该仪器外型美观，体积小，操作简便，测定范围大，尤其是解决了普通光学折射仪不能测定高折射率宝石的难题。
GI-RDA digital gem refractometer helps you identify gems with higher refractive indices that ordinary optical refractometer cannot identify.

【主要特点】
● 测定范围大：R.I.=1.30-2.99
● 免油测试，无污染
● 能测试折射率和反射率值，一机两用
● 采用美国微电脑处理器，数字电路设计，不受环境光线影响，数据稳定
● 无需专业培训，结果数字显示，操作简单
● 示值误差：≤±0.008

Key Features
●R.I. =1.30-2.99
●Doesn’t require the use of contact fluid, no pollution, no harmful to operator and sample
●Dual-testing function: gem RI and reflectivity
●Stable results without environmental impact
●Error ≤ ±0.008