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RFO Type Electronic Flow Sensor0 pages
Flow Rate Monitoring – RFO Type
4.5 to 24 VDC Pulsed Output
GEMS Sensors popularized the RotorFlow’s paddlewheel design by combining high
visibility rotors with solid-state electronics that are packaged into compact, panel
mounting housings. They provide accurate flow rate output with integral visual
confirmation...all with an unprecedented price/performance ratio. RFO Types feature a
VDC pulsed output.
Typical Applications
• Water Purification/Dispensing Systems • Chemical Metering Equipment
• Lasers and Welders • Water Injection Systems
• Semiconductor Processing Equipment • Chillers and Heat Exchangers
Specifications
FLOW SENSORS – ELECTRONIC
Wetted Materials
Body
t
Rotor Pin
Rotor
Lens
O-Ring
Low Flow Adaptor
Operating Pressure, Maximum
Brass or Stainless Steel Body
t
Polypropylene Body
t
Operating Temperature,
Brass or Stainless Steel Body
Polypropylene Body
Electronics
Viscosity, Maximum
Input Power
Output Signal
t
Current Consumption
Current Source Output, Max.
Frequency Output Range
Accuracy
Electrical Termination
t
Ro H S
Brass, 316 Stainless Steel or Polypropylene
(Hydrolytically Stable, Glass Reinforced)
Ceramic
PPS Composite, Black
Polysulfone1
Viton® (Alloy Bodies); Buna N (Polypropylene Body)
Glass Reinforced Polypropylene
Optional SS Face Plate 500 PSI
200 PSIG (13.8 bar) @ 70°F (21°C),
100 PSI (6.9 bar) Max. @ 212°F (100°C)1
100 PSIG (6.9 bar) @ 70°F (21°C),
40 PSI (2.8 bar) Max. @ 180°F (82°C)
Dimensions
File No. E45168
G
EM
®
S CO PLIAN
M
T
Ro H S
G
EM
®
S CO PLIAN
M
T
Polypropylene Bodies
.64˝ (16.3 mm)
.80˝ (20.3 mm)
2.50˝ (63.5 mm)
2.38˝ (60.5 mm)
3.06˝ (77.7 mm)
-20°F to 212°F (-29°C to 100°C)
-20°F to 180°F (-29°C to 82°C)
150°F (65°C) Ambient
200 SSU
4.5 VDC to 24 VDC
4.5 VDC to 24 VDC Pulse. (Sourcing)
Pulse Rate Dependent on Flow Rate, Port Size and Range.
8 mA, No Load
70 mA
15 Hz (Low Flow) to 225 Hz (High Flow)
See Table Below
22 AWG PVC-Jacketed, 24˝ Cable. Color Coded:
Red = +VDC; Black = Ground; White = Signal Output
Brass and Stainless Steel Bodies - .25˝ and .50˝ Ports
2.50˝ (63.5 mm)
3.01˝ (76.4 mm)
1/4˝ PORTS =
80˝ (20.3 mm)
1/2˝ PORTS =
87˝ (22.1 mm)
2.32˝ (58.9 mm)
Brass Bodies – .75˝ and 1.00˝ NPT Ports
Notes:
1.t For higher pressure/temperature ratings, stainless face plates are available. Consult factory.
How To Order
For standard configurations, specify Part Number based on desired body material and
port size.
Body
Material
Port Size
NPT
Flow Range – GPM
Standard Range
(Accuracy)
Low Range*
(Accuracy)
0.1 to 1.0 (±7.0%)
0.5 to 5.0 (±7.0%)
155421
1.5 to 12.0 (±7.0%)
4.0 to 20.0 (±15.0%)
155481
0.1 to 1.0 (±7.0%)
0.5 to 5.0 (±7.0%)
156261
.50˝
1.5 to 12.0 (±7.0%)
4.0 to 20.0 (±15.0%)
156262
.75˝
—
5.0 to 30.0 (±15.0%)
—
8.0 to 60.0 (±15.0%)
194762
9/16˝-18**
0.1 to 1.0 (±7.0%)
0.5 to 5.0 (±7.0%)
165071
.50˝
1.5 to 12.0 (±7.0%)
4.0 to 20.0 (±15.0%)
165075
.75˝
—
5.0 to 30.0 (±15.0%)
194763
1.00˝
Stainless
Steel
1.06˝
(26.9 mm)
3.94˝
(100 mm)
2.95˝
(74.9 mm)
194761
1.00˝
Brass
.25˝
.50˝
.25˝
Polypropylene
2.50˝
(63.5 mm)
Part
Number
—
8.0 to 60.0 (±15.0%)
194764
High Resolution
Black Rotor
PPS composite. Each of the six
rotor arms is magnetized. A PTFE
loaded bushing ensures long life.
Don'tNote: Improved accuracy can with RFOcalibrating the1/4" &1/2" art
Use - Replaced be achieved by B&SS individual
RFO unit.
1/4" NPT-.64" (16.3
* ith use of Low Flow Adapter supplied.mm)
W
1/2" NPT-.70" (17.8 mm)
See Page F-8 for more information.(17.8 mm)
3/4" NPT-.70"
** traight thread with O-ring seal.
S
–
Stock Items.
F-4
Visit www.GemsSensors.com for most current information.
RFO Type / p1of2 / 30-JUL-14
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