Alternators + Arduinos
I need some suggestions for a device to act as a small homebrew temperature probe that can measure (and withstand) between 100 and maybe 170 degrees Celsius.
I'm about to install an alternator in my Sprinter, and am aware that the current rating (in this case, 150A) is not fixed, but is dependent on things like ambient air temperature and altitude.
So I'd like to instrument my new alternator with temperature and current probes to better understand its operating profile, and eventually automatically add and remove loads and issue warnings. For current probes I will probably use hall effect devices scavenged from optical drives.
But I need tips on something to use for a temperature probe. I need something tiny that can fit between gaps in the windings, can withstand high temperatures, and provide a resolution of better than, say, five degrees when wired into a circuit that drives an Arduino input. Any suggestions?
(A paper about alternator temperature considerations: http://www.rockymountainpower.com/pdfs/Tech%20Paper%20Alternator%20Rise%200166970SBY.pdf