Dear fellow ecologists, Does anyone have experience using HOBO pendant data-loggers (UA-002-08 or UA-002-64) outdoors below -20C? These units are only recommended for use above that temperature--the reason being that the CR2032 batteries can leak as a result of plastic warping below -20C. However, I've had them in the field overwinter, where they were exposed to temperatures as low as - 26C (at least, that's what they recorded) for a few nights, without apparent ill effects. I'm considering buying a bunch more of these, but since they'd likely be exposed to similar conditions, I'm wondering if anyone can either reassure me that they too will likely be OK, or else advise me to buy something else.
I'm not hugely concerned about the level of measurement inaccuracy below - 20 (they might be off by ~1C); I'm just concerned about survival afterward. I would like to retain the light-sensor feature, if possible. Please respond to me off-list at [email protected]. I can compile and post the responses, if there's interest. Thanks! Jessica Forrest Assistant Professor Department of Biology University of Ottawa Ottawa, ON, K1N 6N5 Canada
