MF20 Series


  • Australian made
  • Detects flows of less than 350ml/hour
  • Suits tubes and pipes 6mm to 20mm (1/4″ to3/4″) dia.
  • No metal parts in contact with liquids
  • Suits pulsed or continuous flows
  • 18 Bar (260 PSI) Pressure rating
  • Stable electrical response
  • Very high flow through
  • Low head loss design
  • Easy to install


The MF20 MicroFlow Switch is a super sensitive version of our popular P20 Inline Flow Switch. The MF20 is a very simple and reliable mechanical flow switch that can detect extremely low flows. The switch can detect either continuous or pulsed flows.

The MF20 flow switch gives a simple on or off response to liquid flow. There are no metal parts in contact with liquids within the switch, so the MF20 is ideal for use in aggressive media such as acids and alkali’s and many chemical solutions. The switches are supplied with tube flare fittings, and a set of pipe spigots and unions for direct fitting into 15NB PVC or ABS pipe work.

Please see the linked a data sheet for information on the 3 different models available in the MF20 Series.


  • Control for backup dosing pumps
  • Chemical metering pump control
  • Chemical injection point control
  • Vapour and gas flow detection
  • Laboratory applications
  • Loss of prime detection
  • Batch control

More Information

AutoCAD Drawing

Reed Switch Information