Is this available? A sensor that sits on the stove that registers elapsed time and temperature. I'm thinking of a unit that could then be plugged into the computer to then plot a graph of time and temperature so that you would know exactly how your stove is running thru-out the day or night when you might be sleeping or away from home. Something like what the insurance companies are providing to measure your driving performance. My son is a high tech computer expert and I am thinking this could be developed pretty easily. Would there be a demand for this?