New Extech RF20 0 Parts per Thousand to 100 Parts per Thousand Automatic Temperature Compensation Salinity Refractometer

Salinity refractometer measures the concentration of dissolved salt in water --- Includes: (1) Carrying Case; (1) Calibration screwdriver Measures salinity from 0 to 100ppt Max resolution 1pp Automatic temperature compensation Only require 2 or 3 drops of solution Simple, repeatable measurements