Temperature - ±0.2 °C 
Dissolved Oxygen - 0 to 200%: ±1% of reading or 1% saturation, whichever is greater 200 to 500%: ±8% of reading 0 to 20 mg/L: ±0.1 mg/L or 1% of reading, whichever is greater 20 to 50 mg/L: ±8% of reading 
Conductivity - 0 - 100 mS/cm: ±0.5% of reading or .001 mS/cm, whichever is greater 100 - 200 mS/cm: ±1.0% of reading 
Specific Conductance - 0 - 100 mS/cm: ±0.5% of reading or .001 mS/cm, whichever is greater 100 - 200 mS/cm: ±1.0% of reading User selectable reference temperature (15 to 25 °C; default 25 °C) and compensation coefficient (0 to 4%/°C; default 1.91%) 
Salinity - ±1.0% of reading or ±0.1 ppt, whichever is greater 
Total Dissolved Solids (TDS) - Calculated from specific conductance and a user-selectable TDS multiplier (0.30 to 1.00; default 0.65) 
Seawater Density - Sigma is calculated from salinity, temperature, and pressure (depth) Sigma T is calculated from salinity and temperature 
Resistivity - ±0.1% Full Scale  |