Hi Julie – I used a HOBO Pro V2 Ext Temp/RH logger for my MA research. They are built to monitor outdoor conditions and worked well during my study. Our freezer conditions are -35C. Not sure if this recommendation will be helpful, since the lowest operating temperature for the unit is -40C.
https://www.onsetcomp.com/products/data-loggers/u23-002?creative=178262173812&keyword=&matchtype=&network=g&device=c&gclid=EAIaIQobChMImJ2k5u6t5gIVJYNaBR2W5wyEEAQYAyABEgKfC_D_BwE William William Donnelly (he, him, his) Assistant Preventive Conservator & Affiliated Instructor WUDPAC Winterthur Museum, Garden & Library Direct 302.888.4680 5105 Kennett Pike Winterthur, DE 19735 winterthur.org From: [email protected] <[email protected]> On Behalf Of [email protected] Sent: Monday, December 9, 2019 4:51 PM To: Museumpests <[email protected]> Subject: [pestlist] Freezer Datalogger: Recommendations? Hello, Pestlist Looking for recommendations for a freezer treatment datalogger that can go to very low temps. Backstory: We set our freezer to stay between -35 and -25F (the variation from its cycling). However, there are instances where the temperature has dipped below -40F (which is also -40C if anyone else thinks that's interesting!). Unfortunately, -40 is the temperature our Onset HOBO bluetooth loggers lose functionality. One by one they have been erroring. After it happens once that logger can no longer function at temperatures under -20Fish. Have others ran into this problem? Ideally our freezer wouldn't get that low, but this is a problem that seems to happen sporadically despite regular maintenance. Can anyone recommend a logger that functions under -40F? I see many that have probes, but those will not work with our setup. I've looked into Onset and Thermoworks primarily, I'd be happy to investigate other big names if suggested. Regards, Julie McInnis Collections Care Specialist Fine Arts Museums of San Francisco -- You received this message because you are subscribed to the Google Groups "Museumpests" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]<mailto:[email protected]>. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/ebd60997-acca-4866-88e4-c00ef541a2ca%40googlegroups.com<https://groups.google.com/d/msgid/pestlist/ebd60997-acca-4866-88e4-c00ef541a2ca%40googlegroups.com?utm_medium=email&utm_source=footer>. This message came from outside of Winterthur, and has been scanned for viruses. -- You received this message because you are subscribed to the Google Groups "Museumpests" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/6c3002d4938e4e8c94a6e483a0255038%40winterthur.org.
