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Electromagnetic Acoustic Transducer (EMAT) is a transducer for non-contact sound generation and reception using electromagnetic mechanisms. EMAT is an ultrasonic Non-destructive Testing (NDT) method which does not require contact or couplant, because the sound is directly generated within the material adjacent to the transducer. Due to this couplant-free feature, EMAT is particularly useful for automated inspection, and hot, cold, clean, or dry environments.
EMAT is an ideal transducer to generate Shear Horizontal (SH) bulk wave mode, Surface Wave, Lamb waves and all sorts of other guided-wave modes in metallic and/or ferromagnetic materials. As an emerging ultrasonic testing (UT) technique, EMAT can be used for thickness measurement, flaw detection, and material property characterization. Advantages are, Dry Inspection, Easier sensor deployment, Ability to generate SH modes, less sensitive to surface conditions.
EMAT is widely used in Oil & gas Industry, chemical, metal manufacturing and processing, automotive, railroad, pipeline industries (In-service piping, Tubulars, Wall thickness under pipe support, Vessels)
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