Analog Refractometer,0 to 30 Range
2, Features Easy Clean, Low Weight, Push on Prism Flap, Simple Zero Adjust lock, Includes Certificate of Calibration, Foam Carry Case, Instructions Manual, Manufacturers Warranty Length 1 yr.Analog Refractometer, Hand-Held, Range 0 Percent to 30 Percent, Automatic Temperature Compensation No, Resolution 0.