
Standard 7.6 m (25 ft) 
cable included
104 (4.1)
137 (5.4)
213 (8.4)
1-1⁄4 X 11-1⁄2 
NPSM threaded 
blue cap FP5600 series sensor
Sensor body 
diameter
26.7 (1.05) 
FP5600 
FP5603 
FP5605
FP5601 
FP5604
FP5602
LOW FLOW SENSORS
⻬ High Resolution 
⻬ Low Power 
⻬ Flow Rates As Low 
⻬ Open Collector Output 
⻬ Very Low Pressure Drop
The FP-5600 and FP8500A 
series low flow sensors are high 
resolution, low power devices 
ideal for measuring flow in piping 
systems with extremely low 
velocities. Utilizing insertion 
paddlewheel technology, these 
sensors are easy to install and 
maintain. They incorporate stateof-the-art, advanced Hall-effect 
design, allowing them to operate 
with a wide range of voltages and 
current supplies. The sensors 
have a wide flow range and 
reverse polarity protection. The 
insertion design easily adapts to 
a wide range of applications.
SPECIFICATIONS
Output Signal: Open collector, sinking 
Output Frequency:
15 Hz per fps nominal
Operating Range: 0.3 to 20 fps 
Pressure/Temperature:
PP sensor housing: 180 psi @ 20°C 
(68°F), 25 psi @ 85°C (185°F)
PVDF sensor housing: 200 psi @ 20°C 
(68°F), 25 psi @ 85°C (185°F)
Power Requirements: 3.3 to 24 Vdc 
<1.5 mA @ 3.3V to 6 Vdc, 
<20 mA @ 6V to 24 Vdc
Pipe Size Range: 0.5 to 24" 
Repeatability: ±0.5% of full range 
Linearity: ±1% of full range 
Materials: Refer to ordering information
for material options available
O-rings: FKM 
Cable Type: Twisted pair, foil shield
with drain wire 
Cable Length: 7.6 m (25') 
[300 m (1000') max]
FP-5600 and
FP8500A Series
Starts at
$
270
As 0.3 fps
Recommended Reference Book:
Flow Measurement, 
GE-1400, $110.
For Additional Books
Visit omega.com/bobi
See page F-31 for compatible 
transmitter FP90.
See pages F-35 and F-36 
for required fittings.
FP8501A sensor, 
$270, shown smaller 
than actual size.
Dimensions: mm (in)
Compatible Meters:  
DPF700 (page M-5), 
DPF70 (page M-22), 
FPM-5500 (page F-43), 
FPM-5750 (omega.com/fpm-5750)
MOST POPULAR
Standard Mount Sensors (Threaded Cap)
MODELS HIGHLIGHTED!
To Order (Specify Model Number)
Model No. Price Housing Material Shaft Material Rotor Pipe Size (")
FP-5600 $330 Polypropylene Titanium Black PVDF 0.5 to 4
FP-5601 360 Polypropylene Titanium Black PVDF 5 to 8
FP-5602 380 Polypropylene Titanium Black PVDF 10 or larger
FP-5603 580 Natural PVDF Hastelloy C Natural PVDF 0.5 to 4
Integral Sensor (Use with FP90 Transmitter and FP90IM Integral Mounting Kit)
Model No. Price Housing Material Shaft Material Rotor
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
Comes complete with operator’s manual 
Ordering Examples: FP-5600, low velocity paddlewheel sensor with polypropylene
housing, titanium shaft and black PVDF rotor for 2" pipe, $330.  
FP-5603, low velocity paddlewheel sensor with PVDF housing, Hastelloy C shaft and
PVDF rotor, $580.
F-34
Pipe Size (")
F

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