I've been relying on an analog thermometer that I picked up from the brew store around two years ago, and right now it's measuring 120˚f while my new electronic (Fisher Sci Digital
) thermometer reads 112.5. After stepping up to AG, I was getting around 65% efficiencies consistently (3 batches).
That was probably the time that I decided to order a new thermometer since all of my temps were (supposedly) dead on and I've brewed on other peoples systems and always had 80-85%.
I just want to be sure, I should trust the new thermometer right?