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Presidium PDG Dial Gauge

Professional Quality 9-Piece Miniature Screwdriver Set in Rotating Stand + Replacement Blades

Availability: In stock


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Presidium PDG Dial Gauge

The industry’s only easy-to-use analog gauge for measuring gemstone dimensions with direct conversion to carat weight for round brilliant-cut diamonds.

Please see the product user guide for detailed specifications.

Presidium Dial Gauge measures from 0.0 to 23.0mm in 0.1mm divisions. The PDG features an easy-to-read millimeter and carat scale, and is only dial gauge in the industry that combines dual measurements for gemstones in millimeters with corresponding carat conversion for round brilliant-cut gemstones. PDG also contains an inner scale display for US ring size measurements.

The PDG is manufactured to the highest quality and features a patented anvil with a non-metallic lubrication-free rack and pinion technology that resist wear and tear and maintain its accuracy.


Measures from 0.0 to 23.0mm
Accuracy: 0.1mm / Tolerance: 0.02mm with simple zero realignment
Analog gauge with mm/ct/ring size display
Patented anvil
Smooth slider mechanism
Portable and lightweight
Compact protective case included
Attachment for high setting jewelry provided
Presidium Gemstone Weight Estimation Table provided


Instantly converts millimeter readings to carats for round brilliant-cut gemstones
Measures gemstone dimensions with accuracy to 0.01mm
Clear and easy-to-read analog display with readings in mm/ct/ring size
Light and portable instrument that can be used anywhere

Additional Info

Additional Info

Weight 0.5000
Country of Manufacture United States
Color Silver
Material Stainless Steel


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