This is a float operated level switch having a single float for
high or low operation enclosed inside the cage having side-side
connections to process tank. Here the float which carries the
magnet moves up and down sensing the level increase or
decrease inside the external chamber. These switches are externally
fitted i.e. they are clamped outside the chamber pipe.
These switches are latching type and they are either reed
or micro type. Once the float moves up due to level rise while
exceeding the actuation points the float magnet actuates the switch i.e. (nc to no). It remains as no contact because of the
latching arrangement inside the switch though the level continues to rise to the maximum. When the level drops lower than the
set point the contact changes though the level goes down even to its lowest position such as even to zero position.