being a limited power device, will lower its
amplitude as the eddy currents are produced. The convertor/
trigger circuit rectifies the AC sine wave signal to DC,
compares the level against a preset reference, and actuates
the sensor output if a target is present. Switching is clean,
with none of the bounce of mechanical switches
Proximity sensors are generally constructed with four main
elements: (1) a coil and ferrite core assembly; (2) an oscillator;
(3) a convertor/trigger circuit (detector) and; (4) an
output device.