White Paper: Sensors/Data Acquisition

Tips for Reducing Error When Using Eddy Current Measuring Techniques


Inductive eddy current technology is an extremely versatile non-contact method for measuring an object’s position, distance, or vibration. Unaffected by environmental contaminants or target finish characteristics, these sensors can operate in a vacuum or in fluids, so they work well for dirty applications like those with oil or dust present.

This white paper discusses tips for reducing errors so you can get the most out of your eddy current sensors. To really learn how to achieve the best outcome, you have to understand eddy current measurement basics and sources of error within eddy current technology. Care must be taken to avoid common error sources associated with eddy current sensors. If not, users may not get a good measurement or may get more error than can be tolerated for the application.

Additional tips for reducing errors include: details on how to select the right circuit, adjusting for the presence of another metallic object close to target, considerations for temperature and environmental conditions, avoiding multiple sensors, mounting fixture details, and more.

Kaman is the world leader in the design and manufacture of high-performance position measurement systems. With over 40 years of experience, Kaman’s advanced family of high-precision eddy current sensors are used in hundreds of applications within aerospace, automotive, energy, metals production, metalworking industries, and many others.

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