The operator can simply apply a drop of sample on the prism to view the measurement value through the eyepiece. 5 models are available. These models come with dual scales (one wine scale plus Brix scale). These models are equipped with the same great features as the other MASTER-α Series. Featuring functions, such as, Easy-to-Read, Easy-to-Hold, Smooth Sampling, Easy Disposal of Sample, Well-Balanced Structure, and the improvement of hygiene aspect by employing the new type of grip. KMW models come with Automatic Temperature Compensation function (ATC) and Water Resistant feature (IP65).P/KMW models have same properties, but manuel for ATC, made of plastic.