Refratometer: 1. small volume, handheld, portable 2. light-weighted 3. graceful in shape 4. easy to operate Refratometer: 1. small volume, handheld, portable 2. light-weighted 3. graceful in shape 4. easy to operateHand-held Refractometers are precision optical instruments.Through the scales we can easily know the concentration of liquids. hand hold brix refractometer