Thank you all for your informative comments on the uses you've had for the thermochron and hygrochron I buttons !!! They were very helpful. Most people found the Thermochrons worked well, one researcher reported about 10% failure. The hygrochrons (Hydrometer and temperature) had mixed results with most being negative for very humid environments. ( water condenses on them, not much accuracy above 75% humidity). Some researchers suggested encasing them in Marine goop, Marine Goop ( http://www.westmarine.com/**buy/products/15263-marine-** goop-adhesive-sealant-3-7-oz.**html<http://www.westmarine.com/buy/products/15263-marine-goop-adhesive-sealant-3-7-oz.html> ) or plastic bags ( I think they may have been referring to only the themochrons). The most important piece of information was relayed to me by two researchers, the fact that these i buttons may impact bats with their transmission, and they included a reference: Willis, C.K.R., J.W. Jameson, P.A. Faure, J.G. Boyles, V.Brack, and T.H. Cervone. 2009. Thermocron iButton and iBBat temperature dataloggers emit ultrasound. Journal of comparative physiology B: Biochemical, Systemic, and Environmental Physiology. 179:7 pages 867-874.
Thank you for helping, Wendy R. Townsend, PhD. OTS NAPIRE Coordinator