Abbe refractometer - BGD 250/251

A refractometer measures the extent to which light is bent i.e. refracted when it moves from air into a sample and is typically used to determine the index of refraction aka refractive index or n of a liquid sample.

The refractive index is a unit-less number, between 1.3000 and 1.7000 for most compounds, and is normally determined to five digit precision. Since the index of refraction depends on both the temperature of the sample and the wavelength of light used these are both indicated when reporting the refractive index

n_D²⁰1.3742

The italicized n denotes refractive index, the superscript indicates the temperature in degrees Celsius, and the subscript denotes the wavelength of light in this case the D indicates the sodium D line at 589 nm.
The refractive index is commonly determined as part of the characterization of liquid samples, in much the same way that melting points are routinely obtained to characterize solid compounds. It is also commonly used to
*Help identify or confirm the identity of a sample by comparing its refractive index to known values.

*Assess the purity of a sample by comparing its refractive index to the value for the pure substance.

*Determine the concentration of a solute in a solution by comparing the solution's refractive index to a standard curve

Main technical parameter

1.Measuring range of refractive index: ND 1.300-1.700

2.Measuring precision of refractive index: ND 0.0002

3.Min-division value of refractive index : 0.0005

4.Measuring range of sugar consistence : 0-95

5.Min-division value of sugar consistence: 0.25

6.Weight: 2.6KG

7.Size: 200mm×100mm×240mm

Ordering information: BGD 250--- Monocular Abbe Refractormeter

BGD 251--- Binocular Abbe Refractormeter