On the website it states "user sends the thermometer back to the manufacturer for recalibration after manufacturer's recomended interval"
Do any of you with traceable thermometers send them back for recalibration?
I'm not terribly concerned with an all-glass mercury thermometer altering its response. If I'm not mistaken, when it has altered its response, I'm likely to be calling on a haz-mat team to clean up the broken glass and spilled mercury. However, you are correct that I should have it checked if something really critical was hanging in the balance. OK OK, I know that mash temp is really critical, but maybe not that critical.