Inductive & Capacitive Proximity Sensor as Object Detector 

A proximity sensor detects an object when the object approaches within the detection boundary of the sensor. Proximity sensors are used in various facets of manufacturing for detecting the approach of metal objects.
Various types of proximity sensors are used for detecting the presence or absence of an object. The design of a proximity sensor can be based on a number of principles of operation, some examples include variable reluctance, eddy current loss, saturated core, and Hall Effect. Depending on the principle of operation, each type of sensor will have different performance levels for sensing different types of objects.
Common types of non-contact proximity sensors include inductive proximity sensors, capacitive proximity sensors, ultrasonic proximity sensors, and photoelectric sensors. Hall-effect sensors detect a change in polarity of a magnetic field.
In this video, we have explained about working principle of Inductive & Capacitive Proximity Sensor with Video Demonstration. An object detection circuit using inductive and capacitive proximity sensor is also given
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