I have a display in my car that registers outside temperature. It seems to be accurate even in the most adverse circumstances, such as when parked in a parking lot in the sun for a long time. I feel the temperature standing there well over the hundreds, yet the temp gauge does not seem to be fooled by this. I would think that thermal conduction and radiation of heat in the vicinity of any probe (such as the heat built up inside my car, which apparently can go over 150 degrees, or the heat rising off the pavement all around my car) would make the probe's temperature reading skyrocket. How are they designed so that they give accurate readings?