Starting at $73.00
  • Usually ships in 2-3 weeks



  • Bright Visual Flow Confirmation
  • Flow Ranges From 0.1 GPM to 60.0 GPM
  • Removable Lens for Quick Cleanout
  • Available in Brass, Stainless Steel or High Performance Plastic Housings
  • Operating Pressure
    • Brass or Stainless Steel Body: 200 PSIG @ 70°F
    • Polypropylene Body: 100 PSIG at 70°F (21°C)
  • Operating Temperature:
    • Brass or Stainless Steel Body: -20 to 212°F
    • Polypropylene Body: -20 to 180°F


The Gems RFI series indicates flow in the 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. The RFI series is easy to see, easy to install and easy to afford

The RFI series has port sizes from 1/4" to 1" NPTF for liquid flow rates from 0.10 to 60 GPM. Featuring rugged brass, stainless steel or polypropylene construction, the RFO utilizes a simple and reliable design suitable for operating temperatures to 212°F and line pressures to 200 psig.

Applications for the Gems RFI Series flow switch:

  • Visual Flow Confirmation on Heat Exchangers
  • Plastic Injection Molding Equipment


This product can be used in the following applications: