Nick wrote, "Thanks for posting that Dale!
I've been looking for a light weight thermometer that records low temp. It would be nice to know how cold it actually got at night.
Where can i find the kitchen one you pictured?"
It shuts off after a while, so you won't get continuous readings. The high/low temp recorded is the extreme of whatever was sampled after the last time it was cleared. I'm sure you can find some sort of data logging thermometer, but at greater weight, expense I would expect more battery costs.
eBay has many auctions for this type and you can buy them in most professional restaurant supplies. This is similar to mine and I searched on "digital pocket thermometer": http://www.ebay.com/itm/TPI-Digital-Pocket-Thermometer-315-/270895577343
I noticed that some have magnets, which I avoid because of possible issues with my compass.