The Atago’s RX-α series offers automatic digital high-precision refractometers. The series includes Automatic Digital Refractometer RX-5000α -Plus – the most accurate refractometer in the world with 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-α series refractometers come with a warranty period of even 3 years.