194761 Gems Sensors Inc, 194761 Datasheet
194761
Manufacturer Part Number
194761
Description
Flow Sensor
Manufacturer
Gems Sensors Inc
Datasheet
1.155421.pdf
(3 pages)
Specifications of 194761
Accuracy
+/-10%
Operating Pressure Range
200psig At 70°F
100psi Max. At 212°f
Sensing Accuracy
Body Material
Brass
Mounting Type
3/4-inch NPT
Supply Voltage Min
4.5VDC
Sensor Output
Pulsed VDC
Port Size
0.75"
Connection Size
3/4"
Features
Visual Flow
Flow Range
5 To 30 GPM
Flow Rate Max
30GPM (US)
Flow Rate Min
5GPM (US)
Leaded Process Compatible
No
Rohs Compliant
No
Accuracy %
10%
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
F-4
Flow Rate Monitoring – RFO Type
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
Wetted Materials
Operating Pressure, Maximum Optional SS Face Plate 500 PSI
Operating Temperature,
Electronics
Viscosity, Maximum
Input Power
Output Signal
Current Consumption
Current Source Output, Max.
Frequency Output Range
Accuracy
Electrical Termination
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.
Polypropylene
4.5 to 24 VDC Pulsed Output
Body
Rotor Pin
Rotor
Lens
O-Ring
Low Flow Adaptor
Brass or Stainless Steel Body 200 PSIG (13.8 bar) @ 70°F (21°C),
Polypropylene Body
Brass or Stainless Steel Body -20°F to 212°F (-29°C to 100°C)
Polypropylene Body
– Stock Items.
Material
Stainless
Brass
Body
Steel
9/16˝-18**
Port Size
1.00˝
1.00˝
NPT
.25˝
.50˝
.25˝
.50˝
.75˝
.50˝
.75˝
1.5 to 12.0 (±7.0%)
1.5 to 12.0 (±7.0%)
1.5 to 12.0 (±7.0%)
0.1 to 1.0 (±7.0%)
0.1 to 1.0 (±7.0%)
0.1 to 1.0 (±7.0%)
Brass, 316 Stainless Steel or Polypropylene
(Hydrolytically Stable, Glass Reinforced)
Ceramic
PPS Composite, Black
Polysulfone
Viton
Glass Reinforced Polypropylene
100 PSI (6.9 bar) Max. @ 212°F (100°C)
100 PSIG (6.9 bar) @ 70°F (21°C),
40 PSI (2.8 bar) Max. @ 180°F (82°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
Low Range*
(Accuracy)
®
(Alloy Bodies); Buna N (Polypropylene Body)
—
—
—
—
1
Flow Range – GPM
Visit www.GemsSensors.com for most current information.
4.0 to 20.0 (±15.0%)
4.0 to 20.0 (±15.0%)
5.0 to 30.0 (±15.0%)
8.0 to 60.0 (±15.0%)
4.0 to 20.0 (±15.0%)
5.0 to 30.0 (±15.0%)
8.0 to 60.0 (±15.0%)
0.5 to 5.0 (±7.0%)
0.5 to 5.0 (±7.0%)
0.5 to 5.0 (±7.0%)
Standard Range
(Accuracy)
1
Number
155421
155481
156261
156262
194761
194762
165071
165075
194763
194764
Part
Don't Use - Replaced with RFO B&SS 1/4" &1/2" art
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.
Note: Improved accuracy can be achieved by calibrating the individual
RFO unit.
*With use of Low Flow Adapter supplied.
** Straight thread with O-ring seal.
See Page F-8 for more information.
2.50˝ (63.5 mm)
3.01˝ (76.4 mm)
2.50˝ (63.5 mm)
3.06˝ (77.7 mm)
(63.5 mm)
(100 mm)
2.50˝
3.94˝
1/4" NPT-.64" (16.3 mm)
1/2" NPT-.70" (17.8 mm)
3/4" NPT-.70" (17.8 mm)
.64˝ (16.3 mm)
1/4˝ PORTS =
80˝ (20.3 mm)
1/2˝ PORTS =
87˝ (22.1 mm)
File No. E45168
(26.9 mm)
1.06˝
(74.9 mm)
2.95˝
2.32˝ (58.9 mm)
2.38˝ (60.5 mm)
.80˝ (20.3 mm)
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194761 Summary of contents
Page 1
... Don't Use - Replaced with RFO B&SS 1/4" &1/2" art 0.5 to 5.0 (±7.0%) 165071 165075 4.0 to 20.0 (±15.0%) 5.0 to 30.0 (±15.0%) 194763 8.0 to 60.0 (± ...
Page 2
... FLOW OUT 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 VDC) with a frequency proportional to the flow rate ...
Page 3
... O-rings should be lubricated prior to re-assembly. Low Flow Applications A low flow adapter is supplied with all Rotorflow units used to produce accurate response at low flow rates. Install the adapter, as shown above, in the port selected for incoming flow. ...