Refractometer Brix Range 0 Percent to 18 Percent Brix Automatic Temperature Compensation Yes Accuracy +/-0.15 Percent Resolution 0.1 Percent Function Measures the Concentration of An Aqueous Solution By Measuring Its Refractive Index Specific Gravity 1.000 to 1.070 Features All Metal Housing Calibration Screw Glass Prism Non Roll Stand Rubber Eye Cup Rubber Grip Scale 1 Percent to 20 Percent Scale Display Single Hinged Daylight Plate Length 8 1/2 in Width 1 1/2 in