Refractometer Ruby Jade Diamond Jewelry Refracto Meter Professional Appraisal Tools with Refracting Oil Light

<p>Features</p><p>Item type: refractometer</p><p>Refractive index range: 1.30-1.81ri</p><p>Minimum scale: 0.01ri</p><p>Error: ± 0.003</p><p>Lighting: external</p><p>Size: 61mm * 130mm * 32mm</p><p>==========</p><p>Measurement Range : 1.30-1.81ri</p><p>Min. Div. : 0.01ri</p><p>Measurement Accuracy : ±0.002</p><p>Size : 61*32*130mm</p><p>Related Products: portable, high-precision refractometer, honey moisture refractometer, reliable saltwater aquarium salinity refractometer, professional lab-grade refractometers, fast digital refractometer with clear display, antifreeze/coolant tester, glycol concentration refractometer</p>

• Refractometer is the most important tool for determination and also the most powerful tool for identifying species.
• It can be used to measure the refractive index of gems without damage, quickly and accurately, and to determine other optical characteristics of gems.
• This refractometer uses high refractive index lead glass as the test prism; Measuring range: 1.30-1.81, accuracy: ± 0.002, power supply device: external battery, 1 * AA, R6.
• Professional optical design and built-in narrow wavelength quasi monochrome LED light source make the shadow boundary ultra straight and clear; The black background high contrast ruler makes the interface clearer.
• It is equipped with 3ml refractive oil (refractive index 1.78), and is packaged with leather cases, which are elegant in appearance.