I would seriously look at using the AD590 temp sensor from Analog Dev= ices. Use the ceramic package version, which is about 1mm thick, 3mm wide, = and about 12mm long (dimensions from memory, not data sheet). This should= be easily stuck to, or imbedded in whatever you are wishing to monitor. = It has very low mass, so tracks changes rapidly. Thanks Alan These look pretty good. I need the accurate range from 40=B0 - 100= =B0C and need to have the probes be pretty neutral to the foam structure. = I have this nagging little voice warning me off about using a wire type prob= e so this seems to fit the bill. Thanks for the heads up. Dave -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics