F Series


  • Australian Made
  • 0 to 500V AC 15 Amp S.P.D.T switch
  • Low Voltage Gold contact model also available
  • 316 Stainless or Polypropylene models
  • 3/4” & 1” models available with BSP or NPT threads
  • Comes with built in Manual Overide
  • Sleek modular construction
  • High pressure 400 Bar 5800 psi models available Seal-less magnetic drive
  • Weatherproof IP67 housing
  • Easily serviceable


The F Series flow switch is a tough but highly sensitive paddle flow switch suitable for a wide range of flow control applications in both hot and cold liquids. 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-L models are the low voltage options specifically designed for use in Ex applications and with low wetting currents.

Please see data sheet linked below for ordering information and electrical specifications.

More Information

Please note that we are currently experiencing extended delays in the manufacture of the 'L'  type microswitch models in the F Series. As an alternative, check out the specs for the F25-B here. Contact us for more details. 

Paddle Trimming Calculator

The paddles for our F Series switches come in set lengths. These paddles can be cut down to suit your pipework and flow rate. We recommend using our Paddle Trimming Calculator to find the correct paddle length for your application.