magnetic flaw detector

magnetic flaw detector

[mag′ned·ik ′flȯ di‚tek·tər]
(electromagnetism)
A flaw detector in which a ferrous object is magnetized with an electromagnet or permanent magnet and sprayed with magnetic particles or a solution containing fine suspended magnetic particles which outline surface or near-surface flaws.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.