Thanks Wana and Terry. Am off to good start with info provided. Will switch from thermistors to water proof DS18B20. An interesting idea to add more temp data. I looked into 20x4 LCD which could present 8 temp points (2 per line)... BUT... am not sure single Ardunio can handle that---seems number of pin ports limits number of temp sensors. OR, is it possible to continuously rotate (loop) sensor selection?---so that theoretically, any number of sensors can be used.