Alpha Mirage Precious Metals Tester/Specific Gravity Meter GK-200 for sale. This is a professional-grade device used to identify materials and authenticate precious metals like gold and platinum by measuring their specific gravity from their weight in air and water. Product Condition * Operation confirmed (verified during photography) * Display, button operation, and measurement functions all work without issue. * As it is a machine, there may be some slight errors. However, accurate values can be obtained by remeasuring. * As a used item, there are some minor scratches and yellowing on the exterior, but there is no damage that affects its use. Main Specifications (as indicated on the unit/general specifications) * Manufacturer: Alpha Mirage * Model Number: GK-200 * Measurement Method: Specific Gravity Measurement * Maximum Weighing Capacity: 200g * Application: Identification of precious metals such as gold and platinum * Power Supply: AC power * Display: Digital display * For professional/store use Included Accessories * Main unit * All items shown in the photos are included. Additional Information This is a standard model used in jewelry stores, pawn shops, and recycling shops. It is currently in low supply and is in high demand in the used market. 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