DR201 Digital Salt Refractometer Salinity Specific Gravity Meter 0~28% Refractometer Food Salt Content Tester Sodium Chloride NaCl, DR201feature The device is standardized and accurate and easy to read. Digital displays are fast and easy to read. Product specifications 1. Apply sugar Sodium chloride NaCl salinity salinity proportion Refractive index 2. Measurement range: Salinity: 0. 0~28. 0% Salinity: 0~280 Proportion: 1. 000~1. 217 Refractive index: 1. 3330 1. 4200nD 3. Salt absorption Salinity: 0. 1% Salinity: 1 Specific gravity: 0. 001 Refractive index: 0. 0001nD 4. Accuracy