The following links will provide you with greater details on the unique characteristics of saltwater, especially in regards to conductivity and temperature.
- The Fundamental Conductivity and Resistivity of Water
- Theory and Application of Conductivity
By Truman S. Light, Stuart Licht, Anthony C. Bevilacqua, and Kenneth R. MorashElectrochemical and Solid-State Letters (2005)
Rosemount Analytical / Emerson Process Management (2004)