I have an actual lab grade MERCURY thermometer. Column is actually silver. Thermometers with red or blue fluid are alcohol. Not that it makes much difference, all can be calibrated accurately if the manufacturer wants to go to the trouble. Now to your question... I have a couple digital thermometers that track quite well with the lab thermometer... One, a Taylor is very close. My GM cars have a digital that tracks well too. Really like that the digital stores max/m in temps. If I can remember to reset it, that is.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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