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RFO Type Electronic Flow Sensor

Brand: Gems Sensors, Inc

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. 

RFO Types feature a 4.5 to 24 Vdc pulsed output.
Features
  • 4.5 to 24 VDC Pulsed Output

1 - 10 of 10 Part Numbers
155421
155421
  • Body Material - Polypropylene
  • Port Size - 1/4" NPT
  • Flow Range (GPM) - Low Range (Accuracy): 0.1 to 1.0 (± 7.0%), Standard Range (Accuracy): 0.5 to 5.0 (± 7.0%)
155481
155481
  • Body Material - Polypropylene
  • Port Size - 1/2" NPT
  • Flow Range (GPM) - Low Range (Accuracy): 1.5 to 12.0 (± 7.0%), Standard Range (Accuracy): 4.0 to 20.0 (± 15.0%)
156261
156261
  • Body Material - Brass
  • Port Size - 1/4" NPT
  • Flow Range (GPM) - Low Range (Accuracy): 0.1 to 1.0 (± 7.0%), Standard Range (Accuracy): 0.5 to 5.0 (± 7.0%)
156262
156262
  • Body Material - Brass
  • Port Size - 1/2" NPT
  • Flow Range (GPM) - Low Range (Accuracy): 1.5 to 12.0 (± 7.0%), Standard Range (Accuracy): 4.0 to 20.0 (± 15.0%)
165071
165071
  • Body Material - Stainless Steel
  • Port Size - 9/16"-18 NPT
  • Flow Range (GPM) - Low Range (Accuracy): 0.1 to 1.0 (± 7.0%), Standard Range (Accuracy): 0.5 to 5.0 (± 7.0%)
165075
165075
  • Body Material - Stainless Steel
  • Port Size - 1/2" NPT
  • Flow Range (GPM) - Low Range (Accuracy): 1.5 to 12.0 (± 7.0%), Standard Range (Accuracy): 4.0 to 20.0 (± 15.0%)
194761
194761
  • Body Material - Brass
  • Port Size - 3/4" NPT
  • Flow Range (GPM) - Standard Range (Accuracy): 5.0 to 30.0 (± 15.0%)
194762
194762
  • Body Material - Brass
  • Port Size - 1" NPT
  • Flow Range (GPM) - Standard Range (Accuracy): 8.0 to 60.0 (± 15%)
194763
194763
  • Body Material - Stainless Steel
  • Port Size - 3/4" NPT
  • Flow Range (GPM) - Standard Range (Accuracy): 5.0 to 30.0 (± 15.0%)
194764
194764
  • Body Material - Stainless Steel
  • Port Size - 1" NPT
  • Flow Range (GPM) - Standard Range (Accuracy): 8.0 to 60.0 (± 15%)
1 - 10 of 10 Part Numbers

Specifications

Accuracy

  • ± 15 %
  • ± 7 %

Ambient Temperature Range

  • Electronics: 65° C (150° F)

Applications

  • Chemical Metering Equipment
  • Chillers & Heat Exchangers
  • Lasers & Welders
  • Semiconductor Process Tools
  • Water Purification / Dispensing / Injection Systems

Approvals & Certifications

  • CE
  • RoHS
  • UR (C,US): File No. E45168

Consumption

  • Current Consumption: 8 mA, No Load

Electrical Connectors

  • 22 AWG with PVC-Jacketed, 24” (61 cm)

Enclosure Finish

  • Rotor: Black

Enclosure, Body Material

  • 316 Stainless Steel
  • Brass
  • Polypropylene
  • Stainless Steel

Flow Rate

  • 0.1 to 60 gpm

Frequency

  • Frequency Output Range: 15 to 225 Hz

Input Power

  • 4.5-24 Vdc

Lens

  • Polysulfone

Materials of Construction

  • Low Flow Adaptor: Glass Reinforced Polypropylene
  • Rotor Pin: Ceramic
  • Rotor: PPS Composite

NPT Connection

  • 1” NPT Female
  • 1/2” NPT Female
  • 1/4” NPT Female
  • 3/4” NPT Female
  • 9/16”-18 NPT Female

O-Ring Material

  • Buna-N (Polypropylene Body)
  • Viton (Alloy Bodies)

Operating Pressure

  • Brass or Stainless Steel Body psig: 100 (kPa: 690, bar: 6.9) at 100° C (212° F) - Max.
  • Brass or Stainless Steel Body psig: 200 (kPa: 1,380, bar: 13.8) at 21° C (70° F)
  • Polypropylene Body psi: 40 (kPa: 280, bar: 2.8) at 82° C (180° F) - Max.
  • Polypropylene Body psig: 100 (kPa: 689.5, bar: 7) at 21° C (70° F)

Operating Temperature

  • Brass or Stainless Steel Body: -29° to 100° C (-20° to 212° F)
  • Polypropylene Body: -29° to 82° C (-20° to 180° F)

Output

  • Current Source Output: 70 mA - Max.
  • Output Signal: 4.5-24 Vdc Pulse

Pressure Range

  • bar: 2.758 to 34.47
  • kPa: 275.8 to 3,447
  • psi: 40 to 500

Viscosity

  • 200 SSU

Wetted Materials

  • 316 Stainless Steel
  • Brass
  • Polypropylene

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

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