Starting at $195.00
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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.