INDUCTIVE SENSOR
An inductive proximity sensor belongs to the category of non-contact electronic proximity sensor. It is used for positioning and detection of metal objects.
CAPACITIVE SENSOR
Noncontact capacitive sensors work by measuring changes in an electrical property called capacitance. Capacitance describes how two conductive objects with a space between them respond to a voltage difference applied to them.
MAGNETIC SENSOR
Magnetic proximity sensors in metric (MM) and rectangular (MQ) configurations. Magnetic proximity sensors provide long sensing ranges that can reliably detect magnetic objects, with entirely new application options opened up due to the smaller magnets.