The displayed temperature is the temperature of right on the pan; that is, of the sample especially when spread on the pan evenly. However, when the sample is placed unevenly or has a hard skin membrane the temperature is of the surface of the sample.
MS/MX/MF/ML does not have a sensor right on the pan but calculates the place where the temperature is assumed to be the one of that on the pan, and puts the sensor there. Temperature calibration is possible by users.