Corr Science

Float Switches

    Measuring principle


Float switches are used for simple limit value detection in liquids. Due to the higher density of the liquid, the float switch floats on the liquid surface. The float switch is secured by means of its cable fastener at a level suitable for the given application. The switching process is triggered by the rocking movements of the sensor. Initiators and micro-switches are used as switching elements.

Operation mode


The float switch consists of a float body with a built-in switching element and a connection cable. The switching element switches when it crosses the horizontal position in either direction. The following mercury-free switching elements are available: 

• Initiators
• Small operation balls with inductive position detection
• Micro-switches with operation ball

Mercury-change-over contacts are available.