The gold purity tester Neo 300K uses German imported sensors and converts the precious metal purity by detecting the precious metal density; it is an instrument that quickly distinguishes the true and false of precious metals from the content, without damaging the sample, and can quickly display the percentage of gold purity% and K, Density value, platinum% content, density value, silver purity%, density value,% content and density value of other alloys. Widely used in pawn shops, precious metal recycling, jewelry silver buildings, banking, mining, jewelry manufacturers, jewelry testing centers, industries, gold and precious metal research laboratories and other industries. It conforms to GB / T1423 precious metal purity determination standard. It is currently a widely used detection method. This product does not need to bundle test samples. It can be accurate in only two steps. Precious metals mainly refer to eight metal elements such as gold, silver and platinum group metals (ruthenium, rhodium, palladium, osmium, iridium, platinum). Most of these metals have a beautiful color and are quite resistant to chemicals. They do not easily cause chemical reactions under normal conditions. Precious metals are used to make jewelry and souvenirs, and they have a wide range of industrial or technical uses.