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U24-002 Salt Water Conductivity Data Logger

U24-002 Salt Water Conductivity Data Logger
£79900

(£958.80 incl VAT)
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Model:U24-002C

Description

The HOBO U24-002 Conductivity/Salinity Logger is a high-accuracy, 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 to detect salinity events such as upwelling, rainstorm, and discharge events. The logger significantly reduces the cost of conductivity/salinity monitoring while making logger maintenance easier than ever.

 

IMPORTANT: The Hobo Pro software and base unit need to be purchased with this logger. Please order via the Recommended products area (below).

 

When monitoring salinity in waters with more than +/-5,000 uS/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 typically required to achieve the best accuracy.

Features

  • Non-contact sensor reduces measurement error from fouling
  • Provides easy access to sensor for cleaning and shedding air bubbles
  • Two user-selectable ranges provide measurements from 100 to 55,000 uS/cm.
  • The Delrin housing will not corrode in saltwater
  • HOBOware Pro software enables start/end-point calibration to compensate for any fouling and provides easy conversion to specific conductance and salinity using the Practical Salinity Scale 1978 (PSS-78)
  • USB optical interface provides high-speed, reliable salinity data offload in wet environments
  • Compatible with the HOBO Waterproof Shuttle for easy and reliable data retrieval and transport

Specifications

  • Measurements: Actual Conductivity, Temperature, Specific Conductance at 25C (calculated), Salinity (calculated using PSS-78, the Practical Salinity Scale 1978)
  • Conductivity Measurement Range: (Calibrated Range)
    High Range: 5000 to 55,000 uS/cm 
    Low Range: 100 to 10,000 uS/cm

    Over the range of 5 to 35C (41 to 95F)
  • 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 36C (28 to 97F)
Plot A: Salinity Range (U24-002)*
Plot A: Salinity Range
Plot B: Specific Conductance Range in Saltwater
Plot B: Specific Conductance Range in Saltwater

Plot C: Specific Conductance High-Range Accuracy

Plot C: Comparison of Conductivity Calibrated Measurement Ranges

  • Accuracy: 
    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 (see Plot C)
    Temperature: 0.1°C (0.2°F) (in calibrated range)
  • Resolution:
    Conductivity: 2 uS/cm 
    Temperature: 0.01°C (0.02°F)
  • Drift:
    Conductivity: 
    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)
  • Operating Range: -2 to 36C (28 to 97F) – non-freezing
  • Memory: 18,500 temperature and conductivity measurements when using one conductivity range; 14,400 sets of measurements when using both conductivity ranges (64kbytes)
  • 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 life: 3 years (@ 1 min logging)
  • Maximum Depth: 70 m (225')
  • Weight: 193 gm (6.82 ounces), buoyancy in freshwater: -59.8 gm (-2.11 ounces)
  • Size: 3.18 cm diameter x 16.5 cm, with 6.3 mm mounting hole (1.25" diameter x 6.5", ¼" hole)
  • Wetted Housing Materials: Delrin housing, 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.

Applications

 Include:

  • Climate studies
  • Irrigation management
  • Ocean ecology
  • Storm water impact
  • Wetlands restoration
  • Environmental impact
  • Water Quality monitoring 

Description

The HOBO U24-002 Conductivity/Salinity Logger is a high-accuracy, 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 to detect salinity events such as upwelling, rainstorm, and discharge events. The logger significantly reduces the cost of conductivity/salinity monitoring while making logger maintenance easier than ever.

 

IMPORTANT: The Hobo Pro software and base unit need to be purchased with this logger. Please order via the Recommended products area (below).

 

When monitoring salinity in waters with more than +/-5,000 uS/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 typically required to achieve the best accuracy.

Features

Specifications

Plot A: Salinity Range (U24-002)*
Plot A: Salinity Range
Plot B: Specific Conductance Range in Saltwater
Plot B: Specific Conductance Range in Saltwater

Plot C: Specific Conductance High-Range Accuracy

Plot C: Comparison of Conductivity Calibrated Measurement Ranges

Applications

 Include:

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