this new unit tracks closely to the oven at whatever temp is set. the vc defiant encore says to test temp at the middle of the griddle, with overfiring being over 750 degrees. i'm totally amazed. when the raytek is about this temp the conventional therm reads only about 450!! over and over i have been checking and rechecking comparisons at the griddle, the corners and nearby ambient surfaces. i don't see why anyone would waste any money on various magnetic 'thermometers', much less rely on them for temps to switch to catalytic, etc.