Onset U24-001 HOBO Fresh Water Conductivity Data Logger

Measurements: Actual Conductivity, Temperature, Specific Conductance at 25°C (calculated) 

Conductivity Calibrated 

Measurement Ranges: Low Range: 0 to 1,000 µS/cm; Full Range: 0 to 10,000 µS/cm 

Conductivity Calibrated Range - Temperature Range: 

5° to 35°C (41° to 95°F) 

Conductivity Extended Ranges: Low Range: 0 to 2,500 µS/cm; Full Range: 0 to 15,000 µS/cm 

Temperature 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 measurements 

Conductivity 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) 

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)