> When the water is NOT touching the probe, the resistor heats the > thermistor to a steady-state point, above normal ambient. > Comments welcome. Bob, that method sounds OK, but would definitely need more set-up time spent on it. Unless you're after developing it for another application that deserves the complexity, is it worth the time ? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist