☑ Inductive Sensor How It Works

An inductive sensor is a device that uses the principle of electromagnetic induction to detect or measure objects. In this article we explain the various types of inductive position sensor.

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Inductive proximity sensors are used for non contact detection of metallic objects.

Inductive sensor how it works. This was first observed by michael faraday in the 1830s when he found that a first current carrying conductor could induce a current to flow in a second conductor. Their operating principles and their relative merits. All inductive sensors can be said to work on transformer principles and they all use a physical phenomenon based on alternating electrical currents.

How inductive sensors work. An inductor develops a magnetic field when a current flows through it. Their operating principle is based on a coil and oscillator that creates an electromagnetic field in the close surroundings of the sensing surface.

The terminology and techniques used in inductive position sensing can be confusing. Inductive proximity sensors are used for non contact detection of metallic objects. 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.

The inductive sensor uses a coil an inductor to generate a high frequency magnetic field as shown in figure 1 below. The presence of a metallic object actuator. The presence of a metallic object actuator.

Their operating principle is based on a coil and oscillator that creates an electromagnetic field in the close surroundings of the sensing surface. If there is a metal object near the changing magnetic field current will flow in the object. Inductive sensors are often used to measure position or speed especially in harsh environments.

Alternatively a current will flow through a circuit containing an inductor when the magnetic field through it changes. Inductive sensors use currents induced by magnetic fields to detect nearby metal objects.