Presidium Duotester Diamond Tester

Elevate your gemstone authentication with the Presidium Duo Tester II (PDT II). As the only comprehensive desktop tool on the market combining two proven testing methods—thermal conductivity and light reflectivity—this instrument provides double the confidence when separating diamonds from simulants. Equipped with the innovative Assisted Thermal Calibration (ATC) function, the PDT II guarantees accurate and consistent results whether you are operating in a climate-controlled laboratory or out in the field.

Key Features & Benefits

• Dual Testing Technology: Cross-reference your results. This device tests both thermal properties (via the probe) and reflective indexes, making it highly effective at identifying diamonds, simulants, and even generally detecting surface-coated gemstones.

• Assisted Thermal Calibration (ATC): Features built-in Glass and Calibration (CAL) discs. This ensures your tester is always perfectly calibrated to the surrounding environment for flawless accuracy.

• Ultra-Fine 0.6mm Probe: The retractable thermoelectric probe tip ensures constant, perfect pressure against the stone. With the industry's thinnest 0.6mm tip, you can confidently test diamonds and gemstones as small as 0.02ct.

• Clear Dual Displays: Features a large, easy-to-read analog dial for thermal results (covering 16 colored gemstones) alongside a bright digital LED display for reflectivity values.

• Built-in Safety Alerts: A metal alert buzzer ensures the probe tip is in contact with the actual gemstone and not the jewelry setting, preventing false readings.