Having no physical contact, a proximity type sensor is a highly sophisticated machine designed to either signal if an object is there or not at all. It has two main features: it can detect how far away the sensor is from its target object and thus set off outputs accordingly. Technological features of the proximity sensor vary in complexity from type to type. Typically they include elements such as capacitive, inductive, photoelectric and ultrasonic methods. These sensors are widely adaptable and can be relied upon to give exactly the same result in completely different environments. The applications of the proximity type sensor span multiple fields. From manufacturing and automation to logistics and security systems, they contribute mightily to your life. They are used for detecting the position of parts, counting, and as protective devices which stop collisions with machinery.