and longer lengths available; consult Engineering.
Ordering Example: FD-400C-STD-50FT, standard-size clamp-on transducer set and 50' cable.
Standard-size clamp-on transducer set, 25 mm to 3 m (1 to 120
Small-pipe clamp-on transducer set for up to 200°C (400°F), 6 to 25 mm (
Insertion-Style Transducers and Accessories
Model No. Description
FD-400I-8
FD-400I-18
FD-400I-28
FD-400I-38
FD-400I-48
FD-400I-CR-18
FD-400I-CR-28 Insertion crank for FD-400I-28
FD-400I-CR-38
FD-400I-CR-48
FD-400I-BV
FD-400I-SSV
For transducers with 15 m (50') cable, add “-50FT” to the model number for additional price..
For transducers with 130 m (100') cable, add “-100FT” to the model number for additional cost.
Armored cable and longer lengths available; consult Engineering.
Ordering Example: FD-400I-8-50FT, insertion transducer sensor 8" and 50' cable.
Insertion transducer sensor 203 mm (8
Insertion transducer sensor 457 mm (18
Insertion transducer sensor 711 mm (28
Insertion transducer sensor 965 mm (38
Insertion transducer sensor 1.2 m (48
Insertion crank for FD-400I-18
Insertion crank for FD-400I-38
Insertion crank for FD-400I-48
Bronze valve isolation kit 1
Stainless steel valve isolation kit 1
¹⁄₂ NPT
E-X
")
")
")
")
")
¹⁄₂ NPT
¹⁄₄
to 1")
")
")
¹⁄₄
to 1")
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