HOBO™ Saltwater Conductivity and Salinity Data Logger
- Non-contact Sensor Minimizes Drift-Related Measurement Errors
- Also Features Open Access to Sensor for Cleaning and Software-Based Drift Compensation
- Software Enables Start/End-Point Calibration to Compensate for Fouling and Easy Conversion to Specific Conductance and Salinity
- 5,000 to 55,000 µS/cm (Conductivity Extended Range) and 5°C to 35°C (Temp) Measurement Ranges
- 3 Year Battery Life with Factory Replaceable Battery
- Stores at Least 14,400 Sets of Measured Readings
- Requires HOBOware Pro Software Download (Version 3.2+)
Designed for Saltwater Sources. See the U24-001 for Fresh Water Sources
Overview of the HOBO™ U24-002-C Salinity, Conductivity, & Temp Data Logger
The LI-Cor HOBO™ U24-002-C is a cost-effective data logger designed to measure salinity, conductivity, and temperature in saltwater environments. This is an ideal solution for monitoring relatively small changes in salinity (±5,000 μS/cm) such as in saltwater bays, or to detect salinity events, such as upwelling, rainstorm, or discharge events. When combined with data from the HOBO™ U26 Dissolved Oxygen logger you can monitor percent dissolved oxygen saturation. Downloading the logger can be done in less than 30 seconds using the required optical USB interface (BASE-U-4 or U-DTW-1). The logger is configured, and data is viewed using either free HOBOware or HOBOware Pro (paid) software.
Note: For monitoring salinity in waters with more than ±5,000 μS/cm variation, we recommend the U24-001 for its increased accuracy.
HOBO™ U24-002-C Saltwater Conductivity Data Logger Specifications
| Data Channels | 2 Channels (Conductivity or Salinity and Temperature) |
| Conductivity (Salinity) |
Calibrated Low Range: 100 to 10,000 µS/cm @ 5°C to 35°C) Calibrated Full Range: 5,000 to 55,000 µS/cm @ 5°C to 35°C) Resolution: 2 µS/cm Accuracy (Low Range): 3% of Reading, or 50 µS/cm Accuracy (High Range): 5% of Reading* Drift: Up to 12% per month in saltwater (exc. drift from fouling) * In waters within a range of 3,000 µS/cm |
| Temperature | Measurement Range: 5°C to 35°C (41°F to 95°F) Resolution: 0.01°C (0.02°F) Accuracy: 0.1°C (0.2°F) |
| Response Time | 1 second to 90% of Change (In Water) |
| Data Storage Capacity | 1 Conductivity Range: 18,500 Measurement Readings 2 Conductivity Ranges: 14,400 Measurement Readings |
| Sampling Rate | 1 Second to 18 Hours (User-Specified) Up to 8 Sampling Intervals User-Defined |
| Operating Range | Temperature: -2°C to 36 °C (28°F to 97°F) - Non-Freezing |
| Battery | 3.6 Volt Lithium Battery - Factory Replaceable Only |
| Battery Life | 3 Years @ 1 Minute Sampling Rate (Dependant Upon Environment and Operating Range) |
| Maximum Depth | 70 Meters (225 feet) |
| Sample & Event Logging | Samples: Recorded Sensor Measurements Events: Logger Activity (ie: Bad Battery, Host Connected) |
| Wetted Housing Materials | Delrin, Epoxy, Stainless Steel Retaining Ring, Polypropylene, Buna Rubber O-Ring, Titanium Pentoxide (Inert Coating Over Sensor) Note: All Materials Are Suitable for Long-Term use in Saltwater |
| Communications | USB optical Interface for Downloading Data. Requires Base Station (U-DTW-1 or BASE-U-4) |
| Software Compatibility | HOBOware PRO Version 3.2+ |
| OS Compatibility | Windows: Windows 10, 8.1, 8 and 7 Mac: OS X 10.9.x, 10.10.x and 10.11.x |
| Standards Compliance | CE |
| Weight | 193 grams (6.82 oz.) Buoyancy in Freshwater: -59.8gm (-2.11 oz.) |
| Dimensions | 3.18cm x 16.5cm (1.25" x 6.5") Mounting Hole: 6.3mm (0.25") |
