is there three leads or two leads in the connecting cable? If the connector (if there is one) has three terminals then if may be a LM35Z or equivalent. I am current using this in a design of my own. I gives a direct readout of temp mV. for example 63.2 is read as 63.2 mV. It takes a ground, power ( 6 0 - 30VDC) and the third lead is the output..There are two versions. one for Celcius and the other for Faren. If there are two leads, it could be a thermistor as mentioned before. It may also be nothing more than two leads of BiMetal twisted together such as used in commercial probes Eddie -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.