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. The OE models come with Automatic Temperature Compensation function (ATC) and Water Resistant feature (IP65).The POE model is manuel for ATC and they are made of plastic.