Portable digital refractometers are measuring instruments with which anyone can measure the concentration of an aqueous solution, e.g. soft drink, fruit juices, jam,honey,steak sauce,canned goods,milk and lactic acid beverages,machine-cutting oils,quenching oil ,etc. DIOPT Technology Co. is a manufacturer of portable digital refractometers.We are proud to making refractometers useful instruments that are easy for people. Featuring:  Simplicity of operation  Fast,accurate and reliable performance  Automatic temperature compensation  Digital readout of refractive index, Brix and sample temperature.  Only a small volume sample needed.  Low power cost