Eddy current probe assembly

An eddy current probe assembly comprising:

• an eddy current probe extending along a center axis between and to a probe end and a distal end, the eddy current probe includes a first drive coil, a second drive coil, a first differential sense coil, and a second differential sense coil, and each of the first drive coil, the second drive coil, the first differential sense coil, and the second differential sense coil is disposed at the probe end and the center axis;
• and
• a controller including a processor in communication with a non-transitory memory storing instructions, which instructions when executed by the processor, cause the processor to:
• direct a first electrical current flow through the first drive coil and a second electrical current flow through the second drive coil;
• and
• measure a first output voltage of the first differential sense coil and a second output voltage of the second differential sense coil;
• wherein the eddy current probe further includes a first spacer body and a second spacer body, the first spacer body extends from the first differential sense coil to the distal end, and the second spacer body extends from the second differential sense coil to the distal end;
• and
• wherein the first spacer body and the second spacer body are formed, wholly or in substantial part, by a non-conductive material.

An eddy current probe assembly comprising:

• an eddy current probe extending along a center axis between and to a probe end and a distal end, the eddy current probe has a probe outer diameter side extending circumferentially about the center axis, the probe outer diameter side extends between and to the probe end and the distal end, the eddy current probe includes a first drive coil, a second drive coil, a first differential sense coil, and a second differential sense coil, each of the first drive coil, the second drive coil, the first differential sense coil, and the second differential sense coil includes a first side, a second side, and a coil outer diameter side, the first side intersects the second side at the center axis, and the coil outer diameter side forms the probe outer diameter side,
• wherein the eddy current probe further includes a first spacer body and a second spacer body, the first spacer body extends from the first differential sense coil to the distal end, and the second spacer body extends from the second differential sense coil to the distal end;
• and
• wherein the first spacer body and the second spacer body are formed, wholly or in substantial part, by a non-conductive material.