After much frustrations with the Onset H8 Hobo dataloggers, I found the PEM2 T/RH datalogger from the Rochester Inst. of Technology.  They run about $355 each, collect data for up to 10 years w/o needing to download, and the best part is the software is free and online. If you'd like to see sampling data from OKCMOA, go to www.pemdata.com, type 'OKCMOA' for the id, and 'guest' as the password.  For registrars that are asked to send 3-4 months worth of data charts for loans or exhibitions, all you need to do is give the lender the id and guest password and they can see your data instantly. Has anyone had experience with the PEM2??

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