Patent ID: 8678644

Claim:
A hot gas path measurement apparatus, comprising: a substrate having a coating applied on a substrate surface thereof such that the coating is interposed between the substrate and a hot gas path; and a measurement device fixed in a recess formed in the substrate, the recess being formed such that portions of the substrate surface outside the recess are disposed at a first plane and portions of the substrate surface in the recess are disposed at a second plane and are recessed from the first plane, the measurement device including: a sensor, and a holder configured to position the sensor in an alignment condition with a plane of a surface of the coating or at least partially within a span of the hot gas path, the holder comprising: an insulator having an insulator recess formed therein to extend from the second plane to at least the plane of the surface of the coating; and a holding agent disposed to secure the sensor in the insulator recess in the alignment condition.