Onset HOBO U24 Conductivity Data Loggers

HOBO U24: Intelligent Water Quality Monitoring in Any Environment

All-in-one solution for accurate measurement of conductivity, salinity and temperature in aquatic environments

These high-precision conductivity data loggers are a cost-effective way to collect water quality data. The HOBO U24-001 data logger records both conductivity and temperature measurements in streams, lakes and other freshwater sources. This data logger is recommended for monitoring aquifers for saltwater intrusion and runoff from roads or agricultural land.

The HOBO U24-002-C is a cost-effective data logger for measuring salinity, conductivity and temperature in saltwater environments with relatively small changes in salinity (± 5,000 µS/cm), such as saltwater bays, or for detecting salinity events such as surges, storms or discharges. It can also be used to collect salinity data for salinity compensation of HOBO U26 dissolved oxygen data.

This open-to-its-sensor product simplifies cleaning and maintenance. The non-contact HOBO sensor minimizes measurement errors related to changes. In addition, the data loggers feature software-based shift compensation.

Key Features

• Non-contact sensor offers long life and fewer measurement shifts.
• Provides easy access to the sensor for cleaning and air bubbles.
• HOBOware Pro software allows start/end point calibration to compensate for any fouling and provides easy conversion to specific conductivity and salinity.
• Optical USB interface offers high-speed, reliable data download in humid environments.
• Compatible with the HOBO U-DTW-1 Waterproof Shuttle for easy and reliable data capture and transport.
• Delrin housing does not corrode with sea salt.
• Two user-selectable ranges provide measurements from 100 to 55,000 µS/cm for the Saltwater data logger.

In what environment does this data logger work?

It works in outdoor and underwater environments.

What measurements does this data logger support?

Supports conductivity/salinity and temperature.

Note: When monitoring salinity in waters with more than +/- 5,000 µS/cm variation, refer to the accuracy shown in Plot C in the product specifications to determine if the accuracy is acceptable for your needs. Monthly field calibration readings are generally required to achieve the best accuracy.

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents