Presidium Duo Diamond and Gemstone Tester

Presidium® Duo Tester (PDT) is a premium portable desktop device that utilizes dual thermal and reflectivity tests as well as PRESIDIUM's signature retractable probe tips, which ensures constant pressure between probe and gemstone, to accurately verify diamonds, diamond simulants & synthetics, and coloured gemstones.

METAL-CONTACT ALERT BUZZER ◆ EASY-TO-READ ANALOG DIAL WITH 15 COLORED GEMSTONES ◆ CAN BE USED WITH COATED STONES ◆ DIGITAL INDEX LED DISPLAY ◆ BUILT-IN COMPARISON STONES, TEST DISCS AND REFLECTIVE PROPERTIES CHART ◆ THREE HOURS CONTINUOUS USE ◆ LOW-BATTERY INDICATOR WITH AUTO-SHUTOFF ◆ BATTERY AND AC POWER ◆ ONE-YEAR MANUFACTURER'S WARRANTY

The Presidium Duo Tester PDT is the only Gemmological instrument in the industry that can examine gemstones using both thermal and reflectivity testing. Presidium is a leading manufacturer of high-quality Gemmological instruments and distributes to institutes, laboratories, jewellery manufacturers, diamond appraisal and retail businesses worldwide. This advanced duo tester instantly differentiates diamonds from other simulants with ease. The probe pen features the industries thinnest retractable probe tip (0.6mm) which allows for consistent pressure when set against the stone ensuring reliable results every time. A clear and easy to read analogue dial provides clear results from the 15 listed coloured gemstones whilst the digital LED index display identifies the stones reflectivity value. This portable tester can test stones as small as 0.02ct and will alert you if you've hit metal to ensure accurate results, coated stones can also be generally tested. Other features include built-in; simulant reflective properties chart, simulant and diamond test discs for reference and a metal stone rest. Requires 5 x AAA alkaline batteries. Supplied with a 2-pin plug for alternative power supply. All of the Presidium products are RoHS Compliant with the RoHS regulation as well as 4R Compliant with WEEE regulation. Please note - it will not differentiate between natural and synthetic coloured stones.