Picture of a flow switch DW-N by Henke Sass Wolf in the field flow measuring technology of industry products.

Flowswitch DW-N

Reliable monitoring! Easy to use!

Flowswitch with adjustable switching point and optical switching dis­play using glow lamp. The DW-­N is based on the extremely reliable way deflection system. The pendulum system with the pressure plate (deflector) is moved by the flowing medium against the strength of a spring. 


Flowswitch DW-N

A metal bellow seals the system from the medium to the measuring and display part. The movement transmission is done by force. A micro-­switch arranged in the measuring part and a control lamp are activated. Corresponding switching processes are triggered by this micro­-switch. 

If the T­-part of the DW­-N device types is affected by calcification, de­bris or dirt, there is a message ‘no through­flow’. This means that it is virtually impossible for the system to stop in a position in which flow is indicated but where there is none.

  • simple adjustment of the switching points in accordance with small scale
  • compulsory movement transmission to the micro­-switch
  • hermetic separation of the medium from the micro-­switch using the bellows
  • insensitive to pollution and magnet fields
  • high electrical resilience
  • maximum operating reliability and serviceability
  • can be supplied for all flow directions and installation positions
  • also available in Ex-version
  • Version with two switches is available


Here you'll find an overview of our product range as a PDF