Oral not Rectal, it affects the taste

Thermometer for Brewing or Roasting? There are so many out there, any really works. Id avoid the 10 dollar chineese specials, and you don't need to pay 80 dollars either.
One thing to keep in mind, you might want to go with one that takes AA or AAA batteries .vs. the button cells, it will be a little cheaper in the long run on battery price that way. You won't need the alkaline, lithium batteries or anything like that either. T-moms are so little drain, the el cheapo plain batteries work fine.
Aaron