Starting at $145.00

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  • Weatherproof housing
  • Memory: 42,000 measurements
  • Temp measurement range -40 up to 212°F
  • Temp accuracy ±0.21°C
  • RH measuring range 0 to 100%
  • RH accuracy ±2.5%
  • 1 second to 18 hour sampling rate

The HOBO U23 Series Pro v2 Loggers are weatherproof loggers that provide high-accuracy temperature and relative humidity measurements in a wide range of outdoor environments. The replaceable RH sensor provides superior recovery from condensing conditions. It's small diameter, external sensor versions are for measurements in tight places.

Required Components

These additional components are required for the operation of your product. We strongly advise you to purchase these components unless you already own them or own a suitable alternative.

HOBO U-DTW-1 Waterproof Shuttle Data Transporter
Compatible with all HOBO U-Series loggers with optic USB, waterproof up to 20m (66ft), requires HOBOware Pro software
HOBO BASE-U-4 Optic USB Base Station
Used to offload data from any HOBO data logger with an Optic USB interface, splash resistant
In Stock


HOBO HOBOware Pro Software
Plot or export data to spreadsheets, time saving tools to fast setup, readout and export, compatible with all HOBO data loggers
In Stock