Magnetic tagging
Berkowitz, A.; Lahut, J.; Meiklejohn, W.; Van Buren, C.
Magnetics, IEEE Transactions on
Volume 11, Issue 5, Sep 1975 Page(s): 1576 - 1581
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Summary: The technique of magnetic tagging using materials with different Curie temperatures was initially applied to the identification of oil spills. Continued development has demonstrated the feasibility of magnetic tagging of a very wide range of solids and liquids. This versatile technique offers the benefits of economy, sensitivity, stability, large vocabulary, easy recovery, and no environmental hazards. In addition, the detection system is simple, inexpensive and portable.
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