professional tool able to determine if coffee extraction occurs in an optimal manner it measures the percentage of solid substances melted in a liquid. An APP is available to purchase to make the most of its potentials and archive the stored data scales: BRIX 0.00ч25.00% resolution 0.01% TDS 0.00ч22.00% resolution 0.01% automatic temperature compensation reponse timeE: 3 seconds protection level IP65 dimensions 105x50x30 mm