Digital Gem Refractometer

Original brand: PRESIDIUM
Model: Refractive Index Meter II

The presidium refractive index meter II is designed to quickly separate diamonds, moissanites, and other colored gemstones based on their refractive index (R.I.). By utilizing universally recognized international measurement standards, the refractive index meter ensures consistent and reliable results when used correctly.

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Our digital gem refractometer offers rapid detection, providing accurate refractive index readings in seconds, enabling the quick separation of diamonds, moissanites, and other gemstones. The refractive index range spans from 1.000 to 3.000 approximately, with continuous detection available without the need to wait. Additionally, the refractometer is powered through a USB port, making it compatible with international voltage standards, and includes a low battery indicator that will automatically turn off to preserve power. It is factory-calibrated, eliminating the need for user calibration and ensuring immediate usability upon setup.

Specifications

Power source: 9V alkaline battery or USB power supply
Calibration: No user calibration required
Recommended operating temperature: 18°C–27°C
Display: Shows results with three decimal places
Dimensions (L×W×H): 135mm × 80mm × 45mm approximately

Notes

The refractometer is calibrated at the factory and should not be recalibrated by users.
Ensure the gemstone is clean and dry before testing.
Do not conduct tests when the “low battery” indicator is on.
Allow the gemstone to reach the appropriate temperature range before testing.
Remove the battery after use to preserve power.