Well, my trusty thermo wand (thermopen knockoff) had a flat battery as I was heating strike water. Assemble my team of misfit thermometers, to try to find consensus:
Electronic roast thermometer reads 171
Manual thermometer that I can calibrate at either freezing, or boiling, but not both reads 160
Candy thermometer reads 155
Oil thermometer that came with my turkey fryer reads 135.
I hate unreliable measuring tools.