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★Upper and lower polarizers: 49mm large-diameter polarizer, removable structure. The upper polarizer is free to rotate 360°, the stage is free to rotate 360°, and the lower polarizer is fixed; ★Light source: Long-life white LED cold light source, which is more conducive to protecting the polarizer; ★Power supply: Equipped with an integrated global wide-voltage power supply, it can work normally within the voltage range of 100--240V, and the brightness is stable; ★Accessories: Equipped with 10mm observe Interference ball; ★Power: 1W;

★High hardness Synthetic CZ test prism. ★Scale range:1.35-1.85.Accuracy: ≦±0.003 ★Professional optical design, Clear Shadow edge,Aluminum alloy table and Internally installed the monochromatic light(wavelength:589.5nm) ★There are two ways of inputing the voltage:2xAAA batteries and DC3V 50mA direct current suply(AC100—240V). ★Equipped with a polarizer and 2ml refractive index liquid(1.78±0.005) with glass bottle. ★Eyepiece: 32mm in diameter, with magnifying function; Test conditions: Temperature: room temperature 5-35°C, humidity: ≤75%, no acid, alkali and other corrosive gases in the room;

1. Detection method: reflection method, both loose stones and mounted diamonds can be detected; 2. Result output: the indicator light directly displays the test result; 3. Pass rate: The pass rate of natural diamonds is not less than 99%; 4. Power supply: TYPE-C interface, DC5V3A adapter or power bank; 5. Operation mode: one-key touch screen, results in 3s; 6. Product size: 220mm*160mm*95mm; 7. Sample size: 2mm-10mm; 8. Product weight: 1.7kg.

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