Non-Tubular capacitive proximity sensors are electronic devices capable of detecting the presence or approach of organic liquids, plastics, powders, woods, papers, metals etc. The housings have square or rectangular shape depending on the sensor line.

It relies on the principle of operation of a capacitor. When a material approaches the sensor face, i.e. the electric field, the dielectric of the medium changes, also changing the capacitor, dielectric. As the sensor oscillator is controlled by the frontal capacitor, when approaching a material, the capacitance also changes, causing a change in the oscillator circuit. This change is converted into a continuous signal, which compared to a standard value, starts operating the output stage.

These are the models called Pentakon or Unikon. They have square or rectangular housings of resistant plastic with connection by cable, connector or screw terminals. Supply for continuous or alternating voltages.

They are used where there is the need of detection of any type of object.

The detection occurs without physical contact between the actuator and the sensor, with no wear of mechanical parts, thereby reducing the need for maintenance and machine down time.