This paper describes a new hand-held 7-channel fully parallel impedance instrument that can support a wide range of eddy current sensors. Applications include 7-channel flexible MWM®-Array sensors for rapid imaging of corrosion or first and second layer cracks in lap-joints, and segmented field eddy current sensors for characterization of coatings in turbines or structures. MWM-Arrays enable multiple frequency model-based characterization of lap-joints, discriminating between first and second layer corrosion, and discrimination between inconsequential gaps between layers and actual material loss. Linear drive MWM-Arrays also support composite impact damage imaging and fiber orientation characterization. Segmented field eddy current sensors enable enhanced characterization of multiple layered coatings [1-5]. The hand-held system is complementary to larger 19- and 39-channel versions (expandable to 119 fully parallel channels) that can provide both wide area rapid scanning with inductive sensing element MWM-Arrays and very low frequency operation with magnetoresistive sensors (e.g., MR-MWM-Arrays) for imaging of buried corrosion in thicker structures. This presentation will describe the recent advances in the hand-held instrumentation and MWM-Array technologies for a range of applications.
 Goldfine, N., Zilberstein, V., Schlicker, D., Grundy, D., Shay, I., Lyons, R., Lovett, T., LaCivita, K.,
“Enhancements in MWM -Array Hidden Corrosion Imaging,” Tri-Service Corrosion Conference, Las Vegas,
Nevada, November 17-21, 2003.
 ASTM E2338-11 Standard Practice for Characterization of Coatings Using Conformable Eddy-Current Sensors
without Coating Reference Standards, ASTM International, Book of Standards, Vol. 03.03.
 ASTM E2884-13 Standard Guide for Eddy Current Testing of Electrically Conducting Materials Using
Conformable Sensor Arrays, ASTM International, Book of Standards, Vol. 03.03.
 Goldfine, N., Grundy, D., Windoloski, M., Chaplan, S., Sheiretov, Y., Thomas, Z., “Reliable Detection of Small
Cracks Induced During Service for Fatigue Critical Components,” Airworthiness Conference (AA&S), Grapevine,
Texas, March 21-24, 2016.
 Goldfine, N., Sheiretov, Y., Denenberg, S., Dunford, T., Washabaugh, A., Thomas, Z., JENTEK Sensors, Inc.
Technical Document Number TR_2016_05_13_Handheld titled “ Hand-Held, Wireless (or Ethernet) Eddy Current
Array System for Rapid Inspection” dated May 13, 2016.
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