Hello, I am looking for information on the actual sensing region of this probe: LM34AH silicon based temperature sensor. Is the temperature averaged over the entire 5mm diameter top surface? Or is there a smaller sensing region within the surface? I am trying to measure the temperature within a 2mm channel by holding the sensor to the surface of the glass slide. I am concerned that overhang of the sensor on either side of the channel will cause an inaccurate representation of the temperature within that 2mm range.