The salinity of ocean water can be determined by measuring the conductivity of the water. The characteristics of water such as salinity, depth, temperature, density can be defined by the instrument called Conductivity Temperature Depth instrument. This instrument is placed in water which is to be measured. As this instrument is lowered into the water it continuously records the conductivity, temperature and depth of the water. The electric current is flowed through the water and as we know salt water is a good conductor of electricity it will pass the current fast. Using this technique oceanographers determine the salinity of water.
