Modell ONS-U24-002-C
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The HOBO U24 Conductivity logger (U24-002-C) measures actual conductivity and temperature, and can provide specific conductance at 25°C and salinity with the HOBOware® Conductivity Assistant. This easily deployable, rugged logger is ideal for environments with relatively small changes in salinity (±5,000 µS/cm), such as saltwater bays, or to detect salinity events, such as upwelling, rainstorm, and discharge events. This logger can also be used to gather salinity data when deployed with a HOBO U26 Dissolved Oxygen logger. An optional U2X Protective Housing accessory (HOUSING-U2X) is available to further protect the logger, reduce fouling, and simplify mounting in harsh environments.
| Spezifikationen | |||
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| Sensors | |||
| Measurements | Actual Conductivity, Temperature, Specific Conductance at 25°C (calculated), Salinity (calculated using PSS-78, the Practical Salinity Scale 1978) | ||
| Conductivity Measurement Ranges | Low Range: 100 to 10,000 µS/cm High Range: 5,000 to 55,000 µS/cm | ||
| Conductivity Calibrated Range - Temperature Range | 5° to 35°C | ||
| Conductivity Extended Ranges | Low Range: 50 to 30,000 µS/cm High Range: 1,000 to 55,000 µS/cm (readings below these ranges reported as 0) | ||
| Temperature Measurement Range | -2° to 36°C | ||
| Specific Conductance Accuracy (in Calibrated Range using Conductivity Assistant and Calibration Measurements) | Low Range: 3% of reading or 50 µS/cm, whichever is greater High Range: 5% of reading, in waters within a range of ±3,000 µS/cm of the calibration point; waters with greater variation can have substantially greater error | ||
| Conductivity Resolution | 2 µS/cm (typical) | ||
| Temperature Accuracy (in Calibrated Range) | 0.1°C | ||
| Temperature Resolution | 0.01°C | ||
| Conductivity Drift | Up to 12% sensor drift per month, exclusive of drift from fouling. Monthly start- and end-point calibration should be used with HOBOware Conductivity Assistant to achieve the specified Specific Conductance accuracy | ||
| Response Time | 1 second to 90% of change (in water) | ||
| Logger | |||
| Operating Range | -2° to 36°C - non-freezing | ||
| Memory | 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) | ||
| 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 | ||
| Weight | 193 g, buoyancy in freshwater: -59.8 g | ||
| Size | 3.18 cm diameter x 16.5 cm, with 6.3 mm mounting hole | ||
| Wetted Housing Materials | Delrin®, epoxy, stainless steel retaining ring, polypropylene, Buna rubber O-ring, titanium pentoxide (inert coating over sensor) all materials are suitable for long-term use in saltwater | ||
| Datenlogger > Datensammler und Software | Modell | Beschreibung | Einsetzbar mit |
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| Datenlogger > Unterwassereinsatz | Modell | Maximale Wassertiefe | Mess-/Überwachungsgröße | Mess-/Überwachungsbereich | Messwerte/Statuswechsel |
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