Gold and Silver Purity Testing Scanner with Bullion Wands | Sigma Metalytics


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Test the purity of gold and silver coins and bars with the Sigma Metalytics advanced precious metal scanning machine to detect fake or counterfeit coins.

Have you tested the purity of your gold and silver coins? With the Precious Metal Testing Scanner from Sigma Metalytics, you can instantly verify that the coins you own or are interested in purchasing are as pure as advertised. With both the number and quality of fake gold and silver surfacing on the market increasing, the ability to verify the authenticity and purity of your physical gold and silver investments with the exact same device used by the experts at SD Bullion is essential.

This gold and silver testing and detection scanner is used to measure the bulk metal in a bullion bar or coin and ensure that the metal matches the electrical characteristics that would be expected of it.

The testing scanner can assess a sample in less than one second without affecting the coin or bullion in any way. No chemicals are used and no physical damage is done to the coin or bullion being tested. Unlike in other testing methods, plating and surface features do not significantly impact the unit's ability to measure the underlying metal. Using electromagnetic waves that penetrate deeply into the coin or bar, plating and surface features are largely ignored, and the main body of metal assessed. The testing scanner can see through plastic cases and bags, so numismatic coins do not need to be removed from protective holders.

Different sized sensors are used for different sized samples. The biggest sensor is in the main housing and is used for large samples, like 1-ounce coins and bars. To measure smaller objects one of two external wands is connected to the main unit via a cable. The large wand is used for coins weighing between ¼ and 1 ounce. The small wand can be used for smaller samples, such as 1-gram bars and CombiBars, 1/10-ounce coins, and the like. We now offer a new Bullion Wand as an option which is included with this purchase. This new wand will penetrate the surface of gold and silver bars to a depth of 2 mm (.08 in).

The user selects the metal that the sample is expected to be. The testing scanner sets the value of that metal’s resistivity to the center of the bar display. The bar display has brackets that show the expected range of the reading for the selected metal. So, for example, if the user selects pure gold as the metal, and pure gold is placed on the sensor, a value within the brackets will be obtained. Virtually any other metal with a similar weight will fall far outside this range. If the actual reading does not correspond to the expected reading, an arrow will show up on the bar display.

Many standard metals are stored in the Precious Metal Testing Scanner and can be selected by the user. For example, for gold coins the user can select pure gold, 22 K gold, 90% gold, or American eagle gold; for silver, pure silver, sterling silver, 90% silver. and Britannia silver. Pure platinum, palladium, rhodium, and copper also have stored values. Each of these coin and bullion metals will produce a unique reading on the Precious Metal Testing Scanner. Even small changes in alloy make a big difference in the readings on the Precious Metal Testing Scanner.

The Precious Metal Testing Scanner has many advantages:

  1. Can be used with any metal.
  2. Reads the metal bulk—not coatings and plating.
  3. Can read through packaging.
  4. Very fast—1 second results.
  5. No wet chemistry, no consumables, no scraping or filing.
  6. Inexpensive to buy and use.
  7. Detects and prevents precious metal fraud.
  8. Can assist in determining numismatic authenticity.
  9. Easy to use, easy to program for additional sample types.
  10. Portable—long battery life.
  11. Durable—no maintenance required.
  12. NEW BULLION Wand increases the depth of measurement by a factor of four.

The three wand attachments are able to detect a multitude of pre-programmed metal contents including:

  • Gold - Pure
  • Gold - 91.7% 22K Crown
  • Gold - 90%
  • Gold - American Eagle
  • Gold - 98.6%
  • Silver - 99.99% Pure
  • Silver - 99.9% Pure
  • Silver - 92.5% Sterling
  • Silver - Morgan Dollar
  • Silver - Peace Dollar
  • Silver - 90% Coin
  • Silver - 96% Britannia
  • Platinum
  • Palladium
  • Rhodium
  • Copper


  • 3 Attachment Wands
  • Carrying Case
  • Instructional Manual
  • USB Cable
  • Charger

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