This study demonstrates the determination of local Nusselt numbers by means of fast-response ALTP sensors. The new methodology is based on the simultaneous measurement of heat flux and wall temperature within one single ALTP sensor element. In addition, the adiabatic wall temperature is determined by variation of wall/sensor temperature. For this, an ALTP sensor is placed in the stagnation point region of a subsonic jet impinging on a baffle plate. The performance of the procedure is shown by step-wise heating of the plate in a range between 55 and \(90\,^\circ \) C. The resulting individual Nusselt numbers at various wall temperatures are fairly independent of wall temperature and deliver a mean value \(Nu \approx 167\) with a standard deviation of \(3.1\,\%\) . Furthermore, the characteristic of the sensor is investigated with regard to sensitivity and dynamic performance. An automated laser-based, dynamic calibration set-up with an extended frequency range up to \(2\,\textrm{MHz}\) and improved signal-to-noise ratio is presented.