Handheld Digital Refractometer - 0-55%This compact digital brix refractometer is a high precision optical instrument that uses its own LED light source to measure brix and refractive index. Displays brix%, refractive index and temperature simultaneously. This compact digital brix meter is a high precision optical instrument that uses its own LED light source to measure brix and refractive index. The device uses the principle that different liquids have different refractive indices, and