Hand-held Refractometer Type MASTER-TA Scale Brix 0.0-40.0% and Titre Alcoometrique (TA) 0.0-25.0%: Accuracy: Brix +/-0.5% TA +/-0.3%. Automatic Temp. Compensation (ATC) 10-30 C Water Resistant (IP65). Calibrate w/water. Sleek design w/improved optics for