Place the digital displays on a board and take a picture of them the required 50 times.
Done! It meets the specification given in your post. Maybe you wanted ready to use numbers in a spreadsheet but years ago I did it this way since PCs didn't exist in 1980.
I need to record maybe 50 readings from 6 digital thermometers with wired probes. This is close to datalogging, but I can't do the expense of buying a true datalogger, especially 6 of them. Neither do I really want to get into arduino etc scratch-builds. There has to be a real simple way do do this.
Who carries (cheap) multichannel analog pc boards anymore? Or, can this be done using either serial or printer port?
I don't mind hacking into the thermos if I had an idea that the actual temp readings were available inside, in some form I could use directly, such as a voltage level.
At this level of thinking, I'd sure appreciate a shove in the right direction. Maybe someone else has gone down this road before and would like to share, or maybe just give me a few brainstorm ideas to look into. Any help would be appreciated.