Quick, Money Saving Testing
Fischer's SigmaScope Gold product line can determine the conductivity of a sample with unmatched precision. The instruments work non-destructively and utilize the eddy current method according to ASTM E 1004. There are two models: The SigmaScope Gold C and the SigmaScope Gold B. Each can reliably determine the electrical conductivity of coins and gold bars within seconds and can positively identify counterfeits. With the increase in the price of gold, fraudulent alloys increase as well, which can lead to considerable monetary losses. The only way to rule out such risks is to test the items using trusted analytical methods. Only non-destructive methods should be used for material testing valuables made of precious metals that can identify the alloy and the precious metal content and detect ignoble inclusions and forgeries.
The electrical conductivity of gold bullion and of all common coins is known. Counterfeits have inclusions on the inside made, for example of tungsten. These inclusions change the electrical conductivity significantly, therefore, using a comparative measurement of electrical conductivity allows for reliable quick and non-destructive identification of counterfeits.