Inductive Proximity Switch How It Works

Proximity switches are most commonly used in manufacturing equipment robotics and security systems.

Inductive proximity switch how it works. To classify them here are its types. Inductive proximity sensor proximity switch an inductive proximity sensor is a non contact electronic proximity sensor. The high frequency oscillation type using electromagnetic induction the magnetic type using a magnet and the capacitance type using the change in. There are several types of proximity sensor which are used according to the need material detection and many other things.

Inductive proximity sensors device which generates output signal or electrical signal when metal objects are either inside or entering into its sensing area. These work by sending out beams of invisible infrared light. A photodetector on the proximity switch detects any reflections of this light. This signal inductively couples into target with a resonant lc circuit.

Magnetic proximity sensors are used for non contact position detection beyond the normal limits of inductive sensors. In conjunction with a separate damping magnet magnetic sensors offer very long sensing ranges from a small package size and can detect magnets through walls of non ferrous metal stainless. Types of proximity sensors. Infrared acoustic capacitive and inductive.

Inductive proximity sensors are roughly classified into the following three types according to the operating principle. Ferrous metals such as iron and steel allow for a longer sensing range. How do magnetic proximity sensors work. The presence of a metallic object actuator in the operating area causes a dampening of the oscillation amplitude.

Inductive position and speed sensors come in a wide variety of shapes sizes and designs. There are 4 basic types of proximity switches. At the heart of an inductive proximity sensor prox sensor or prox sensor for short is an electronic oscillator consisting of an inductive coil made of numerous turns of very fine copper wire a capacitor for storing electrical charge and an energy source to provide electrical excitation. A inductive proximity sensor can detect metal targets approaching the sensor without physical contact with the target.

All inductive sensors can be said to work on transformer principles and they all use a physical phenomenon based on alternating electrical currents. The sensing range of an inductive switch is dependent on the type of metal being detected. Inductive proximity sensors are used for non contact detection of metallic objects. However to many engineers inductive sensor terminology and techniques can be confusing.

The absolute inductive encoder or inductive sensor is based on the same electromagnetic induction principle as the resolver but uses pcb traces rather than coil windings the tx track on the stator is excited by specific frequency in the range 1 10mhz.