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Everything Eddy Current


Knowledge Resource

In this area, we hope to provide some useful and educational material that covers the topics of NDT as well as Eddy Currents and Eddy Current NDT.

The Knowledge Resource area also carries some links for further education, training and useful resources for further reading. If you have any questions or application issues that you think the ETher team could help you with, please do not hesitate to contact us.

NDT Knowledge

Here we offer some insight into the world of eddy current NDT. First to understand where eddy current NDT fits into the world of NDT there is:

Getting to Grips with NDT (515.3KB)

Quick Guide to Eddy Current (287.3KB)

For more information on NDT please refer to our Introduction to Conductivity section.

Eddy Current Knowledge

For a more comprehensive understanding of Eddy Current NDT we are pleased to include here the 4 part series on Back to Basics Eddy Current.

Published in the BINDT Journal Insight in 2004 and compiled by John Hansen whilst working for Hocking NDT this series offers a in-depth insight into Eddy Currents. Please see list acknowledgements at the end of part 4 for details of other contributors.

The series covers:

Part 1. History and Electrical Theory
Part 2. The Impedance Plane and Probes
Part 3. Instrumentation and Applications
Part 4. Applications, Practical Testing and Advanced Concepts

If you would like a copy of the series please use our contact form to get in touch.

Eddy Current Formulae

Download A2 Wall Chart (1MB)

If you would like a hard copy of our Formulae wall chart please email

Eddy Current Training Courses

If you want to find out more information about training courses in NDT or eddy current then visit the following website:

BINDT - British Institute of NDT.
ASNT - American Society of NDT

A comprehensive list of NDT Societies across the globe can be found via the BNDT website, with further contact information for a specific country.

Iowa State University hosts a huge online resource of technical information at their NDT Resource Center

You will find below further pages with links to relevant Articles and Papers, Conductivity information and a selection of our Application Notes, which are also referenced through out the site.