Description 1. A5-SDD is a kind of X-ray fluorescence spectrum precious metal tester, which is based on years of precious metal detection technology and experience, and is independently developed and produced by CFAN Instrument company. 2. It is equipped with imported top SDD detector, all element detection, computer-integrated and aeronautical design, High-end appearance, which owns more than 10 research and development patents, outstanding performance, cost-effective! 3. Our standard is in line with the new national standard GB18043-2013, can be accurate detection of gold and silver jewelry.