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Flow Rate Monitoring  RFO Types Gems Sensors

Gems Sensors Flow Rate Monitoring

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.
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RFO Types

Gems Sensors Flow Rate Monitoring

 Flow Rate Monitoring

Overview / Design Principle: 

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. 

Applications: 

  • Water Purification/Dispensing Systems 
  • Chemical Metering Equipment 
  • Lasers and Welders 
  • Water Injection Systems 
  • Semiconductor Processing Equipment 
  • Chillers and Heat Exchangers

 

Specifications 

Wetted Materials  

Body  

Brass, 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 @ 70°F (13.8 bar@ 21°C), 100 PSI @ 212°F Max (6.9 bar @ 100°C Max) 
Polypropylene Body   100 PSIG @ 70°F (6.9 bar @ 21°C), 40 PSI Max. @ 180°F (2.8 bar Max @ 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)  
Other Specifications 
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. 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 Ordering Information
Electrical Termination    22 AWG PVC-Jacketed, 24” Cable. Color Coded: Red = +VDC, Black = Ground, White = Signal Output  

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

 

Dimensions:

Polypropylene Bodies 
 DimRFOPoly.gif 
A  .64" (16.3 mm) 
B  2.50" (63.5 mm) 
C  3.06" (77.7 mm) 
D  .80" (20.3 mm) 
E  2.38" (60.5 mm) 
Brass and Stainless Steel Bodies - .25" and .50" Port 
 DimRFO25.gif 
A  2.50" (63.5 mm) 
B  3.01" (76.4 mm) 
C  .30" (7.6 mm) 
D 

1/4" ports = .80" (20.3 mm)  
1/2" ports = .87" (22.1 mm) 
 

E  2.32" (58.9 mm) 
Brass and Stainless Steel Bodies - .75" and 1.00" Port 
 DimRFOBRS.gif 
A  2.50" (63.5 mm) 
B  3.94" (100 mm) 
C  1.06" (26.9 mm) 
D  2.95" (74.9 mm) 

 

Product Documentation

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