This series of hand held refractometers feature functions such as easy-to read, easy-to-hold and the Automatic Sample Distribution (A.S.D.) which is a prism housing design that allows for a sample to cover the prism without having to lift the daylight plate for fast and easy sample measurements and disposals. This series of hand held refractometers feature functions such as easy-to read, easy-to-hold and the Automatic Sample Distribution (A.S.D.) which is a prism housing design that allows for a sample to cover the prism without having to lift the daylight plate for fast and easy sample measurements and disposals.