U20L Series Water Level Loggers

HOBO U20L Series
Water Level Loggers

Low-Cost, Research-Grade

Just $299 USD!

See all HOBO Water Level Loggers

HOBO® U20L Water Level Logger

Get your HOBO U20L Series Water Level Logger now.

HOBO U20L Series Water Level loggers set a new price/performance standard for water level and temperature monitoring. The loggers combine 0.1% measurement accuracy, a rugged enclosure, and a non-vented design for convenient deployment.

  • Self-contained, non-vented design
  • Ideal for use in both fresh and saltwater environments
  • Durable ceramic pressure sensor
  • Ideal for wells, streams, lakes, wetlands and tidal areas


Use in salt and fresh water applications


Non-vented design enables easy deployment & readout

Accurate Data, Easily

HOBOware Pro software provides easy conversion to accurate water level reading, fully compensated for barometric pressure, temperature, and water density.

Download White Paper

Choosing a Water Level Logger Guide

Choosing A Water Level Logger:
5 Things You Should Know

This paper provides hydrology, ecology, stormwater, and waterworks professionals with valuable tips on how to evaluate specific water level data loggers, and points out key factors to be aware of during the product selection process.