The working principle of the regulator is very
a float located inside the regulator casing follows
the level of the liquid to which it is connected
directly or via 3 – 4 mm diameter piping.
A permanent magnet is embedded in polyurethane
resin on the head of the regulator and another
one is put on the microswitch.
When the level drop rises the float magnet comes
into proximity with the upper wall of the regulator
and it attracts the rod of a 20 (8) A250V a.c.
microswitch with NO + NC contacts. It is the
magnetic field itself that makes the microswitch