The present invention relates to a sensing device for in-situ health monitoring of critical engineering components exposed to high temperature and stress. The system  includes a high-temperature sustainable electromagnetic sensor that works on the principle of eddy current (EC), in which electromagnetic induction at a metallic  component under inspection causes impedance variations due to damage. In-situ sensor, sensing device, and embedded software are its main components. It can  perform real-time EC inspection in multiple modes of eddy current testing with the sensor fixed to the target component operating at 600 ⁰C or higher. The embedded  software performs multiple EC inspections and post-processing of acquired EC signals to generate damage signatures.