What are the best loggers for obtaining changes in snow cover temperature at different depths with changes in air temperature? What are the long-term data loggers without recharging? What loggers come with a great software product?
I used inexpensive Onset Hobo digital temp recorders in streams. I put them in whirlpak plastic bags which generally worked well at keeping them dry, but I think the new versions may be water proof. I tried to revisit about monthly, but they can record much longer periods.
Here is link. Today they are more costly, some water proof and have many added features such as blue tooth downloading I saw on one version I looked at briefly.