>If this type of measurement does not work for those, >what other type can I use? I would have thought a PRT would work for all those, or a thermocouple certainly would, although for both type you would have to make sure you had high temperature insulation on the wires. Often Thermocouples come with insulation that just doesn't quite make these temperatures, and to get insulation that is suitable involves a quantum jump in cost. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist