• Water Level, Barometric Pressure, Pressure (Absolute), Temperature measurements
  • Self-contained non-vented design
  • Fresh and salt water environments
  • Up to 100 ft water level range (0 to 58 psia)
  • Water level accuracy ± 0.1% FS
  • Temperature range: -4 to 122°F (-20 to 50°C)
  • Temperature accuracy: ±0.37° @ 20°C/±0.44° from 0 to 50°C
  • Durable ceramic pressure sensor


The HOBO U20L Series Water Level Loggers set a new standard for price/performance for accurate water level and temperature monitoring. Priced at just $299, the loggers combine 0.1% measurement accuracy, a polypropylene housing for use in both fresh and salt water, and a non-vented design for convenient and hassle-free deployment.

The U20L Series can be used in a range of environmental monitoring applications, from ecology studies to hurricane storm surge monitoring.


This product can be used in the following applications:

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