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OVERVIEW
An accurate and cost-effective fresh water logger
This high-accuracy conductivity data logger is a cost-effective way to collect water quality data. The HOBO U24 measures and records both conductivity and temperatures in streams, lakes, and other freshwater sources. This logger is recommended for monitoring aquifers for saltwater intrusion and road and agricultural runoff. This product’s open access to its sensor simplifies cleaning and maintenance. The HOBO U24’s non-contact sensor minimizes measurement errors related to drift. In addition, the logger features software-based drift compensation.
- Non-contact sensor provides long life and less measurement drift
- Provides easy access to sensor for cleaning and shedding air bubbles
- HOBOware Pro software enables start/end-point calibration to compensate for any fouling and provides easy conversion to specific conductance and salinity
- USB optical interface provides high-speed, reliable data offload in wet environments
- Compatible with the HOBO Waterproof Shuttle for easy and reliable data retrieval and transport
The HOBO U24 Conductivity data logger features a non-contact sensor with a Titanium Pentoxide coating. This coating prevents the sensor from coming in contact with the water, which in turn prevents tarnishing or corrosion associated with traditional electrode sensors. This sensor coating is also inert, enabling fouling to be easily wiped off the sensor.
Important Information
Requires HOBOware Pro software and either a U-DTW-1 Waterproof Shuttle or the Base-U-4 Optic USB Base Station for configuration and data offload. Please see Related Products below.
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SPECIFICATIONS
Measurements Actual Conductivity, Temperature, Specific Conductance at 25°C (calculated) Conductivity Calibrated
Measurement RangesLow Range: 0 to 1,000 μS/cm
Full Range: 0 to 10,000 μS/cmConductivity Calibrated
Range – Temperature Range5° to 35°C (41° to 95°F) Conductivity Extended
RangesLow Range: 0 to 2,500 μS/cm
Full Range: 0 to 15,000 μS/cmTemperature Measurement
Range-2° to 36°C (28° to 97°F) Specific Conductance
Accuracy (in Calibrated
Range)Low Range: 3% of reading, or 5 μS/cm, and
Full Range: 3% of reading, or 20 μS/cm, whichever is greater, using Conductivity Data Assistant and calibration measurementsConductivity Resolution 1 μS/cm Temperature Accuracy 0.1°C (0.2°F) at 25°C (77°F) Temperature Resolution 0.01°C (0.02°F) Conductivity Drift Less than 3% sensor drift per year, exclusive of drift from fouling Response Time 1 second to 90% of change (in water) Operating Range -2° to 36°C (28° to 97°F) – non-freezing Memory 18,500 temperature and conductivity measurements when using one conductivity range; 11,500 sets of measurements when using both conductivity ranges (64 KB total memory) Sample Rate 1 second to 18 hrs, fixed or multiple-rate sampling with up to 8 user-defined sampling intervals Clock Accuracy ±1 minute per month Battery 3.6 Volt lithium battery Battery Life 3 years (at 1 minute logging) Maximum Depth 70 m (225 ft) Weight 193 g (6.82 oz), buoyancy in freshwater: -59.8 g (-2.11 oz) Size 3.18 cm diameter x 16.5 cm, with 6.3 mm mounting hole (1.25 in. diameter x 6.5 in., 0.25 in. hole) Wetted Housing materials Delrin®, epoxy, stainless steel retaining ring, polypropylene, Buna rubber O-ring, titanium pentoxide (inert coating over sensor) Environmental Rating IP68 CE The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).
HOBO U24 – Conductivity/Salinity (Fresh Water) Data Logger
$2,286.00 ex GST
Measures and records conductivity and temperature in streams, lakes, and other freshwater sources; recommended for monitoring aquifers for saltwater intrusion and road and agricultural runoff.
