EX Series Inductive Displacement Sensor Measurement Principle

This document explains the measurement principle of inductive (eddy current) displacement sensors, which use a high-frequency magnetic field to detect distance changes via impedance variations in the sensor coil. It also compares inductive sensors to other types (optical, ultrasonic, laser focus, contact) and details two detection methods: oscillation amplitude and oscillation amplitude plus phase shift, as used in KEYENCE’s EX Series.