F Series Paddle Flow Switch


  • Australian Made
  • 0 to 500V AC 15 Amp S.P.D.T switch (‘H’ models)
  • NEW! – Low Voltage option also available (‘RL’ models)
  • 316 Stainless or Polypropylene models
  • 3/4” & 1” models available with BSP or NPT threads
  • Built in Manual Override (‘H’ models only)
  • Sleek modular construction
  • High pressure 400 Bar 5800 psi models available
  • Seal-less magnetic drive
  • Weatherproof IP67 housing
  • Easily serviceable


The F Series flow switches are tough, but highly sensitive paddle flow switch suitable for a wide range of flow control applications in both hot and cold liquids and a variety of chemicals. The electrical housing of the switch is a separate assembly and locks onto the wet end of the switch. It can be easily and safely removed for servicing, without disturbing electrical wiring. This unique feature, and the inclusion of a built in manual override make the F Series a very versatile flow switch.

The ‘F-H’ models are the standard models in the F Series. The ‘F-RL’ models are the low voltage options specifically designed for use in Ex  hazardous applications and with low wetting currents.

See the data sheet linked below for more information on the available models in the F Series and the ordering codes.

More Information

Paddle Trimming Calculator

The paddles for our F Series switches are supplied at a set length. These paddles can be cut down to suit your pipework and flow rate. We recommend using our Paddle Trimming Calculator (linked above) to find the correct paddle length for your application.


For assistance in choosing the correct product for your needs, check out our Product Selection Guide. 

3D Model & Download