Presidium gemstone dial gauge (PDG)

The gauge instantly measures round diamonds and gemstones in carats.
The gauge displays an easy-to-read scale in mm and in carats, precise to 0.1 mm. It also shows the American ring size scale.

Specifications:

• Measuring ranges: 0 to 23 mm / 0.01 to 3.65 ct / 2 to 13 ring sizes
• Precision: 0.1 mm / Tolerance: 0.02 mm with simple zero realignment
• Analogue gauge with mm/ct/ring size display
• Patented anvil
• Smooth slider mechanism
• Portable and lightweight
• Supplied with attachment for set jewellery, gemstone weight estimation table, instruction manual, guarantee card and protective case
• Weight: 100 g