"Remi" wrote in message
news:_Ir%g.184263$1T2.25353@pd7urf2no...
I want a room thermometer that will instantly (or at least very quickly)
tell me the room temperature as I move from room to room. Is there such a
thing, and if so, where can I buy one? Thanks.


I don't know how instant they are, but Radio Shack sells digital
thermometers. You might need to put up with waiting a minute, but that's
certainly better than using a glass & liquid thermometer.