We use Onset 'Hobo' temp & humidity loggers for this purpose but download periodically. Checking their website they also manufacture a good range of wireless systems. Hope this is helpful. Peter B. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of TechNet automatic digest system Sent: 30 November 2012 06:00 To: [log in to unmask] Subject: [SPAM?] TechNet Digest - 28 Nov 2012 to 29 Nov 2012 (#2012-308) ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________