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HOBO® U24 Conductivity Logger (U24-001) Manual
HOBO Conductivity Logger
U24-001
Included Item:
• Communications window
protective cap
Required Items:
• Coupler (COUPLER2-C) with
USB Optic Base Station (BASE-
U-4) or HOBO Waterproof
Shuttle (U-DTW-1)
• HOBOware Pro 3.2 or later with
the Conductivity Assistant 2.1
or later
Accessories:
• U2X Protective Housing
(HOUSING-U2X)
• Replacement communications
window protective caps
(U22-U24-CAP)
15070-F MAN-U24x
The HOBO U24 conductivity logger measures actual conductivity and temperature, and can
provide specific conductance at 25°C with the HOBOware® Conductivity Assistant. These
easily deployable, rugged loggers provide the data you need for monitoring water purity
and the impact of pollutants in fresh water. There is an optional U2X Protective Housing
accessory (HOUSING-U2X) available to protect the logger and simplify mounting in harsh
environments.
Specifications
Measurements
Conductivity Calibrated
Measurement Ranges
Conductivity Calibrated
Range - Temperature Range
Conductivity Extended
Ranges
Temperature Measurement
Range
Specific Conductance
Accuracy (in Calibrated
Range)
Conductivity Resolution
Temperature Accuracy (in
Calibrated Range)
Temperature Resolution
Conductivity Drift
Response Time
Operating Range
Memory
Sample Rate
Clock Accuracy
Battery
Battery Life
Maximum Depth
Weight
Size
Wetted Housing Materials
Actual Conductivity, Temperature, Specific Conductance at 25°C
(calculated)
Low Range: 0 to 1,000 µS/cm
Full Range: 0 to 10,000 µS/cm
5° to 35°C (41° to 95°F)
Low Range: 0 to 2,500 µS/cm
Full Range: 0 to 15,000 µS/cm
-2° to 36°C (28° to 97°F)
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 measurements
1 µS/cm
0.1°C (0.2°F)
0.01°C (0.02°F)
Less than 3% sensor drift per year, exclusive of drift from fouling
1 second to 90% of change (in water)
-2° to 36°C (28° to 97°F) - non-freezing
18,500 temperature and conductivity measurements when using
one conductivity range; 14,400 sets of measurements when using
both conductivity ranges (64 KB total memory)
1 second to 18 hrs, fixed or multiple-rate sampling with up to 8
user-defined sampling intervals
±1 minute per month
3.6 Volt lithium battery
3 years (at 1 minute logging)
70 m (225 ft)
193 g (6.82 oz), buoyancy in freshwater: -59.8 g (-2.11 oz)
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)
Delrin®, epoxy, stainless steel retaining ring, polypropylene, Buna
rubber O-ring, titanium pentoxide (inert coating over sensor)
The CE Marking identifies this product as complying with all
relevant directives in the European Union (EU).
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Summary of Contents for Hobo U24
- Page 1 HOBO® U24 Conductivity Logger (U24-001) Manual The HOBO U24 conductivity logger measures actual conductivity and temperature, and can provide specific conductance at 25°C with the HOBOware® Conductivity Assistant. These easily deployable, rugged loggers provide the data you need for monitoring water purity and the impact of pollutants in fresh water.
- Page 2 NOTE: If you are using the HOBO Waterproof Shuttle as a Operation base station with a computer, briefly press the Coupler An LED in the communications window of the logger confirms Lever to put the shuttle into base station mode.
- Page 3 HOBO U24 Conductivity Logger (U24-001) Manual 3. Verify the status. Click the status button on the toolbar and Method 1: observe that the temperature is near the actual Taking readings directly in the water (recommended for temperature. locations with access for the field meter probe and with conductivity that is stable) 4.
- Page 4 Deploying the Logger The HOBO U24 Conductivity logger is designed to be easy to deploy in many environments. The small size of the logger is convenient for use in small wells and allows the logger to be Reading Out the Logger and Calibrating Data mounted and/or hidden in the field.
- Page 5 35°C (95°), and keeping the logger connected to © 2010–2013 Onset Computer Corporation. All rights reserved. Onset, HOBO, and HOBOware are 1-800-LOGGERS (564-4377) • 508-759-9500 trademarks or registered trademarks of Onset Computer Corporation.
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