This Accuvin Test Kit is designed to measure Titratable Acid for wine, starting with your wine must before fermentation and during the wine making process and aging. Testing to control Titratable Acid in wine to optimize its level is very important as the level of acid in wine is a major contributing factor to the taste of your wine. This test kit measures Tartatic Acid from 4.0to 11.0 g/L and includes 10 tests, 10 samplers and complete instructions.