Thread title says it all. I can't for the life of me figure out why I would do this. I can definitely see wanting one for a mash tun, but why would someone care what the temperature is in the boil. You are just boiling right? I guess I could see it as a way to make sure you have cooled enough to transfer to the fermenter and pitch yeast, but that hardly seems worth the investment. Anyone care to educate me?