The industry’s only easy-to-use analog gauge for measuring gemstone dimensions with direct conversion to carat weight for round brilliant-cut diamonds.
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
Power & Battery
No batteries needed.
This product comes with a protective carrying case box.
Dimensions & Weight
Length: 97mm (3.82 inches)
Width: 61mm (2.40 inches)
Height:16mm (0.63 inches)
Weight (without batteries): 100grams (3.52oz)