Hanna Instruments Marine Salinity Tester (HI98319U)

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. 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.