F25 Series


  • Australian made
  • Reliable robust construction
  • Weatherproof enclosure IP56
  • All wetted parts in thermo plastic
  • No metal parts in contact with fluids
  • Fully adjustable flow sensitivity
  • Suits pipe sizes 25MM to 150MM +
  • Reed switch or solid state output
  • Totally serviceable design
  • Full 18 Bar (260 PSI) pressure rating
  • Energy authority approved


The F25-R and F25-B flow switches have been specifically developed to fill the need for a flow sensor, capable of working reliably in applications in which metal flow switches fail.

Typical areas include chemical, process, pharmaceutical, scientific and agricultural uses in which the metal components of traditional flow switches either interfere with, or are attacked by, the liquids being handled. Modern thermo plastic pipe systems are used extensively in agriculture, industry, and in commercial and domestic fluid handling. The F25 flow switch has been specifically designed to integrate into plastic piping systems, and to enhance the advantages of such systems. Total avoidance of metal components, in the fluid stream, has been achieved. In addition, an advanced frictionless sensitivity adjusting system gives total external control over the switching threshold.

More Information

3D CAD Drawing

Paddle Trimming Calculator

The paddles for our F25 Series switches come in a set length. The paddle 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.