This model, the R5000 has a refractive index scale. This refractometer is designed as an instrument with which the refractive indices (nD) of liquids might be measured quickly and easily. It is conveniently carried.

Set "1" , "2" or "3" of the scale range using the knob. The ranges are as follows

• "1" : 1.333 to 1.404 (the scale on the left side)
• "2" : 1.404 to 1.468 (the scale at the center)
• "3" : 1.468 to 1.520 (the scale of the right side)