The RX-i series offers automatic digital high-precision refractometers featuring intuitive touch screen technology, which makes navigation and selection very smooth. It comes with newly added functions, such as USB flash drive and self-diagnosis capability. The series includes Automatic Digital Refractometer RX-5000i-Plus – the most accurate refractometer in the world, with the refractive index range from 1.32420 to 1.58000, accuracy of ±0.00002, and brix range from 0.000 to 100.000% with accuracy of ±0.010%. The RX-i series refractometers come with a warranty period of 3 years.