The BL-01 system for evaluating must (crushed grapes) on delivery, directly measures the characteristic parameters on the transfer line between the grape crusher and the fermenter. The application of this system can be executed when crushing is performed batch by batch. The system can be configured to analyze 1 to 4 lines. The parameter detected by the BL-01 is the degrees Brix value. The measurement is made using a UR-24 refractometer installed on the main piping downline from the crusher, which then transmits the measured values to a control console (PC) connected via a RS485/USB converter. The system is made up of: - Between 1 - 4 refractometer units to detect the °Brix of the must. - Between 1 - 4 connector fittings to be installed on the main pipe (diameter 80 or 100 DIN). - An interconnection box. - A control console which receives the data sent by the refractometric units and then processes and stores it in a special database and transmits it to the Central Computer. - The control console is usually installed on a platform or box on which a trained operator works, managing between one to four crushing lines in the manner indicated in the Operating Cycle described below. The system can be competed with a pH measurement.