Inductive Sensors

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.