A sensor device includes a flexible planar strip (40) including a plurality of layers. The strip is configured to at least partially encapsulate a medical device. The strip includes a first dielectric layer (10), a conductive shield layer (12) disposed on the first dielectric layer, a second dielectric layer (14) formed on the conductive shield layer; and a patterned conductive layer including a sensor electrode (26), a hub electrode (28) and a trace (18) connecting the sensor electrode and the hub electrode.