Onset U24-002-C U24-002-C: HOBO Salt Water Conductivity/Salinity Data Logger (100~10.000 µS/cm/ 5.000~55.000 µS/cm; -2°~36°C)

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 (41° to 95°F) 

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 (28° to 97°F) 

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: 0.1°C (0.2°F) at 25°C (77°F) 

Temperature Resolution: 0.01°C (0.02°F) 

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 

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) 

Delivery scope: 

  HOBO U24-002-C Conductivity Data Logger

  Communications window protective cap