I am working on a conservation project at Florissant Fossil Beds National Monument. We are attempting to track and ultimately prevent further damage to the petrified trees here. These petrified redwood trees have numerous cracks and fissures in them and we would like to place a data logger into one or more of the these cracks as well as one outside the tree(s) in an effort to track the temperature and humidity changes within the trees compared to out in the open. We are looking for the most cost-efficient option as well as the most reliable one. We would like to sample once an hour for a year at a time. Any help or suggestions that you may have would be greatly appreciated.