I've been trying to locate an inexpensive digital thermometer with a probe to use for dry ice. Many of the cheaper ones I'm finding say they will go "-40C to 120C" or something similar.

Example: http://cgi.ebay.com/Digital-LCD-Ther...3A5%7C294%3A50

Being that I'm just using dry ice and mainly need the probe to monitor swing (have a small aluminum pot but just benching dual cores) do you guys think a probe rated to -50C will be sufficient? I assume the thermometer will display lower than -50C, but not 100% sure.