173935 - GEMS SENSORS - Datasheet.Live

F-1

FLOW SENSORS – ELECTRONIC

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RotorFlow® Sensors Provide Visual Indication,

Continuous Sensing and Accurate Switching

 Bright, visual indication with choice of pulsed

DC output, or adjustable 1 amp switched output

 Flow ranges from .1 GPM to 60.0 GPM

 Compact inline housings

 Available in high performance plastic,

brass, or stainless steel housings

Determined to provide you with the most

versatile line of ﬂow sensors available, we’ve

continued a non-stop reﬁnement process for the

entire RotorFlow® Series. GEMS new generation

of RotorFlow® sensors, the RF-2500 Series,

have been totally re-engineered with a one piece

composite rotor, stronger unibody construction,

ceramic shaft and better sealing. The results

are greater durability with broader chemical,

temperature and pressure capabilities.

Today’s RotorFlow Series is state-of-the-art and

offers more options, better performance and

durability than ever before...all at an affordable

price geared for high volume, OEM applications.

Select the RotorFlow sensor that is right for your application by

choosing one of our three distinct conﬁgurations. You’ll ﬁnd details on

each of these conﬁgurations inside.

RotorFlow Switch Types

For speciﬁc ﬂow setpoint switching, RotorFlow RFS type switches are

one of the most reliable ﬂow switches available. Setpoints are fully

adjustable over the speciﬁed ﬂow range. The dynamic operation of the

rotor guards against jamming and false actuation.

RotorFlow Output Types

For ﬂow rate monitoring or metering applications. RotorFlow RFO

Type sensors provide a pulsed DC voltage output that is proportional

to the rate of ﬂow. The operating range of 4.5 to 24 VDC pulsed output

is easily integrated into most digital logic units. RFA Type RotorFlow

sensors provide a continuous 0-10 VDC analog output.

RotorFlow Indicator Types

For those who want simple visual conﬁrmation of ﬂow, RotorFlow

RFI indicators provide the durable, low-cost answer. A bright, orange

spinning rotor provides visual ﬂow conﬁrmation at a glance.

RotorFlow Series Sensors are

U.L. Recognized — File No. E45168.

Now for line

sizes up to 1˝!

New wide-body senses

ﬂow up to 60 GPM.

3/4˝ and 1˝ line models.

Brass, Stainless Steel

or High Performance,

Polypropylene Bodies

7/16˝ Hex Hub

High Resolution or

High Visibility Rotors.

Heavy Duty,

Buna N O-Rings

ROTORFLOW INTRODUCTION

Ceramic Shaft

F-2

FLOW SENSORS – ELECTRONIC

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.80

(20.3 mm)

2.38˝ (60.5 mm)

.80

(20.3 mm)

4.50˝ (114.3 mm)

3.06˝ (77.7 mm)

2.50˝ (63.5 mm)

.64˝ (16.3 mm)

2.37˝

(60.2 mm)

1/4˝ PORTS = .80˝ (20.3 mm)

1/2˝ PORTS = .87˝ (22.1 mm)

4.50˝ (114.3 mm)

3.01˝ (76.4 mm)

2.50˝ (63.5 mm)

2.32˝ (58.9 mm)

.87˝

(22.1 mm)

2.37˝

(60.2 mm)

2.50˝

(63.5 mm)

3.94˝

(100 mm)

1.06˝

(26.9 mm)

2˝

(50.8 mm)

4.76˝

(120.9 mm)

1.06˝

(26.9 mm)

Brass and Stainless Steel Bodies - .75˝ and 1.00˝ Port

Speciﬁcations

Wetted Materials

Body Brass, 316 Stainless Steel or Polypropylene

(Hydrolytically Stable, Glass Reinforced)

Rotor Pin Ceramic

Rotor PPS Composite, Black

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) Max. @ 212°F (100°C)1

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 or 115 VAC

Relay Contact Ratings (SPDT) 1 Amp, 24 VDC Resistive; 0.3 Amp, 110 VAC

Current Consumption No Load Load (Relay Energized)

24 VDC 20mA 35mA

115 VAC 45mA 95mA

Repeatability 2% Maximum Deviation

Set Point Accuracy (Factory Set) ± 5%

Set Point Differential 15% Maximum

Electrical Termination 20 AWG PVC-Jacketed, 24˝ Cable. Color Codes:

Red = +VAC/VDC, Black = Ground,

White = N.O. Contact, Brown = N.C. Contact,

Green = Common

Note:

1. Optional pulsed output available with RFS. Consult factory.

File No. E45168

Dimensions

Polypropylene Bodies

VDC VAC

Brass and Stainless Steel Bodies - .25˝ and .50˝ Port

VDC VAC

VDC

VAC

 Combines visual conﬁrmation of ﬂow

with dynamic, electronic switch operation

 Easy, adjustable switch point calibration:

a local LED signals when set point is reached

RotorFlow® Switches build an extra level of reliability and

protection into your equipment. By principle of operation,

the rotor cannot be deceived into indicating a positive

ﬂow situation when no ﬂow actually exists. Once

set to a desired actuation point, RotorFlow

will switch to a “no-ﬂow” condition should

the rotor stop for any reason.

Typical Applications

Protect expensive electronic

equipment from coolant ﬂow

failure on...

•Semiconductor

Processing Equipment

•Lasers•MedicalEquipment

•X-RayandOtherHighPowerTubes

•RoboticWeldingEquipment

Flow Set Point Switching – RFS Types

F-3

FLOW SENSORS – ELECTRONIC

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– Stock Items.

How To Order

Specify Part Number based on desired body material, port size and input power rating.

Body Port Size Flow Ranges – GPM Input Part

Material NPT Low Range* Standard Range Power Number

.25˝ 0.1 to 1.0 0.5 to 5.0 24 VDC 155425

Polypropylene 115 VAC 155876

.50˝ 1.5 to 12.0 4.0 to 20.0 24 VDC 155485

115 VAC 155886

.25˝ 0.1 to 1.0 0.5 to 5.0 24 VDC 156265

115 VAC 156266

.50˝ 1.5 to 12.0 4.0 to 20.0 24 VDC 156268

Brass 115 VAC 156269

.75˝ – 5.0 to 30.0 24 VDC 180395

115 VAC 180396

1.00˝ – 8.0 to 60.0 24 VDC 181688

115 VAC 181689

9/16-18** 0.1 to 1.0 0.5 to 5.0 24 VDC 165073

115 VAC 165074

Stainless 24 VDC 165077

Steel .50˝ 1.5 to 12.0 4.0 to 20.0 115 VAC 165078

24 VDC 181691

.75˝ – 5.0 to 30.0 115 VAC 181692

24 VDC 181693

1.00˝ – 8.0 to 60.0 115 VAC 181694

1/2" STRAIN

RELIEF HOLE

CABLE

OUTPUT

LED INDICATOR IS

ILLUMINATED WHEN

RELAY SWITCH IS

CLOSED. AIDS FIELD

CALIBRATION

SET POINT

ADJUSTMENT

00.1 .2 .3 .4 .5 .6 .7 .8 .9 1.0 2 3 4 5 10 15

00 1 2 3 4 5 10 15 20 25

1/4˝

Ports

1/4˝ Ports 1/2˝ Ports

1/2˝ Ports

Flow Rate – GPM

PSI PSI

0010 20 30 40 50 60 70 80 90 110

100

3/4˝

Ports

1.0˝ Ports

Flow Rate – GPM

PSI

Switch Set Point Calibration With LED Signal (RFS Type)

With the unit installed in the line and power supplied, complete the following steps to

calibrate switch actuation point with proper ﬂow rate. A small ﬂat-blade screwdriver is

the only tool required.

1. Adjust liquid ﬂow in the line to the rate at which switch actuation is desired.

2. Insert screwdriver into opening on backside of housing and ﬁt blade into the

potentiometer adjustment screw inside.

3. If LED is not illuminated, slowly turn screwdriver counterclockwise and stop as

soon as LED illuminates.

4. If LED is illuminated, turn screwdriver clockwise until LED light goes out. Then,

slowly turn screwdriver counterclockwise and stop as soon as LED illuminates.

Special Requirements:

GEMS caters to OEM needs with special conﬁgurations for potable water and

enhanced chemical capabilities. Consult factory for further details.

For higher pressure/temperature ratings, stainless face plates are available.

Consult factory.

* With use of Low Flow Adapter supplied. See Page F-8 for more information.

** Straight thread with O-ring seal.

High Resolution Black Rotor

PPS composite. Each of the six rotor

arms is magnetized. A PTFE loaded

bushing ensures long life.

Pressure Drop-Typical

Standard

Flow Range

Units

Low Flow

Range Units

High Flow

Units

RFS TYPE

F-4

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Body

Material

Port Size

NPT

Flow Range – GPM Part

Number

Low Range*

(Accuracy)

Standard Range

(Accuracy)

Polypropylene .25˝ 0.1 to 1.0 (±7.0%) 0.5 to 5.0 (±7.0%) 155421

.50˝ 1.5 to 12.0 (±7.0%) 4.0 to 20.0 (±15.0%) 155481

Brass

.25˝ 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%) 194761

1.00˝ — 8.0 to 60.0 (±15.0%) 194762

Stainless

Steel

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˝ — 8.0 to 60.0 (±15.0%) 194764

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 – 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 Purication/Dispensing Systems • Chemical Metering Equipment

• Lasers and Welders • Water Injection Systems

• Semiconductor Processing Equipment • Chillers and Heat Exchangers

Speciﬁcations

Wetted Materials

Body Brass, 316 Stainless Steel or Polypropylene

(Hydrolytically Stable, Glass Reinforced)

Rotor Pin Ceramic

Rotor PPS Composite, Black

Lens Polysulfone1

O-Ring Viton® (Alloy Bodies); Buna N (Polypropylene Body)

Low Flow Adaptor Glass Reinforced Polypropylene

Operating Pressure, Maximum Optional SS Face Plate 500 PSI

Brass or Stainless Steel Body 200 PSIG (13.8 bar) @ 70°F (21°C),

100 PSI (6.9 bar) Max. @ 212°F (100°C)1

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 4.5 VDC to 24 VDC

Output Signal 4.5 VDC to 24 VDC Pulse. (Sourcing)

Pulse Rate Dependent on Flow Rate, Port Size and Range.

Current Consumption 8 mA, No Load

Current Source Output, Max. 70 mA

Frequency Output Range 15 Hz (Low Flow) to 225 Hz (High Flow)

Accuracy See Table Below

Electrical Termination 22 AWG PVC-Jacketed, 24˝ Cable. Color Coded:

Red = +VDC; Black = Ground; White = Signal Output

Notes:

1. 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.

Note: Improved accuracy can be achieved by calibrating the individual

RFO unit.

* With use of Low Flow Adapter supplied.

See Page F-8 for more information.

** Straight thread with O-ring seal.

– Stock Items.

File No. E45168

Dimensions

Polypropylene Bodies

Brass and Stainless Steel Bodies - .25˝ and .50˝ Ports

Brass Bodies – .75˝ and 1.00˝ NPT Ports

High Resolution

Black Rotor

PPS composite. Each of the six

rotor arms is magnetized. A PTFE

loaded bushing ensures long life.

F-5

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Output Frequency – Hz

RFO Model – Based on Port Size

Flow Rate

(GPM) .25˝ .25˝ with

Adapter* .50˝ .50˝ with

Adapter* .75˝ 1˝

0.10 13

0.25 41

0.50 15 90

0.75 137

1.0 34 186

1.5 54 17

2.0 73 25.9

2.5 90 34

3.0 110 43

3.5 128

4.0 148 34 60

4.5 168

5.0 185 44.8 76.7 24

6.0 55 94

7.0 65.9 111

8.0 76 129 22

9.0 87.5 147

10 99 165 61 30

11 110 185

12 122 204

13 135

14 147

15 158 93 43

16 170

17 183

18 195

19 207

20 220 128 60

25 163 74

30 196 91

35 107

40 123

45 137

50 153

55 170

60 185

SENDS A VOLTAGE PULSE

WITH EACH PASS OF

MAGNETIC FIELD

HALL EFFECT SENSOR

MAGNETIZED ROTOR

FLOW IN

FLOW OUT

PARTIAL

CUTAWAY

TIME

+VDC

TIME

+VDC

TIME

+VDC

TIME

+VDC

00.1 .2 .3 .4 .5 .6 .7 .8 .9 1.0 2 3 4 5 10 15

00 1 2 3 4 5 10 15 20 25

1/4˝

Ports

1/4˝ Ports 1/2˝ Ports

1/2˝ Ports

Flow Rate – GPM

PSI PSI

0010 20 30 40 50 60 70 80 90 110

100

3/4˝

Ports

1.0˝ Ports

Flow Rate – GPM

PSI

Operating Principle

1. As liquid passes through the RotorFlow body, the magnetic rotor spins at a rate

proportional to ﬂow. This causes a series of magnetic ﬁelds (the rotor vanes) to excite

the Hall Effect sensor, producing a series of voltage pulses.

2. The output pulses (RFO) are at the same voltage level as the input (4.5 - 24 VDC)

with a frequency proportional to the ﬂow rate. The output signal can be utilized by

digital rate meters totalizers or other electronic controllers. RFA Type analog sensors

condition the output signal to 0-10 VDC.

3. RotorFlow Indicators may be mounted with ﬂow entering either port. Performance

is optimized by positioning ports at the top of the unit, in a horizontal plane.

Frequency vs. Flow Rate-Typical

Signal Output

Output signal for RFO Types is an on/off pulse of the

DC voltage supplied to the unit, it is compatible with all

digital logic families. Input voltage range is 4.5 to 24

VDC. Frequency of the output pulse is proportional to

the ﬂow rate and ranges from approximately 15 Hz at

low ﬂow to 225 Hz at high ﬂow.

Example:

Low Flow

High Flow

Note: Consult factory for ﬂow rate/frequency curves.

Pressure Drop-Typical

Standard

Flow

Range

Units

Low Flow

Range

Units

High Flow

Units

*Low Flow Adapter

RFO TYPE

F-6

FLOW SENSORS – ELECTRONIC

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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%) 230206 0.5 to 5.0 (±7.0%) 230205

.50˝ 1.5 to 12.0 (±7.0%) 230207 4.0 to 20.0 (±15.0%) 230201

Brass

.25˝ 0.1 to 1.0 (±7.0%) 230209 0.5 to 5.0 (±7.0%) 230202

.50˝ 1.5 to 12.0 (±7.0%) 230210 4.0 to 20.0 (±15.0%) 230203

.75˝ — —5.0 to 30.0 (±10.0%) 230212

1.00˝ — —8.0 to 60.0 (±15.0%) 230214

Stainless

Steel

9/16˝-18 0.1 to 1.0 (±7.0%) 230211 0.5 to 5.0 (±7.0%) 230204

.50˝ 1.5 to 12.0 (±7.0%) 230216 4.0 to 20.0 (±15.0%) 230208

.75˝ — —5.0 to 30.0 (±10.0%) 230213

1.00˝ — —8.0 to 60.0 (±15.0%) 230215

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

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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.

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

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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)

8˝ MIN

(20 CM)

Low Flow

Adapter

Incoming

Flow

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

F-9

FLOW SENSORS – ELECTRONIC

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Flow Range Pulses per Frequency

Output

Part Number

GPM Liters/m Gallon Liter 3/8˝ NPT

.13-1.3 0.5-5 12500 3300 27-275 Hz 173932

26100 6900 58-575 Hz 173931

.13-2.0 .5-7.5 17400 4600 38-575 Hz 173933

.26-4.0 1-15 8300 2200 37-550 Hz 173934

.53-7.9 2-30 3800 1000 33-500 Hz 173935

Description Part Number

Mating connector w/3 feet, 3 conductor, PVC pigtail cable 173941

Mating connector w/10 feet, 3 conductor, PVC pigtail cable 173942

.110˝

(2.8 mm)

.669˝

(17.0 mm)

FLOW

.524˝

(13.3 mm)

.866˝

(22.0 mm)

.118˝

(30.0 mm)

.197˝

(5.0 mm) 2.165˝

(55.0 mm)

OUTPUT

O Vdc

5-24Vdc

1k-2.2k ohms

CUSTOMER

SUPPLIED

(+)

Red

Black

White

(-)

.248˝

(6.3 mm)

.393˝

(10.0 mm)

.197˝

(5.0 mm)

.315˝

(8.0 mm)

.70˝

(17 mm)

3/8˝ MNPT

3/8˝ G

.110˝

(2.8 mm)

.669˝

(17.0 mm)

FLOW

.524˝

(13.3 mm)

.866˝

(22.0 mm)

.118˝

(30.0 mm)

.197˝

(5.0 mm) 2.165˝

(55.0 mm)

OUTPUT

O Vdc

5-24Vdc

2k-20k ohms

CUSTOMER

SUPPLIED

(+)

Red

Black

White

(-)

.248˝

(6.3 mm)

.393˝

(10.0 mm)

.197˝

(5.0 mm)

.315˝

(8.0 mm)

.70˝

(17 mm)

3/8˝ MNPT

3/8˝ G

2.5

0 1.50 4 52.25 3 6 7 8

FLOW RATE - GPM

Tests conducted with water flow at 68oF (20oC).

PRESSURE DROP (PSID)

FT-110 Series – TurboFlow®

Economical Flow-Rate Sensors

 Low Cost Plus High Accuracy ±3% of Reading

 Measures Low Liquid Flow Rates of .1 to 8 GPM

 Lightweight Plastic Design Enables Mounting in any Position

Gems Hall Effect turbine ﬂow rate sensor is ideal for OEM applications involving low

ﬂow liquid monitoring. The low cost coupled with 1/2% repeatability makes it an ideal

candidate for replacing dispensing timer systems. Unlike existing timing systems,

turbine technology is not inﬂuenced by changes in system pressure caused by aging

ﬁlters. The sensor’s standard power and output speciﬁcations make it easy to retroﬁt to

existing controllers.

Speciﬁcations

Wetted Materials

Body Nylon 12

Turbine Nylon 12 Composite

Bearings PTFE/15% Graphite

Operating Pressure 200 PSIG

Burst Pressure 2500 PSIG

Operating Temperature -4°F to 212°F (-20°C to 100°C)

Viscosity 32 to 81 SSU (.8 to 16 Centistokes)

Filter <50 Microns

Input Power 5 to 24 VDC @ 8mA

Output (Hz) NPN Sinking Open Collector @ 20mA Maximum

Leakage Current 10µA (Pull-Up Resistor Required)

Accuracy ±3% of Reading

Repeatability 0.5% of Full Scale

Electrical Connection Spade Terminals .110˝/.248˝ x .031˝

(2.8/6.3 x .8 mm) or 3 ft. cable

Inlet/Outlet Ports 3/8˝ NPT Male (3/8˝ G Male also available)

How To Order – Standard Models

Specify Part Number based on ﬂow range.

For 1-meter (3-ft.) cable units, add “-C” to part number

– Stock Items.

FT-110 Accessories

Consult factory for special customized OEM versions.

Dimensions

Wiring

Cable Wire Code: Red = 5 to 24 VDC

Black = Ground

Brown = Signal Output

Pressure Drop—Typical

A) Part # 173931

173932

173933

B) Part # 173934

173935

TURbOFLOW

F-10

FLOW SENSORS – ELECTRONIC

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1.11˝

(28.2 mm)

.11˝

(2.8 mm)

.43˝

(11.0 mm)

.67˝

(17.0 mm)

1.77˝

(45.0 mm)

OUTPUT

O Vdc

5-24Vdc

3k-30k ohms

CUSTOMER

SUPPLIED

Red (Pin 2)

Black (Pin 4)

White (Pin 1)

.83˝

(21.2 mm)

1/4˝ NPT

1/4˝ G

(+)

(-)

1.11˝

(28.2 mm)

.11˝

(2.8 mm)

.43˝

(11.0 mm)

.67˝

(17.0 mm)

1.77˝

(45.0 mm)

OUTPUT

O Vdc

5-24Vdc

3k-30k ohms

CUSTOMER

SUPPLIED

Red (Pin 2)

Black (Pin 4)

White (Pin 1)

.83˝

(21.2 mm)

1/4˝ NPT

1/4˝ G

(+)

(-)

1.5

200

100

150

0 0.5 2.5 31 2

0.400.13 0.660.26 0.53

250

400

350

300

2.9

1.5

0.7

2.2

3.6

5.0

4.4

FLOW RATE - L/MIN

GPM

∆ P MBAR

PSI

Pin Code: 1 = Output

2 = Supply

4 = Common

FT-210 Series – TurboFlow®

Low Flow Turbine Sensor

 Low Flow Rates .1 to 2.5 LPM and High Accuracy ±3% of Reading

 Lightweight Turbine Ensures Fast Startup

 Mounts In Any Orientation

Gems FT-210 features proven turbine technology in a small package for low ﬂow

applications. The turbine technology provides a highly repeatable sensor ideally suited

for measurement of either volume dispensing and/or ﬂow rate applications. The small

turbine reacts quickly to on/off dispensing applications. Each sensor is 100% tested,

ensuring years of service life.

Speciﬁcations

Wetted Materials

Body Nylon 12 (Grilamid TR55) or Grivory

Turbine Nylon 12 Composite

Bearings PTFE/15% Graphite

Operating Pressure 350 PSI (24 bar)

Burst Pressure 1400 PSI (97 bar)

Flow Range .026-.65 gallons/minute

0.1-2.5 liters/minute

3.4-84.5 ounces/minute

Pulses 83,200 per gallon

22,000 per liter

650 per ounce

Frequency Output 36.6-917 Hz

Operating Temperature -4°F to 212°F (-20°C to 100°C)

Viscosity 32 to 70 SSU (.8 to 16 Centistokes)

Filter <50 Microns

Input Power 5 to 24 VDC

Output (Hz) NPN Sinking Open Collector @ 20mA Maximum Leakage

Current 10μA (3K-30K Pull up resistor required)

Accuracy ±3% of Reading

Repeatability 0.5% of Full Scale

Electrical Connection 9.4mm Spacing 3-pole DIN Connector (1˝ high)

Inlet/Outlet Ports 1/4˝ NPT (1/4˝ G Male also available)

How To Order

Specify a Part Number for the Port Connection AND a Part Number for the DIN

Electrical Connection. Two Part Numbers are required for a complete part assembly.

Dimensions

Wiring

Pressure Drop—Typical

Electrical Connection

Description Part Number

1 meter DIN PVC Cable Assembly with 10K pull-up resistor 218572

Mating DIN Connector 212404

FT-210 Sensor

Body Material Port Size Part Number

Nylon 12 1/4˝ NPT 212465

1/4˝ G 212460

Grivory®1/4˝ NPT 223910

1/4˝ G 223190

F-11

FLOW SENSORS – ELECTRONIC

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00 1 2 3 4 5 6

226000

226100

Q (GPM)

PRESSURE DROP (PSI)

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6

2000

4000

6000

8000

10000

12000

FLOW RATE (GPM)

K FACTOR (pulses per gallon)

TuRbOFLOW

FT-330 Series – NSF Approved Materials

 High Accuracy: ±2% of reading

 High repeatability: ±0.5% of reading

 Overmolded electronics with integral cable strain reinforcement

 Measures ﬂow rates from .2 to 4 GPM

 Lightweight plastic design for multiple mounting positions

The FT-330 is a highly accurate and repeatable, Hall Effect turbine ﬂow sensor

designed for low ﬂow OEM applications. This low cost, NSF Std. 61 listed ﬂow sensor

is ideal for water or beverage dispensing applications or any application with water

based liquids. The 316SS shaft coupled with Delrin® bearings allows for accurate

measurements during quick dispensing cycles. The sensor’s standard power and

output speciﬁcations make it easy to retroﬁt existing controllers.

Speciﬁcations

Materials

Body Glass Reinforced PPO (Noryl)

Turbine PA Composite (Nylon)

Axle 316 Stainless Steel

Bearings Delrin® (Polyoxymethylyne, POM)

Inlet/Outlet Ports 3/8˝ NPT Male

Pressure

Operating 200 PSIG

Burst 1000 PSIG

Operating Temperature -4°F to 176°F (-20°C to 80°C)

Viscosity 32 to 81 SSU (1.8 to 16 Centistokes)

Recommended Filtration < 50 Microns

Input Power 5 to 24 VDC @ 8mA

Output (Hz) NPN Sinking Open Collector @ 25mA

Maximum leakage current 10µA

(5k to 30k Pull-Up Resistor Required)

Accuracy ±2% of reading

Repeatability ±0.5% of reading

Electrical Connection 3 ft PVC cable #22 AWG

Approvals NSF Std. 61 listed

Wiring

Dimensions

Pressure Drop—Typical

K-factor Chart* - Part Number 226000

* Consult factory for P/N 226100 K-factor chart

Flow Range Frquency

Out

Pulses Per

Gallon

Pulses Per

Liter Part Number

GPM LPM

0.2 to 2 0.8 to 7.6 34 to 343 Hz 10,313 2724 226000

0.4 to 4 1.5 to 15 29 to 343 Hz 4,994 1319 226100

0.89

REF.

0.70

3/8 NPT

CABLE 34-36" EXTENDED

3 COND. PVC

2.23

10k Ohms

CUSTOMER SUPPLIED

WHITE OUTPUT

BLACK 0 VDC

RED 5-24 VDC

FT-330 SENSOR

– Stock Items.

NSF approved

How To Order

Specify Part Number based on ﬂow rate measuring capability.

F-12

FLOW SENSORS – ELECTRONIC

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Port Size

NPTF A B C D

1/2˝ 1.13

(28.7)

2.65

(67.3)

0.62

(15.8)

3.06

(77.8)

3/4˝ 1.50

(38.1)

2.75

(69.9)

0.824

(20.9)

4.00

(101.6)

1˝ 1.50

(38.1)

2.75

(69.9)

1.05

(26.7)

4.00

(101.6)

1-1/2˝ 2.25

(57.1)

3.00

(76.2)

1.61

(40.9)

4.25

(107.9)

LABEL

3˝

(76 mm)

ØC

SENSING ELEMENT

NPTF

2 PLACES

FS-600 Series – No Moving Part, Thermal

Dispersion Flow Switch

Flow Rate Settings: 0.1 GPM to 11 GPM (0.5 LPM to 41 LPM)

Port Size: 1/2˝ to 1-1/2˝ (NPT or G thread)

Setting Type: Fixed

The FS-600 series uses proven thermal dispersion technology to provide a robust no

moving part ﬂow switch even without ﬁltration. The solid state sensor is compatible

with both conductive and non-conductive ﬂuids. Suitable for ﬂuids with particulates or

slurries, and is immune to changes in media viscosity. The straight through switch is

designed for a long life and can be mounted in any orientation and can handle a wide

range of ﬂow rates. No moving parts means years of reliable service.

Speciﬁcations

Wetted Materials

Probe 303 Stainless Steel

Flow Body 316 Stainless Steel

Operating Pressure (Max.) 363 PSIG (25 bar)

Operating Temperature -14° F to 140°F (-10°C to 60°C)

Power on Delay Time 15 Seconds Max (Output On)

Response Time 10 Seconds Max.

Inlet/Outlet Ports 1/2˝, 3/4˝, 1˝, 1-1/2˝ NPT

1/2˝, 3/4˝, 1˝, 1-1/2˝ G Internal

Operating Voltage 24 Vdc or 24Vac +/- 15%

Current Consumption Less than 50mA

Switch Contact Rating 30Vac@45mA, 42Vdc @65mA

Switch Logic Normally Open

Ingress Protection IP65

Set point Accuracy 15%

Set point Differential 20% (Max.)

Electrical Termination M12 x 1 (4-Pin) (1 meter cable included)

Approvals CE

Dimensions

Calorimetric Principle/Thermal Dispersion

The operating principle of the FS-600 ﬂow switch is based on the calorimetric

principle. The FS-600 uses the cooling effect of a ﬂowing ﬂuid or gas to monitor the

ﬂow rate. The amount of thermal energy that is removed from the tip determines the

local ﬂow rate. This temperature-based operating principle can reliably sense the ﬂow

of virtually any liquid or gas.

The sensor tip of the FS-600 ﬂow sensor houses two transistors and a heater element.

One transistor is located in the sensor tip, closest to the ﬂowing ﬂuid. This transistor

is used to detect changes in the ﬂow velocity of the liquid. The second transistor is

bonded to the cylindrical wall and is a reference for ambient ﬂuid conditions.

In order to make the sensor sense ﬂow, it is necessary to heat one of the transistors

in the probe. When power is applied, the tip of the probe is heated. As the ﬂuid starts

to ﬂow, heat will be carried away from the sensor tip. Cooling of the ﬁrst transistor

is a function of how fast heat is conducted away by the ﬂowing liquid. The difference

in temperature between the two transistors provides a measurement of ﬂuid velocity

past the sensor probe. When ﬂuid velocity is high, the temperature differential is

small. As ﬂuid velocity decreases, there is an increase in temperature differential.

Notes:

1. Standard calibration is in water with units in a horizontal position.

2. Consult Gems for special applications.

Wiring Diagram

Pin 1 (V+) - red

Pin 2 (switch) - green

Pin 4 (switch) - yellow

Pin 3 (V-) - blue

F-13

FLOW SENSORS – ELECTRONIC

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Port Size

NPT

Flow Setting Part Numbers

GPM LPM

1/2˝

0.13 0.48 230500-1-5

0.24 0.90 230500-1-10

0.35 1.31 230500-1-15

0.46 1.73 230500-1-20

0.57 2.14 230500-1-25

0.68 2.56 230500-1-30

0.79 2.98 230500-1-35

0.90 3.39 230500-1-40

1.01 3.81 230500-1-45

1.12 4.23 230500-1-50

1.23 4.64 230500-1-55

1.34 5.06 230500-1-60

3/4˝

0.35 1.31 230500-2-5

0.57 2.15 230500-2-10

0.79 2.99 230500-2-15

1.01 3.83 230500-2-20

1.23 4.67 230500-2-25

1.46 5.51 230500-2-30

1.68 6.00 230500-2-35

1.90 7.00 230500-2-40

2.12 8.00 230500-2-45

2.34 9.00 230500-2-50

2.57 10.00 230500-2-55

2.79 11.00 230500-2-60

Port Size

NPT

Flow Setting Part Numbers

GPM LPM

1˝

0.64 2.20 230500-3-5

0.97 3.20 230500-3-10

1.31 4.25 230500-3-15

1.65 5.30 230500-3-20

1.99 6.5 230500-3-25

2.32 7.5 230500-3-30

2.66 8.5 230500-3-35

3.00 9.5 230500-3-40

3.33 10.0 230500-3-45

3.67 12.0 230500-3-50

4.01 13.0 230500-3-55

4.34 14.0 230500-3-60

1-1/2˝

1.48 5.50 230500-4-5

2.28 8.5 230500-4-10

3.07 11.6 230500-4-15

3.86 14.6 230500-4-20

4.66 17.6 230500-4-25

5.45 20.6 230500-4-30

6.0 22.7 230500-4-35

7.0 26.5 230500-4-40

8.0 30.3 230500-4-45

9.0 34.1 230500-4-50

10.0 37.9 230500-4-55

11.0 41.6 230500-4-60

THERMAL DISPERSION TYPE

1.6

1.4

1.2

0.8

0.6

0.4

0.2

0 0

0 10 20 30 40 50 60 70

FLUID VELOCITY (cm/s)

FLOW RATE (GPM)

FLOW RATE (LPM)

4.5

3.5

2.5

1.5

0.5

0 0

0 10 20 30 40 50 60 70

FLUID VELOCITY (cm/s)

FLOW RATE (GPM)

FLOW RATE (LPM)

0 0

0 10 20 30 40 50 60 70

FLUID VELOCITY (cm/s)

FLOW RATE (GPM)

FLOW RATE (LPM)

3/4˝ NPT

1˝ NPT

Notes:

1. G threads are available upon request. Minimum order quantities apply. Contact factory.

2. -5 through -60 = ﬂuid velocity (cm/s)

How To Order – Standard Models

Specify Part Number based on ﬂow rates for the FS-600 Series per the following chart.

Fluid Velocity vs. Flow Rate in GPM/LPM

1/2˝ NPT Ports (1/2˝ G Port)

3/4˝ NPT and 1˝ NPT Ports (3/4˝ and 1˝ G Ports)

1-1/2˝ NPT Ports (1-1/2˝ G Ports)

Accessories

Description Part#

M12 cord Set-1 meter (Red 1, Green 2, Blue 3, Yellow 4) 22 AWG 557703-01M0

M12 cord Set-3 meter (Red 1, Green 2, Blue 3, Yellow 4) 22 AWG 557703-03M0

M12 cord Set-4 meter (Red 1, Green 2, Blue 3, Yellow 4) 22 AWG 557703-04M0

M12 cord Set-5 meter (Red 1, Green 2, Blue 3, Yellow 4) 22 AWG 557703-05M0