U23 Series
![U23 Series U23 Series](https://bakrona-zuerich.ch/media/catalog/category/thumb-u23.jpg)
Onset now offers the next generation of temperature and relative humidity data loggers - The HOBO Pro v2 Series:
Weatherproof data loggers for use in outdoor/condensing environments
User-replaceable relative humidity sensors
Internal and external sensor models available
Optic USB interface for fast and reliable data offload
Stores 42,000 temperature & humidity measurements
3-year user-replaceable battery