Indirectly Excited Eddy Current Sensor

Publication Type:

Journal Articles


Experimental Techniques, wiley, Volume 38, Number 5, p.70–74 (2014)



Eddy Current, Position Sensor and Liquid Sodium Environment


Conventional directly excited eddy current sensor (DECS) cannot be used where direct electrical connectivity is a constraint such as in liquid sodium environments. Utilizing an inductive coupling, an indirectly excited eddy current sensor (IECS) is designed to circumvent this problem. The response of IECS for targets of different electrical conductivities and fill-factors, and positioning accuracy are compared with the performance of an equivalent DECS. The response of IECS to that of DECS is about 70%.


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