Keyray Instrument Inc is one high-tech enterprise that specializes in researching, developing and producing X-ray fluorescence Spectrometer, precious metals analyzers, environmental protection tester, mineral products detector,antique analyzer and handheld element analyzer, etc. All X-ray fluorescence Spectrometer instruments that Keyray Instrument Inc. produces have achieved the certifications of international authoritative testing institutions, such as European Union CE certification, American FCC certification, European Union ROHS certification etc. Products are exported to Europe, America and Southeast Asia and other countries and regions, recording annual sales of more than 1,000 units. Domestic numerous jewelry jade quality appraisal center, large jewelry manufacturers and jewelry retailers, all of them have chose Keyray gold tester:Zijin Mining Group Co., Ltd, China university of geosciences jewelry testing center, Multigold Co., Ltd( Gome Electrical Group), Shenzhen Tonghui Jewelry Co., Ltd, Shenzhen Guojin Gold Co., Ltd etc. We use top European testing instrument production technology, under the leadership of the R&D team in Hong Kong, we forge ahead with determination, continuous innovation, continuously developing the world's top analysis instrument.