Documentation for U12-012HOBO Temperature/Relative Humidity/Light/External Data Logger View U12-012 ResourcesAll Resources All U12-012 Documentation 3 results found. HOBO U12 Temp/RH/Light External Data Logger (U12-012) User's Manual (CE compliant) Read more U12 Data Logger Data Sheet Read more Quick Start for the HOBO® U-Series Data Logger Read more