Hi Randy, I've not used these but have used other temp/humidity logging devices from ThermoWorks. Seem to be good quality and free software. http://www.thermoworks.com/products/logger/logmaster_quadtemp_octtemp.html http://www.thermoworks.com/products/probe/tc_penetration.html A bit pricey, $599 for 4 channel logger and about $50 per probe. Brion *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html Guidelines for posting to BEE-L can be found at: http://honeybeeworld.com/bee-l/guidelines.htm