Grape Tester for measuring all kinds of index of grapes, that helps the manufacturer to decide the best time to manufacture the grape wine. Model Range Accuracy Wine VWN1 0~ 140 Oe 1 Oe 0~ 25KMW( Babo) 0.2KMW( Babo) 0~ 32% Mas Sacch 0.2% Mas Sacch VWN2 0~ 170 Oe 2 Oe VWN3 30~ 140 Oe 1 Oe 0~ 32% Brix 0.2% Brix VWN4 0~ 140 Oe 1 Oe 0~ 32% Brix 0.2% Brix VWN5 0~ 190 Oe 2 Oe 0~ 38KMW( Babo) 0.5% Brix 0~ 44% Brix 0.5% Brix VWN6 30~ 140 Oe 1 Oe 0~ 25KMW( Babo) 0.2% KMW