Description: - RHS-28ATC Salinity Refractometer is designed for testing the concentration of prepared food solution,used mainly in food industry.Such as seafood curing food,pickles, etc. Its scale enables the direct determination of salinity in water that contains dissolved salt and little or no other dissolved solids - It"s FULLY EQUIPPED with ATC(Automatic Temperature Compensation) that automatically adjust itself to correct temperature discrepancies during use. Capable of measuring with high accuracy and provides precise results. It"s equipped with vivid and sharp reticle chart for easy and comfortable reading. Specifications: - Measuring Range:Salinity: 0-280 ppt(0-28%) of NaCl - Minimum Division: Salinity: 2 ppt(0.2%) - Accuracy: ±2 ppt(0.2%) - Reference Temperature: 20°C - ATC(Automatic Temperature Compensation) Compensation Range: 10°C~30°C (50°F~86°F) - Manual calibration with mini-screw driver provided - Weight: 165g Package Included: - Portable Refractometer - Mini Screw Driver - Suction tube - Soft protective carrying case - English User Manual