Cylindrical flow-through borosilicate glass cell with three internal platinum electrodes. The electrode arrangement offers distinct advantages over inductive or open external field cells. A unique Sea-Bird design feature introduces a fixed conductivity offset, permitting the SBE 4 to measure conductivity down to 0 for fresh water work.
Built-in acquisition circuits and frequency outputs; allows for calibration as separate modules.
High Quality Calibration
Each sensor calibrated over the range of 2.6 to 6 S/m in a computer-controlled bath, using natural seawater; a water sample at each point is compared to IAPSO seawater using a Guildline AutoSal.
Conductivity Accuracy:± 0.0003 S/m
Conductivity Measurement Range:0.0 - 7.0 S/m
Conductivity resolution:0.00004 S/m at 24 Hz
Conductivity Response Time:0.060 sec (pumped)
Conductivity Settling Time:< 0.7 sec to within 0.0001 S/m
Conductivity Typical Stability:0.0003 S/m per month
Housing Material:6800 m Aluminum
Output Signal:1 V square wave capacitively coupled
Power input:6 - 24 VDC; 18 mA at 6V, 12 mA at 10 - 24 V