# What is eddy current sensor technology and its applications? **URL:** \ **Category:** Industrial Automation\ **Tags:** interviewquestions, instrumentation\ **Created:** [September 17, 2018, 1:50pm UTC](https://forumautomation.com/t/what-is-eddy-current-sensor-technology-and-its-applications/4668 "2018-09-17T13:50:29Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![rajeena](https://forumautomation.com/letter_avatar_proxy/v4/letter/r/4af34b/32.png) [@rajeena](https://forumautomation.com/u/rajeena)\ **Post date:** [September 17, 2018, 1:50pm UTC](https://forumautomation.com/t/what-is-eddy-current-sensor-technology-and-its-applications/4668/1 "2018-09-17T13:50:29Z")
# What is an eddy current sensor technology and its applications? ## How is eddy current formed? The eddy current sensors are used to measure displacement to a nanometer. The eddy current technology uses non-contact displacement sensors to measure positional changes in a conductive target with high precision and high resolution. ![image](https://cdn.forumautomation.com/original/2X/e/e5276a4ed36dd4d424e50ccbb9bb8a28d57b726d.jpg) These sensors generate electromagnetic fields by running in an alternating current through the sensing coil of a probe. The result is an alternating electromagnetic field induces s small current in the conductive target material called **eddy currents.** ![image](https://cdn.forumautomation.com/original/2X/6/6ca58119841b66277171dd4a5561dc6c0db6f933.jpg) As the distance between the sensor and the target changes so too changes the interaction between the probe an eddy current magnetic field. Asproceedsceed this change, the sensors produces a voltage output proportional to the distance betweeen the sensor and target very p[recisely and with high resolution. ## Applications are:- • displacement • vibration • dimensioning • alignment • sorting in the military, aerospace • semiconductor and energy industries.