The principle of operation is
simple which insures extremely reliable monitoring.
A magnetic float, moves up and down along a stainless steel guide/protection tube
and tracks the
liquid level being monitored. In the process it activates or deactivates reed relays
internally fabricated in the tube.
As the float passes the reed relays they change their output state which they
retain until the float passes again in the opposite direction.
All wetted parts are made of stainless steel.
Various process connections as well as flanged versions
are available.