Presidium Gem Computer Gauge (PGCG) - TG75

An advanced digital computer gauge that measures gemstone dimensions and can estimate gemstone weight and identity for 9 different cuts.

Presidium Gem Computer Gauge measures the dimensions and estimates the weight of loose and mounted gemstones with precision, speed, and ease.
It is the only gauge in the industry that is able to give direct estimation of the weight of various gemstone of a range of 9 popular cuts, giving users the convenience of not having to dismount their gemstones from its jewelry settings.
After entering the weight and the measurements of a gemstone, the Gem Computer Gauge is alternatively also able to be used to estimate the identity of the gemstone, by computing its S.G. value and referencing the internal stored database.
With PGCG’s computer interfacing, gemstone measurement records can be easily imported and printed. PGCG also comes with a CD-Rom that lists the S.G. value, R.I. value, and hardness measurements of 133 common gemstones in the market for handy reference.
You can download the PGCG Software here.
Measures from 0.0 to 25.0mm
Accuracy: 0.01mm / Tolerance: 0.02mm
Digital mm/ct display
Automatically shut off when idle for 10 minutes
Auto-magnetic shut-off when placed in carrying case
Computer interface display with CD and USB (Universal Serial Bus) connectivity
Attachment for high setting jewellery provided
Specific Gravity (S.G.) dictionary for quick and easy reference included
CD-ROM containing information on 133 gemstones (e.g., S.G. value, R.I. value and hardness) included
Can be used to give direct carat conversion on different types of gemstones of a range of 9 different popular cuts
Direct carat conversion for round brilliant-cut diamonds
No need for dismounting of the gemstone to weigh its carat weight
Measures actual gemstone dimensions and estimates gemstone weight and identity
Able to estimate identity of 74 different gemstones
Accurate measurement to 2 decimal places/0.01mm
Clear and visible display for ease of reading measurements
Light and portable instrument that can be used anywhere
PC connectivity for ease of importing and printing measurement results
Power & Battery
1 x 3V battery (NOT INCLUDED)
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 that has an auto-magnetic power off when gauge is placed back in the carrying case, to help preserve battery.
20% VAT£54.64
Quantity discounts: 
Qty12 - 910 - Unlimited
Quantity per unit: 
Packaged weight: 
0.3 kg
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Average: 5 (1 vote)


Prices displayed ex VAT. VAT (@ 20%) only applies to Great Britain & N.Ireland.