I've been just monitoring the outside of the drum with a non contact but I'm sure the inside is much hotter by the rate that the meat has been cooking. I've gone cooler each time and that's seemed to help. I may be ok just to keep using that as the temps are predictable with my method. But I'm curious, is there a good thermometer I can drill a hole and install on my drum? Would I be better off getting a wireless type?