Patent ID: 8558538

Claim:
An electromagnetic field sensor assembly, comprising: a) a ceramic sensor body; b) a wire coil wound about a distal end portion of the ceramic sensor body for producing an electromagnetic field, wherein the wire coil is formed from a platinum group metal or an alloy thereof; c) a ceramic well enclosing the ceramic sensor body and the wire coil; d) a metallic housing surrounding a periphery of the ceramic well and having an open distal end; e) a cable adapter joined to a proximal end portion of the metallic housing, wherein a pair of coaxial cable assemblies are joined to the cable adapter for connection with the coil, wherein cable lead wires are joined to center conductors of the coaxial cables for connection to opposite ends of the coil, and wherein the center conductor of each coaxial cable is formed from two different conductor materials connected in series to one another.