Vee Gee Scientific BTX-1 Handheld Refractometer, with Brix Scale, 0-32%, +/-0.2% Accuracy, 0.2% Resolution, 10 to 30 degree C ATCHandheld portable refractometer for Brix (0. 0 to 32. 0%) measurement of sugar content in fruit, juices, soft drinks, coffee and cocoa beverages, lactic beverages, purees, soups, industrial fluids, water soluble detergents, and aqueous film forming foams (AFFF) for fire fighting in a 10 to 30 degrees C temperature range Automatic temperature compensation (ATC) for immediate and accurate calibration readings, regardless of ambient temperature Ambient