Eclipse Professional Grade Optical Hand Held Refractometer Hand-held refractometers are low-cost, portable instruments used for ‘on the spot’ determination of Refractive Index (RI) of liquids or the concentration of solutions. Offering a choice of scales, Eclipse refractometers can be used in a multitude of applications across many and varied industries. Quality at an affordable price By combining the best available modern manufacturing methods and materials and a good understanding of customer requirements, B+S has achieved a quality instrument at a very competitive price. The Eclipse is both a practical and aesthetically pleasing design. All instruments are supplied a soft carrying case and instructions for use. Special features make measurements easy and reliable simple zero adjust with lock shaded field of view for distinction high precision, clear scale easy-clean prism unique sample ‘dribble’ feature low weight anti-roll supports push-on prism flap