Dual Scale Handheld Refractometer - Brix and Specific Gravity (SG) for BrewingThe Dual Scale Refractometer is the ultimate tool for monitoring sugar concentrations in wort or must. Unlike traditional hydrometers, this optical device requires only a few drops of liquid to provide an instant reading of both Brix (0 32%) and Specific Gravity (1. 000 to 1. 130). Features Automatic Temperature Compensation (ATC) to ensure accuracy across varied ambient environments. Calibration Tip: Before each use, calibrate the device using a drop