Theory of Operation-Capacitive Proximity Sensor

There are many explanation around transducer, capacitive proximity sensor, receiver, transmitter, beam sensors, capacitive proximity, and sensors are presented in this theory. The theory presents info regarding distance, maximum sensing, ultrasonic proximity sensors, capacitive sensors, ultrasonic, evaluator, and operating range.

Inside this theory you can find info such as sensing distance, output range, ultrasonic sensors, range, proximity sensor, sensing range, and capacitive proximity sensors. Below are grabbed from this theory:

The main difference between the two types is that capacitive proximity sensors produce an electrostatic field instead of an electromagnetic field. Capacitive proximity switches will sense metal as well as nonmetallic materials such as paper, glass, liquids, and cloth. The sensing surface of a capacitive sensor is formed by two concentrically shaped metal electrodes of an unwound capacitor. When an object nears the sensing surface it enters the electrostatic field of the electrodes and changes the capacitance in an oscillator circuit. As a result, the oscillator begins oscillating. The trigger circuit reads the oscillator’s amplitude and when it reaches a specific level the output state of the sensor changes.

In addition, the theory contains information things like ultrasonic proximity, sensing, the sensing range, an ultrasonic sensor, proximity, signal evaluator, and sonar sensors.

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