Oxygen concentration

When a sensor measures oxygen saturation, we derive oxygen concentration using the Weiss equation. See The solubility of nitrogen, oxygen and argon in water and seawater by R.F. Weiss for details.

The units of measurement may be µMol/L, mg/L, or mL/L.

The Weiss 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.