Oxygen saturation

The RBRsolo⁴ ODO and the RBRduet⁴ D.ODO measure dissolved oxygen concentration.

When a sensor measures oxygen concentration, we derive oxygen saturation using the Garcia and Gordon equation. See Oxygen solubility in seawater: better fitting equations by H. E. Garcia and L. I. Gordon for details.

The Garcia and Gordon equation requires values for absolute temperature (in °K) and salinity, which Ruskin derives from measured temperature and conductivity. As your instrument does not measure conductivity, Ruskin uses a default value of 35PSU. Alternatively, enter conductivity manually in the Parameters table under the Calibration tab in Ruskin. See Ruskin User Guide: Compact Instruments⁴.