• Eddy Current testing is the use of electromagnetic induction to detect and characterize surface and sub-surface flaws in conductive materials
• Eddy current sensors sense displacement  and are formed when a changing magnetic field intersects a conductor
• Probes sense the change and find out the distance between the probe and the test material
• Electric current is induced into the test subject and the change in the current is noticed and determines a fault. There will be a corresponding change in the phase and amplitude of the signal that is measured.
• Eddy Current  can measure metal thickness so erosion or metal thinning can be detected
• Eddy current is one of six methods of NDT testing: eddy current, magnetic-particle, liquid penetrant, radiographic, ultrasonic, visual testing

• Faster scanning speed than ultrasonic testing
• Minimal preparation for surfaces to be tested
• EC can test through several millimeters of coating
• Very sensitive - can detect very small cracks
• Testing devices are portable with immediate results/feedback
• The test equipment does not need to be in direct contact with the item being tested
• Production is not interrupted due to fast and automated testing
• Groups of sensors can be used to provide a larger area scan

• Aerospace Industry
• Petrochemical Industry
• Material sorting- used to determine that the proper materials are being used for a job
• Used to determine material characteristics/purity of the metal
• Tube and wire testing
• Weld testing
• Coating thickness measurement

Mentor EM Brochure

EDDY CURRENT PROBES