TWM Trailing Wire Flow Switch

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  • Unique trailing wire sensor
  • 0 to 500V AC 15 Amp S.P.D.T switch standard 
  • Gold Contact Low Wetting Current model available 
  • High impact billet aluminium housing 
  • 316 Stainless steel process connection
  • 3/4” & 1” models available with BSP or NPT threads 
  • Suitable for harsh mining applications
  • 400 Bar 5800 psi pressure rated 
  • Manual override built in 
  • Seal-less magnetic drive 
  • Fully adjustable 
  • Easily serviceable


The TWM trailing wire flow switch is supplied with a 316 stainless steel process connection and is available in 3/4”
or 1” with BSP or NPT threads. The switch housing is machined from solid billet Aluminium. A 500V Single Pole
Double Throw (S.P.D.T) microswitch for general control circuit applications is supplied as standard with the TWM.
In addition a low voltage low wetting current model is available for signalling applications. A unique feature of the
TWM flow switch is its built in manual override. Using the manual override allows the system to be manually started
at  any time by simply pressing the button. It also makes testing and commissioning of systems very simple.
The TWM flow switch is available with wire sensors in various lengths from 50mm to 300mm (2” to 12”).
The required wire length must be specified when ordering. The flow rate required to actuate the TWM will depend
on many variables such as turbulence, liquid viscosity and the surface area of sensor wire exposed to the flow.

More Information

TWM Series Data Sheet
TWM Series Installation Sheet

3D Model View and Download

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