Embedded thin film temperature sensor onto the surface of lubricated mechanical component shows promising for real-time machine condition monitoring because the sensor could provide a minimally intrusive way of measuring temperature distribution in a lubricated contact in order 1) to early detect sudden changes in the lubrication condition that could have led to catastrophic failure for machinery; 2) to identify the early onset of incipient failures so that predictions can be made about their most likely progress and suitable actions can be planned, 3) to provide experimental verification of computational models that simulate extreme variations of temperature and pressure in a elastohydrodynamic lubrication film, and 4) to evaluate advanced materials for use in highly loaded tribological system [1]. Therefore, embedded thin film temperature sensors are becoming the system of choice for the industry to achieve higher machine reliability and, in turn, to be cost competitive in the market.

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