Features:

A digital refractometer is an instrument designed using the principle of light reflection. The digital refractometer is designed to quickly measure the refractive index of gemstones, utilizing digital circuits and mature infrared sensor technology. The main chip uses a low-power, high 16 bit digital processor from the United States, with stable performance.

Digital refractometer is currently the best non-destructive method for measuring high refractive index gemstones, solving the problem that traditional Abbe refractometer cannot measure refractive index greater than 1.81. Its measurement range is 1.30-3.00, which is a beneficial supplement to traditional refractometer.

When the test sample meets the following conditions, an ideal result will be obtained: the sample is well polished, the surface of the sample is clean and free of oil stains. Before testing, please clean the sample with alcohol or other substances, and the sample has a flat surface of no less than 3mm.

Specification:

Test range: R.I=1.33-2.99

Accuracy:+/-0.07

Dual use of refractive index and reflectance

Oil free testing, pollution-free.

Power supply: 9V battery

Working environment: 25-28 degrees Celsius

Weight: 1kgs

Packaging size: 55X125X205/mm

Partial refractive index values of gemstones:

Ruby -1.740-1.790

Diamonds -2.3-2.55

Cubic zirconia -2.1-2.2

Wall seal -1.61-1.64

Crystal -1.54-1.56

Emerald -1.56-1.58

Olivine -1.65-1.69

Spinel -1.72-1.73

YAG ------------1.82-1.84

Sapphire -1.740-1.790

Package:

1 X Gem refractometer;  2 X Standard sample;  1 X Clip