I've been wanting a lead thermometer for a while so I got one of the new digital lymans. It worked great in the house but when I went to use it in the lead pot well lets just say it doesn't inspire confidence. According to it molten lead is 200 degrees F yet the heating coils of the space heater in my workshop is 350 degrees. I tried a different battery and that didn't help. Another thing I noticed is the numbers sure do change slow. Anybody else having problems with one of these things? I guess I should have done a little more research. Yes it is connected right and it is set for Fahrenheit not Celsius.