RotorFlow RFS series, Gems GM-156265/155485


Highly accurate & repeatable flow switches. Combines visual confirmation of flow with dynamic, electronic switch operation. Easy, adjustable switch point calibration: a local LED signals when set point is reached

  • GM-155485: PP, ½” NPT, 4.0 – 20.0 GPM, 24VDC
  • GM-156265: Brass, ¼” NPT,  0.5 – 5.0 GPM, 24VDC

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SKU: GM-155485 Category:


Flow set point switching – RFS Types

 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.
  • Ranges:  15 L/min to 75 L/min (1/2″ PP)  2 L/min to 19 L/min (1/4″ brass)
  • Brass or Polypropylene, SS bodies  (optional)
  • 24VDC supply
  • Accuracy of factory setpoint ±5%
  • Repeatability of action 2%
  • Pressures to 13.8 bar and temperatures to 100°C depending in body material
  • Output relay 1 amp 24VDC resistive
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

Downloads:   Data sheet       User manual

Additional information


GM-155485, GM-156265