Elevate your precious metal authentication process with the Sigma Metalytics Precious Metal Verifier With External Bridge, SM2701-Ex, a professional-grade device engineered to deliver rapid, non-destructive testing of gold, silver, platinum, palladium, and other precious metals. This advanced verifier ensures the authenticity of coins, bars, and rounds by measuring their resistivity and comparing it to known values for genuine metals—without the need for cutting, scratching, or acid testing. The included External Bridge extends the system’s testing capability, allowing accurate verification of larger bullion bars, sealed coins, and items in assay packaging. This makes it ideal for both retail and industrial applications, offering precise results even for metals encased in protective covers. Featuring a high-resolution display and intuitive user interface, the SM2701-Ex provides immediate visual feedback on the purity and metal type, ensuring that users can confirm authenticity with confidence. It supports multiple wand attachments for different sample sizes, enhancing flexibility in testing a wide range of bullion and jewelry pieces. Built for reliability and ease of use, this verifier is a trusted solution for mints, refineries, jewelry stores, pawn shops, and professional investors who demand fast and accurate results. Compact and portable, it delivers laboratory-level accuracy right at your workstation or retail counter.

Specific Gravity Testing

Put the calipers away. Using known metal densities and an automatic thickness measurement, the PRO takes the entered weight and calculates the expected size of your sample. Simply compare your coin or bar to the displayed size to ensure your piece is legitimate

The PRO's External Bridge provides one-of-a-kind thru readings on bars up to 45mm thick. 1kg and 100 oz silver bars can be quickly and easily checked for authenticity, including thru readings and a specific gravity test. Even your largest purchases are safe

The PRO uses the same Sigma Metalytics technology trusted by thousands of customers, which means it has the same top-tier accuracy of our other devices, can read through plastic and carboard cases and slabs, uses no chemicals or wet testing, and comes with the Sigma Metalytics Gold Standard Promise

The "Pure Silver" range is calibrated to put 99.99% silver samples in the green range and 99.9% silver in the yellow on the right. Sigma Metalytics calibrate the devices this way due to the number of counterfeit 99.9% coins in circulation. The yellow range is a caution sign to remind users to check the other aspects of their sample (dimensions, weight, and markings)

If your bar or coin is the correct size and weight, has the correct markings, is not magnetic, and reads within the yellow or green range, then it is likely genuine

Note:

All External Bridges must be calibrated to their specific parent unit by our engineers at the factory. Paired External Bridges and PRO units will have matching serial numbers

Note:

None of our devices are designed for testing jewelry of any kind. This PMV cannot test jewelry and is only recommended for testing coins and bars