Good subject and a good thread. I've done temp logging three times at eclipses, 2 successfully and one failure. The failure was using an Extech data logger with a sensor surrounded by too much plastic case resulting in too much thermal mass. The device could not respond quickly enough to register the subtle, but steady drop at the temperature at the 2017 eclipse. I used a device called a Thermochron iButton in 2002 and 2019. They are wonderful! You program them to start and stop logging data with a computer using their mini-docking station. Then after the event you download the data. They have a low thermal mass so the respond quickly and they have a small plastic hanger so you can hang them anywhere in the shade.
I think the Elitech device shown by BellX2 in the initial post will have too much self-thermal-mass to respond quickly enough to eclipse ambient air temperature changes. I've made the same mistake. Chapter 4 of my book is about measuring eclipse temperature changes.
You saved me from making a big mistake. Turns out the Elitech that I bought has an optional attachment for an external probe. It simply replaces the USB cover. The only bad part was they didn't sell it on Amazon so I had to pay extra shipping but thats much easier than having to return everything.
I really appreciate you posting those pages.
I will still be filming a analogue thermometer as a backup too. Only get one try at this unless I want to travel to see the next one.
Edited by BellX2, 24 August 2023 - 11:27 PM.