Presidium · PGI
Presidium Gem Indicator Colored Gemstone Tester
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Inspection & Measurement
Diamond & Gemstone Tester
KYG1613
Presidium Duo Tester II
Presidium · PDT-II
Comprehensive gemstone tester combining thermal conductivity and reflectivity measurements. Features ATC for precise, consistent indoor or outdoor results.
Inspection & Measurement
Specifications
| Power & Battery | 5 x AA alkaline batteries or AC adaptor (included); approx. 3 hours continuous use on batteries |
|---|---|
| Optimal Operating Temperature | 18 °C – 27 °C (65°F – 80°F) |
| Storage Temperature | 10 °C – 51 °C (50°F – 124°F) |
| Dimensions (L X W X H) | 172 mm x 77 mm x 85 mm (6.77" x 3.03" x 3.34") |
| Weight (Without Batteries) | 260g (9.17 oz) |
| Probe Tip Size | 0.6 mm diameter |
| Smallest Testable Gemstone | 0.02ct |
| Calibration | Assisted Thermal Calibration (ATC), built-in glass/reflectivity test discs, optional diamond simulant set |
| Display | Analog dial with 16 gemstones; digital LED for reflectivity values |
| Usage | Tests diamonds, simulants, general coated gemstones; does not differentiate natural vs. synthetic colored stones |
Overview
Highlights
- Combines dual testing: thermal conductivity and reflectivity for comprehensive gemstone analysis.
- Assisted Thermal Calibration (ATC) ensures accuracy for indoor and outdoor operation.
- Ultra-thin, retractable probe tip (0.6mm) allows testing of tiny gemstones down to 0.02ct.
Applications
- Gemstone identification and diamond differentiation in retail and laboratory environments.
- Testing coated gemstones and simulants with reliable, repeatable results.
- On-site jewelry inspection and appraisal requiring quick, portable, and accurate analysis.
Overview
The Presidium Duo Tester II is a professional tool designed for accurate gemstone identification by integrating both thermal conductivity and reflectivity testing methods. Its proprietary Assisted Thermal Calibration (ATC) ensures that readings remain reliable in diverse environments, delivering dependable results both indoors and outdoors. Featuring an ultra-thin 0.6mm retractable probe tip, it tests gemstones as small as 0.02ct with constant, repeatable pen pressure for improved accuracy.
Ideal for gemologists and jewelers, the Duo Tester II clearly differentiates diamonds from simulants and generally tests coated gemstones. The device offers a user-friendly analog dial, a digital LED display, built-in calibration discs, and operates on either 5 AA batteries or the included AC adaptor. This robust tester is straightforward to use, requires no waiting between tests, and comes equipped with reference charts and built-in features to ensure measurement integrity.
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