F-6
FLOW SENSORS – ELECTRONIC
Visit www.GemsSensors.com for most current information.
Body
Material
Port Size
NPT
Flow Ranges – GPM
Low Range
(Accuracy)
Part
Number
Standard Range
(Accuracy)
Part
Number
Polypropylene .25˝ 0.1 to 1.0 (±7.0%) 170290 0.5 to 5.0 (±7.0%) 170280
.50˝ 1.5 to 12.0 (±7.0%) 170291 4.0 to 20.0 (±15.0%) 170281
Brass
.25˝ 0.1 to 1.0 (±7.0%) 170292 0.5 to 5.0 (±7.0%) 170282
.50˝ 1.5 to 12.0 (±7.0%) 170293 4.0 to 20.0 (±15.0%) 170283
.75˝ — —5.0 to 30.0 (±10.0%) 180407
1.00˝ — —8.0 to 60.0 (±15.0%) 182098
Stainless
Steel
9/16˝-18 0.1 to 1.0 (±7.0%) 170295 0.5 to 5.0 (±7.0%) 170285
.50˝ 1.5 to 12.0 (±7.0%) 170296 4.0 to 20.0 (±15.0%) 170286
.75˝ — —5.0 to 30.0 (±10.0%) 182097
1.00˝ — —8.0 to 60.0 (±15.0%) 182099
3.06˝ (77.7 mm)
2.50˝ (63.5 mm)
.64˝ (16.3 mm)
3.06" (77.7 mm)
2.50" (63.5 mm) .25" (6.3 mm)
.80˝ (20.3 mm)
2.38˝ (60.5 mm)
1/4" NPT-2.01" (51.1 mm)
1/2" NPT-2.21" (56.1 mm)
3/4" NPT-2.51" (63.8 mm)
1/4" NPT-.64" (16.3 mm)
1/2" NPT-.70" (17.8 mm)
3/4" NPT-.70" (17.8 mm)
Don't Use - Replaced with RFO B&SS 1/4" &1/2" art
3.01˝ (76.4 mm)
2.50˝ (63.5 mm)
2.32˝ (58.9 mm)
1/4˝ PORTS =
80˝ (20.3 mm)
1/2˝ PORTS =
87˝ (22.1 mm)
2.50˝
(63.5 mm)
3.94˝
(100 mm)
2.95˝
(74.9 mm)
1.06˝
(26.9 mm)
Flow Rate Monitoring – RFA Types
0 to 10 VDC Analog 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. RFA Types feature a
0 to 10 VDC analog output which is proportional to flow rate.
Specifications
Wetted Materials
Body Brass, 316 Stainless Steel or Polypropylene
(Hydrolytically Stable, Glass Reinforced)
Rotor Pin Ceramic
Rotor PPS Composite, Black1
Lens Polysulfone
O-Ring Viton® (Alloy Bodies); Buna N (Polypropylene Body)
Low Flow Adaptor Glass Reinforced Polypropylene
Operating Pressure, Maximum
Brass or Stainless Steel Body 200 PSIG (13.8 bar) @ 70°F (21°C),
100 PSIG (6.9 bar) @ 212°F (100°C)2
Polypropylene Body 100 PSIG (6.9 bar) @ 70°F (21°C),
40 PSI (2.8 bar) Max. @ 180°F (82°C)
Operating Temperature,
Brass or Stainless Steel Body -20°F to 212°F (-29°C to 100°C)
Polypropylene Body -20°F to 180°F (-29°C to 82°C)
Electronics 150°F (65°C) Ambient
Viscosity, Maximum 200 SSU
Input Power 24 VDC, ±10%
Output Signal 0-10 VDC Analog Signal @ 1mA, Max.
Current Consumption 25 mA, Max.
Current Source Output, Max. 10 mA
Accuracy See Table Below
Electrical Termination 22 AWG PVC-Jacketed, 24˝ Cable. Color Coded:
Red = +VDC; Black = Ground; White = Signal Output
Notes:
1. Standard on Stainless Steel bodies.
2. For higher pressure/temperature ratings stainless steel face plates are available. Consult factory.
Dimensions
Polypropylene Bodies
Brass and Stainless Steel Bodies - .25˝ and .50˝ Ports
Brass Bodies – .75˝ and 1.00˝ NPT Ports
How To Order
For standard configurations, specify Part Number based on desired body material and
port size.
High Resolution
Black Rotor
PPS composite. Each of the six
rotor arms is magnetized. A PTFE
loaded bushing ensures long life.
– Stock Items.
Typical Applications
• Water Purication/Dispensing Systems
• Chemical Metering Equipment
• Lasers and Welders
• Water Injection Systems
• Semiconductor Processing Equipment
• Chillers and Heat Exchangers
F-7
FLOW SENSORS – ELECTRONIC
Visit www.GemsSensors.com for most current information.
Body
Material
Port Size
NPT
Flow Ranges – GPM Part Number
Low* Range Standard Range
Polypropylene .25˝ 0.1 to 1.0 0.5 to 5.0 155420
.50˝ 1.5 to 12.0 4.0 to 20.0 155480
Brass
.25˝ 0.1 to 1.0 0.5 to 5.0 142541
.50˝ 1.5 to 12.0 4.0 to 20.0 142542
.75˝ — 5.0 to 30.0 180392
1.00˝ — 8.0 to 60.0 181681
Stainless
Steel
9/16˝ - 18** 0.1 to 1.0 0.5 to 5.0 174596
.50˝ 1.5 to 12.0 4.0 to 20.0 173138
.75˝ — 5.0 to 30.0 181682
1.00˝ — 8.0 to 60.0 181683
.80˝ (20.3 mm) .30˝ (7.6 mm)
1.37˝ (34.8 mm)
3.06˝ (77.7 mm)
2.50˝ (63.5 mm)
.64˝ (16.3 mm)
3.01˝ (76.4 mm)
2.50˝ (63.5 mm)
1.37˝
(34.8 mm)
1/4˝ PORTS =
80˝ (20.3 mm)
1/2˝ PORTS =
87˝ (22.1 mm)
.30˝ (7.6 mm)
2.50˝
(63.5 mm)
3.94˝
(100 mm)
2˝
(50.8 mm)
1.06˝
(26.9 mm)
Visual Indicators – RFI Types
This is RotorFlow in its most basic form — a bright orange rotor turning with
fluid flow. Simple, direct and reliable. Flow rate is estimated, or simply confirmed,
by viewing the speed of the turning rotor. Either port may be used for incoming flow,
and bayonet mounting lens is easily removed for quick cleanout. RFI Type RotorFlow
sensors are easy to see, easy to install and easy to afford.
Typical Applications
• Visual ow conrmation on heat exchangers • Plastic injection molding equipment
Specifications
Wetted Materials
Body Brass, 316 Stainless Steel or Polypropylene
(Hydrolytically Stable, Glass Reinforced)
Rotor Pin Ceramic
Rotor High Visibility Orange, Molded Nylon
Lens Polysulfone
O-Ring Viton® (Brass Body); Buna N (Polypropylene Body)
Low Flow Adaptor Glass Reinforced Polypropylene
Operating Pressure,
Brass or Stainless Steel Body 100 PSIG (7 bar) @212°F (100°C)
200 PSIG (13.8 bar) Max. @ 70°F (21°C)
Polypropylene Body 100 PSIG (6.9 bar) at 70°F (21°C),
40 PSI (2.8 bar) Max. @ 180°F (82°C)
Operating Temperature,
Brass or Stainless Steel Body -20°F to 212°F (-29°C to 100°C)
Polypropylene Body -20°F to 180°F (-29°C to 82°C)
Operating Principle
1. As liquid passes through the RotorFlow body, the rotor spins at a rate proportional
to flow.
2.
RotorFlow Indicators may be mounted with flow entering either port. At low flow
rates, performance is optimized by positioning ports at the top of the unit, in a
horizontal plane.
How To Order
Specify Part Number based on desired body material and port size.
* With use of Low Flow Adapter supplied. See Page F-8 for more information.
** Straight thread with O-ring seal.
– Stock Items.
Dimensions
Polypropylene Bodies
Brass and Stainless Steel Bodies - .25˝ and .50˝ Ports
Brass Body – .75˝ and 1.00˝ Ports
High Visibility
Orange Rotor
Constructed of Molded Nylon
for good general purpose
compatibility with a wide range
of uids. Offers high visibility.
RFA/RFI TYPES
F-8
FLOW SENSORS – ELECTRONIC
Visit www.GemsSensors.com for most current information.
Rotorflow® Type O-Ring
Material
in Kit
Part Numbers
Line
Size
Body
Material
RFA/RFO/
RFS RFI
1/4˝ & 1/2˝ Plastic Buna-N 155870 155872
Brass/SS Viton®167364 166267
3/4˝ & 1˝ Brass/SS Viton®182695 157187
8˝ MIN
(20 CM)
Low Flow
Adapter
Incoming
Flow
2.50˝ (63.5 mm)
2.50˝ (63.5 mm)
2.50˝ (63.5 mm)
8˝ MIN
(20 CM)
Low Flow
Adapter
Incoming
Flow
2.50˝ (63.5 mm)
2.50˝ (63.5 mm)
2.50˝ (63.5 mm)
Easy Installation and Maintenance
A proper installation will enhance RotorFlow sensor performance. Install using
standard pipe fitting tools; horizontal fluid lines are recommended. For further
installation and maintenance recommendations, refer to one of the following
instruction bulletins: RFO Types–Part Number 157258; RFI Types–Part Number
157259; RFS Types–Part Number 157261.
Since their function is to monitor dynamic fluid flow, naturally the rotor will react to
turbulence, pulsation, entrained air, and other flow anomalies induced in the flow
stream by other process hardware. For optimum performance, install RotorFlow units
where nominal flow conditions exist with ports located at the top. Incoming flow may
be placed to either port; a minimum of 8 inches (20 cm) of straight pipe on the inlet
side is required. When operating in the low flow range, the supplied Low Flow Adapter
must be installed in the incoming port.
Except for straight-thread versions, RotorFlow sensors connect to piping via NPT
mating thread forms.. The use of an appropriate thread sealant is necessary to assure
a leak-tight connection. Permatex “No More Leaks®” or 2 wraps of Teflon® tape are
the only sealants recommended for GEMS flow sensors. Straight-thread versions
require an O-ring for sealing.
150 micron filtration is recommended. However, should foreign particles enter the
RotorFlow sensor, accumulation is easily cleared by removing the lens from the body.
The lens is removed by turning its 7/16˝ hex center hub 45° counter-clockwise with
a standard socket wrench. To reinstall the lens, simply reverse the process. Pressure
must be relieved from the system prior to sensor clean-out. O-rings should be
lubricated prior to re-assembly.
Low Flow Applications
A low flow adapter is supplied with all Rotorflow units. It is used to produce accurate
response at low flow rates. Install the adapter, as shown above, in the port selected
for incoming flow.
RotorFlow® Sensor Special Capabilities
are Yours for the Asking.
Gems caters to OEM needs with special configurations
that go beyond the standards in this catalog. We can
provide RotorFlow sensors with enhanced chemical
compatibility, higher temperature and pressure
capabilities, and alternate electrical terminations.
Other Capabilities Available to OEMs:
• Electricaloutputs:Combinedswitchandfrequency;
transistor switching; 0-10 VDC analog.
• Customfaceplate
(cast stainless steel
face plate pictured)
Panel Mounting
Plastic Bodies. Two (2) mounting ears are provided
at the body center line to receive #8 self-tapping
screws to accommodate panel mounting of the plastic
RotorFlow units. Note: ANSI T type 23 self-tapping
screws are recommended. They may be replaced with
standard machine screws if re-installation should be
required.
Brass and Stainless Steel Bodies. Two (2) mounting
holes are provided on the body centerline, as shown
below. #8-32UNC-2B screws are required for mounting.
RotorFlow® Maintenance Kits
Rebuild your RotorFlow® Sensors and Switches in less
than 5 minutes with one of these kits.
Includes:
• CeramicRotorPin
• 6-PoleMagneticRotorwithPPS/PTFEBushing
• BunaNorViton® O-Ring
• PolysulfoneLens
– Stock Items.
Polysulfone, Stainless Steel
or Polypropylene Lens
Buna N, Viton, EPDM,
Silicon or Other Material
O-Rings
PPS Composite
with Teflon® or Nylon
Loaded Bushing
Panel Mounting
Tabs
Long-Life
Ceramic
Rotor Pin
Hydrolytically Stable
Polypropylene, Stainless
Steel or Brass
We are committed to providing our customers with the
product that best meets the requirements of their
applications. Please call us and tell us what you need,
and ask us about Swagelok® tube fittings, faceplate
options, and 9/16˝ and 3/4˝ straight-thread versions.
Call 800-378-1600
RF-2500 Sensors