P20 Series


  • Australian made
  • Supplied with 20mm spigots
  • No metal parts in contact with liquids
  • All position mounting
  • Detects very low flows
  • Robust reliable switch
  • Easy to install
  • High flow through
  • 18 Bar (260 PSI) Pressure rating
  • Very low head loss
  • Many options available


The P20 In line Flow Switch is a simple and reliable flow switch that can detect the flow of liquids or gases in tubes and small diameter pipes.

The P20 can detect either continuous or pulsed flows. Typical applications include monitoring flow in water treatment and irrigation systems, domestic constant pressure system control, gland cooling systems and a myriad of uses in industrial process control. The P20 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 P20 is ideal for use in aggressive liquids such as seawater, groundwater, acids and many chemical solutions. The standard switch is supplied complete with pipe spigots and unions, for direct fitting into PVC or ABS pipe work. In addition three electrical modules are available that give a wide choice of control options. Each P20 flow switch is supplied complete with 3 pistons, to provide the user with a wide choice of flow switching points.


  • Liquid or gas flow detection
  • Constant pressure pump control
  • Loss of prime pump protection
  • Water treatment control
  • Industrial process control
  • Irrigation control
  • Chemical dosing systems
  • Chilled water control
  • Vapour flow detection

AutoCAD Drawing

More Information

Reed Switch Information