Our tried-and-tested flow monitoring switches are used for two basic purposes:
- To ensure a minimum flow rate, e.g. of cooling water or lubricating oil (protects against running dry).
- To start a technical procedure when the flow begins.
Function
The flow monitoring professional switch comprises a paddle system to whose end a permanent magnetic is attached. Above this magnet is a reed contact, located outside the flow of fluid. A second magnet with opposing poles creates the force necessary to reset the switch back to the no flow position.
When the flow being monitored pushes against the paddle system, the paddle swings away. This changes the position of the magnet in relation to the reed contact and thus activates the contact.
As soon as the flow is interrupted, the paddle moves back to its starting position, thus activating the reed contact once again. The force necessary to push the magnet back is provided by the two industrial magnets repelling each other.
Using magnetic force instead of the usual leaf spring means that the switch is considerably more stable in the long term and much less sensitive to pressure peaks.
