Water and soil salinity are measured by passing an electric current between the two electrodes of a salinity meter in a sample of soil or water. The electrical conductivity or EC of a soil or water sample is influenced by the concentration and composition of dissolved salts.

What is the instrument used to measure salinity?

salinometer, also called salinimeter or salimeter, device used to measure the salinity of a solution. It is frequently a hydrometer that is specially calibrated to read out the percentage of salt in a solution.

How do you measure the salinity of seawater?

You can easily measure the salinity of sea/ocean water using an instrument called a refractometer, which measures the index of refraction of a particular substance. It is a device used in geology, medicine and agriculture. Set up your refractometer device by dropping three drops of distilled water on its meter.