The hand-held refractometer is utilized for instant determination of Refractive Index (RI) of liquids or the concentration of solutions. This portable device has a low cost. Eclipse refractometers are available in a variety of scales and can be utilized in numerous applications across several types of industry. These quality instruments are produced using the most advanced manufacturing methods and materials combined with a thorough knowledge of customer needs. Thus B+S has brought out an exceptional product at an extremely cost-effective rate. The Eclipse has an attractive yet functional design. Every refractometer comes in its own soft carrying case with the instructions included.