I've been trying to make am all-in-one brewing system which has been a success so far (at least on the software side) but I have problem with DS18B20 that I am using as the temperature probe for my project.
Recently, since I put the system together and tried an actual brew, the sensor failed halfway through the mashing step (duration 1 hour, 65 deg C). I then changed the probe for a new one and pretty much same thing happened. then I tried different sensors, those who come inside a metal sheet, also the "naked" sensor itself, bla bla bla and all seem to fail after 40 minutes inside the hot water. (and by fail I mean it shows -127C)
However, when I take the sensor out of the hot water, a few seconds later it comes back to life and works normal, it seems to me that it just cannot handle high temperatures for longer than a couple of minutes. Has anybody faced the same issue? Am I making a foooolish mistake here?!