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The Presidium Gem Computer Gauge (PCGC) delivers professional-grade gemstone measurement, weight estimation, and identification in a single bench instrument. Measuring to an accuracy of 0.01mm — ten times the precision of a standard analog dial-style gauge — it is indispensable for diamond handlers, gemologists, and appraisers who need to measure, sort, and match loose or set stones with confidence.
The gauge operates as a fully standalone tool: enter measurements directly via the onboard keypad to estimate gemstone weights and identify unknown stones. For expanded capability, connect the PCGC to a Windows-based PC via the included USB cable and use the full software suite loaded on the included mini CD-ROM. The CD adds data for an additional 59 gemstones beyond the 74 built into the gauge, bringing the total to 133 gemstones across 9 shapes. The software also enables advanced data manipulation, storage, and the ability to create weight estimation profiles for custom gemstone types.
Additional functions include a Specific Gravity Dictionary for retrieving the S.G. value of any stored gemstone by name, a Gemstone Estimator that identifies unknown stones from entered measurements and weight, and a direct carat conversion function for round brilliant cut diamonds. The Auto-Magnetic Power-Off feature activates automatically when the gauge is placed in its carrying case, preserving battery life.
| Measurement Resolution | 0.01mm |
|---|---|
| Gemstones in Gauge Software | 74 |
| Gemstones via CD-ROM | 133 total (59 additional) |
| Supported Shapes | 9 |
| PC Compatibility | Windows 2000 and later |
| Interface | USB |
| Power Source | CR-2450 battery |
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