Hi Shelley, We use the Onset LCD series dataloggers. We went with these because they have a display (the Hobos do not) that shows current temp and RH plus a flashing warning indicator when the temp or humidity exceeds the parameters that you set. They are easy to program, easy to download, and don't require calibration. They are about $190 each. You will also need one download cable and one copy of the software which is another $100. Feel free to contact me for more info or to see them in action. Sincerely, David Ryan Registrar Colorado Springs Pioneers Museum www.cspm.org ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).