Instrument manufacturer / supplier in China, offering DH-300K DahoMeter Gold Purity Test Instrument, Gold and Platinum Density Tester Machine, DE-120K DahoMeter 2 Years Warranty Electronic Digital Precious Metal Tester, Gold Densimeter, Gold And Silver Testing Machine, DE-120K Digital Electronic Gold Purity Densitometer, Gold Platinum Tester, Gold Karat Tester With Printer and so on.