Fully automatic, the NSB TECH offers a precise test of salt concentration in crude oil. This test measures conductivity in the crude oil due to the presence of common chlorides, such as sodium, calcium, and magnesium by electronical methods. Knowledge of the chloride concentration gives information on the efficiency of the desalination process and provides a solid basis for assessing the need for crude oil desalting. The corrosion rates in refining units depend on the chloride concentration.