measures conductivity (EC) to determine the salinity of natural and artificial seawater. Within seconds, the salinity and temperature are digitally displayed on the LCD. - Displays results in parts per thousand (ppt), Practical Salinity Units (PSU), or specific gravity (S.G.). - Comes with all the necessary solutions and batteries- everything you need to get started measuring right away. - Ideal for testing salinity in aquariums, field, and industrial settings.