A standard and accurate model of Abbe Refractometer for measurement of refractive index in the range 1.3 to 1.7 with an accuracy of 0.001 direct on scale and 0.0001 by estimation, Sugar percentage range of 0 to 95% with an accuracy of 1% on scale and 0.1 by estimation can be measured. Easily estimated to the fourth decimal place complete in wooden box.AJANTA