Low-range pocket salinity tester, 1 to 3 points calibration, setup menu contains 5 options, suitable for measuring natural water and low salinity liquids, range 0 to 10 ppt.
High-range pocket salinity tester, 1 to 3 points calibration, setup menu contains 5 options, suitable for measuring seawater and high salinity liquids, range 0 to 80 ppt.