Autonomous temperature logging in any environment between -30ºC and 60ºC. These loggers are extremely robust, having been deployed to depths of 4000 meters. They can withstand UV light, slightly corrosive environments such as seawater, wave impacts, and ice scouring. The loggers can collect data autonomously in remote locations for years. In the marine realm, they have already been deployed in under-sampled environments such as intertidal zones, coastal areas, recreational boat hulls, coral reefs, floating or anchored platforms, and deep-sea locations up to approximately 4000 meters depth. They have even been used in citizen science contexts, attached to divers' gear or worn as bracelets by beachgoers.