Presidium Duo Tester (PDT) is the only comprehensive tool on the market that combines two proven testing methods for gemstones. PDT differentiates
diamonds from its simulants based on both their thermal conductivity and reflective indexes. Coated gemstones can also be generally tested with the PDT.
The Presidium Duo Tester comes with a probe pen that has a retractable probe tip which ensures consistent pressure against the gemstone during testing for more reliable results. With the industry’s thinnest probe tip size of 0.6mm, PDT tests gemstones as small as 0.02ct.
*Does not differentiate between natural and synthetic colored gemstones.
Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone
Industry’s thinnest probe tip (0.6mm) for testing gemstones as small as 0.02ct
Metal alert buzzer to ensure that the probe tip is in contact with gemstone during testing
Large easy-to-read analog dial with 15 colored gemstones
Digital index LED display for reading reflectivity value of the gemstone (based on a conversion from the refractive index)
Built-in diamond and simulant test discs for reference