I do as Jamie does basically. I have it monitoring the flexwatt at the midpoint in my 3 shelf incubator. By using two Accurites I've assured myself that there's little to no difference occurring between the top and bottom shelves and that the setting I have for the flexwatt is keeping the incubator where it should be.

Not that I have anything in there at the moment. Nuthin' sadder than an empty bator.