Next day delivery

available on over 15,000 products

30 day returns

Secure card payment

with Nice Payments

Presidium Dial Gauge (PDG) - TG7

Brand: Presidium

Subtotal: £194.95 Price: £194.95 + VAT if applicable
Quantity discounts 1 (£194.95) 2+ (£185.20) 10+ (£175.46)

SKU: TG7 Packaged weight: 0.30kg

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 provided0
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.
Dimensions & Weight
Length: 97mm (3.82 inches)
Width: 61mm (2.40 inches)
Height:16mm (0.63 inches)

This product comes with a protective carrying case box.