Inductive sensors

Inductive proximity sensors are indispensable in industry today. They use an alternating magnetic field produced by an oscillator as their measuring medium. If a metallic object enters this magnetic field, the oscillation amplitude changes. This is analysed electrically. In contrast to optical or ultrasonic sensors, they are however only for use in close-up range. Typical operating distances vary between 0.5 mm and 40 mm.