The HI7631233 integrated temperature sensor adjusts the measured conductivity to a reference temperature by applying compensation algorithms. The electrolytic conductivity (EC) reading from the HI7631233 sensor can be used to calculate Total Dissolved Solids (TDS), Resistivity, and Salinity (PSU, ppt, or %).
- TDS is a calculated value based on the conductivity of the solution (TDS = factor × EC25). A TDS factor is a conversion factor used to change an EC measurement to a ppm (or ppt) measurement.
- Salinity (PSU) relates the ratio of electrical conductivity of a normal seawater sample at 15 °C and 1 atmosphere to a potassium chloride solution (KCl) with a mass of 32.4356 g/Kg water at the same temperature and pressure. Under these conditions, the ratio is equal to 1 and S=35. The practical salinity scale may be applied to values 0 through 42.00 psu at temperatures between 0 to 35 °C.
- Salinity (ppt) measurements are based on the 0.00 to 80.00 g/L Natural Seawater Scale from 10 to 31 °C. It determines the salinity based upon a conductivity ratio of sample to standard seawater at 15 °C and an approximate salinity value of 35 in seawater.
- Salinity (%) in this scale 100% salinity is equivalent to roughly 10% solids.