A standard and accurate model of Abbe Refractometer for measurement of refractive index, dispersion and sugar concentration, scale reading upto third decimal, but can be easily estimated to the fourth decimal place complete in wooden box.
Measurung Range : nD 1.3000 to nD 1.7000
Accuracy : 0.0001
Sugar percentage : 0 to 95% in steps of 1 div.
Dispersion : nD 0.0005