Inductive sensors
detect metal objects presence in the sensible area.
They aren’t influenced by non-metal materials.
WORKING
PRINCIPLE
An oscillating
electromagnetic field is generated in the sensible area.
When a metal object enters the sensitivity field, it tends
to decrease the amplitude of oscillation, creating in
this way a switching in the output stage.
In
inductive sensors range there are version with linear
output in current or in tension.
Turned into a signal proportional to
the damping of the oscillator, which depends by the
distance and metallic composition of the detected object.