
SIGNAL CONDITIONERS
Extended Warranty
Program
SM
FP90-1, field 
mount flow 
transmitter, $440, 
shown larger than 
actual size.
⻬ Permanent and Resettable
Totalizers
⻬ Scalable Outputs 
⻬ Relay Options 
⻬ Mounting Versatility 
⻬ Simulate Function 
⻬ 2 x 16 Character 
Dot Matrix LCD
⻬ Chemical Resistant
Enclosure and 
Self-Healing Window
⻬ Large Pushbuttons 
⻬ Clearly Marked Terminal
Labels Application
⻬ Flow Control and
Monitoring
⻬ Filtration or Softener
Regeneration
⻬ Effluent Totalization 
⻬ Pump Protection 
⻬ Feed Pump Pulsing 
⻬ Ratio Control 
⻬ Water Distribution 
⻬ Leak Detection
FP90 Series
Starts at
$
440
The FP90 Series flow transmitter 
is an advanced solution that 
converts the signal from many flow 
sensors into a 4 to 20 mA signal 
for long distance transmission. 
Configuration flexibility is maximized 
with two optional relays for process 
control, two packaging options for 
integral/pipe mount or panel 
installation, and scalability for 
virtually any flow range or 
engineering unit. State-of-the-art 
electronic design ensures long-term 
reliability, signal stability, and simple 
user setup and operation. The FP90 
can be integrally mounted to 
FP8500 Series paddlewheel 
sensors utilizing a mounting kit. 
F-31
The FP90 can be remotely used 
with the OMEGA®FP-5100, 
FP-5200, FP-5300, FP-5060, 
FP-2541, FP-5600, FP-3-1500 or 
FP-6000 flow sensors and an 
FP90UM mounting kit. The 
FP90-XP units are designed to be 
panel mounted. The three front keys 
control all programming and scaling 
of the FP90—there are no pots to 
tweak or internal adjustments to 
make. Simply enter the K-factor and 
the FP90 displays rate with fieldadjustable decimal point, mA output 
value, total (field selectable for 
resettable or non-resettable 
operation) and the date of the last 
reprogramming. The 8-digit 
alphanumeric LCD shows every 
program step in clear language, 
allowing display in any engineering 
units and timebase in seconds, 
minutes, hours or days. A special 
pushbutton sequence permits entry 
into the programming, thus 
providing security against 
unauthorized reprogramming.

SPECIFICATIONS
Compatibility: Flow Sensors 
with frequency outputs
Accuracy: ±0.5% of reading @ 25°C
Enclosure
Rating: NEMA 4X (IP65) front 
Case: PBT 
Window: Polyurethane coated
polycarbonate
Keypad: Sealed 4-key silicone rubber 
Weight: Approx. 325 g (12 oz) 
Display: Alphanumeric 2 x 16 LCD 
Update Rate: 1 second 
Contrast: User selected, 5 levels
Environmental
Operating Temperature:
-10 to 70°C (14 to 158°F)
Storage Temperature:
-15 to 80°C (5 to 176°F)
Relative Humidity:
0 to 95%, non-condensing
Electrical
Sensor Input: 
Range: 0.5 to 1500 Hz 
Sensor Power:
2-Wire: 1.5 mA @ 5 Vdc ±1% 
3 or 4 Wire: 20 mA @ 5 Vdc ±1%
Optically isolated from current loop 
short circuit protected 
Current Output: 4 to 20 mA, isolated, 
fully adjustable and reversible
Power: 12 to 24 Vdc ±10%, regulated 
Max Loop Impedance: 
50 Ω max @ 12 V, 325 Ω max @ 18 V, 
600 Ω max @ 24 V
Update Rate: 100 ms 
Accuracy: ±0.03 mA 
Relay Output: Mechanical SPDT
contacts: Hi, Lo, Pulse, Off
Maximum Voltage Rating: 
5 A @ 30 Vdc, 5 A @ 250 Vac 
resistive load 
Hysteresis: User adjustable; 
max 300 pulses/min
Open-Collector Output: 
Hi, Lo, Pulse, Off Open-collector, 
optically isolated, 50 mA max, sink, 
30 Vdc max pull-up voltage. 
Max 300 pulses/min
Recommended Reference Book: 
Flow Measurement Methods &
Applications, CM-4339, $175.
Visit omega.com/bobi 
for Additional Books
FP8501 
paddlewheel 
flow sensor, 
$245, shown 
actual size.
Accessories
MOST POPULAR MODELS HIGHLIGHTED!
FP90-2P flow transmitter, $520,
shown actual size.
Model No. Price Description 
FP90UM $53 Universal mounting kit for remote wall or pipe mount 
FP90-4X 48 NEMA 4X rear cover (panel mount)  
FP90IM 53 Integral mounting kit for mounting on top of FP85XX sensors 
FP90RC 18 RC filter (for relay use)
Standard Paddlewheel Sensors (1 fps minimum) for integral mounting 
(requires FP90IM integral mounting hardware and OMEGA fitting) ±0.2 fps accuracy
Model No. Price Description 
FP8501 $245
1
to 4" pipe, polypropylene body/titanium shaft
⁄
2
FP8502 265 5 to 8" pipe, polypropylene body/titanium shaft 
FP8503 480
Low flow paddlewheel sensors (0.3 fps minimum) for integral mounting (requires 
FP90IM integral mounting hardware and OMEGA fitting) ±0.1 fps accuracy
Model No. Price
1
to 4" pipe, PVDF body/Hastelloy C shaft
⁄
2
Housing Material Shaft Material
Rotor Pipe Size 
FP8501A $270 Polypropylene Titanium Black PVDF 0.5 to 4" 
FP8502A 290 Polypropylene Titanium Black PVDF 5 to 8" 
FP8503A 505 Natural PVDF Hastelloy C Natural PVDF 0.5 to 4"
F
MOST POPULAR MODELS HIGHLIGHTED!
To Order (Specify Model Number)
Model No. Price Description Mounting Output(s)
FP90-1 $440 Flow transmitter Field mount* 4 to 20 mA and open collector output 
FP90-2 520 Flow transmitter Field mount* 4 to 20 mA and dual relays 
FP90-3 745 Flow transmitter, dual input Field mount* 4 to 20 mA and dual open collector outputs 
FP90-1P 440 Flow transmitter Panel mount 4 to 20 mA and open collector output 
FP90-2P 520 Flow transmitter Panel mount 4 to 20 mA and dual relays 
FP90-3P 745 Flow transmitter, dual input Panel mount 4 to 20 mA and dual open collector outputs
FP90-x comes complete with operator’s manual. 
FP90-xP comes complete with mounting bracket, panel gasket, and operator’s manual.
Field mount transmitters require FP90IM internal mounting kit for FP8500 or FP8500A sensor or FP90UM for all other compatible sensors.
*
Ordering Examples: FP90-1 field mount flow transmitter, FP90IM integral mounting kit, FP8501A paddlewheel sensor, FP-5310M installation 
fitting for 1" PVC pipe, $440 + 53 + 270 + 177 = $940. 
FP90-1 field mount flow transmitter and OCW-3, OMEGACARESMextended warranty program, $440 + 110 = $550.
OMEGACARE 
placing an order. OMEGACARESMcovers parts, labor and equipment loaners.
SM 
extended warranty program is available for models shown on this page. Ask your sales representative for full details when
F-32

Flow Transmitter
FP90-XP Includes: 
mounting bracket 
and panel gasket
See list of 
compatible sensors*
Flow Transmitter
FP90
Integral Adapter Kit
FP90IM Includes: 
locking ring 
conduit base 
integral adapter
FP8501 or 
FP8501A Series
Flow Transmitter
FP90
Universal Adapter Kit
FP90UM Includes: 
locking ring
conduit base
universal adapter 
for pipe, wall
See list of 
compatible sensors*
Installation 
Fitting +
Panel Mount
96 (3.8)
Dimensions: mm (in)
96
(3.8)
Installation 
Fitting +
41
(1.6 )
Installation 
Fitting +
*The panel mount and universal mount units are 
compatible with the following sensors: 
FP-5060, FP-5100, FP-5200, FP-5300, 
FP-2540, FP-5600, FP-3-1500 and FP-6000. 
+Fittings purchased separately. 
See FP Series fittings. See pages F-37 and F-38.
Optional 
Rear Cover
Panel Output
92 x 92
(+0.8, -0)
3.6 x 3.6
(+0.031, -0)
56 
(2.2)
97 (3.8)
96 (3.8)
96 
(3.8)
Dimensions: mm (in)
82 
(3.23)
106
(4.18)
F-33

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