Lab Digital Refractometer - SalinityMeasure concentrations in brix, salinity, refractive index and clinical parameters with full scale accuracy of 0. 1% using CCD scanner (linear scanned array imaging) technology. Simple to use. All models calibrate to distilled water and require a sample of only 0. 4 ml. Instantly displays temperature in addition to multiple scales with the unit of measure indicated on the large LCD. The sophisticated microprocessor provides automatic calibration,