Flow switch with pipe piece / metal version

SIKA flow switches are used to monitor the volume flow and are available in various nominal sizes and switching point ranges depending on the requirements. Due to the modular design principle, the product variants and options can be adapted for a wide range of applications. A wide range of temperature and pressure ranges, material selection and diverse connection options offer great flexibility, allowing SIKA flow switches to be used in many areas, including heating technology, industrial cooling circuits, water treatment and drinking water applications.

The flow switch consists of a paddle system which carries a permanent magnet at the upper end. A reed contact is located above the magnet outside the flow. A second magnet generates a restoring force for the paddle. When the flow to be monitored hits the paddle system, it is deflected. This causes the magnet to change its position relative to the reed contact, which is thus actuated. As soon as the flow is interrupted, the paddle moves back to its initial position and thus actuates the reed contact again. The restoring force required for this is generated by the two repulsing magnets.

The use of magnetic force instead of a conventional leaf spring results in significantly higher long-term stability and much greater insensitivity to pressure peaks.