... : 24Kg XRF Gold Tester(Portable, Model: SQ-2000) XRF gold tester. SQ industry has contributed Gold Tester to Jewelry society more ... and Asia have enjoyed the reliable performance of SQ Gold Tester. SQ-2000 adopts low power X-ray tube, instead ... %, for 24K Jewelry ±0.3%.Powerful software tools: Fundamental parameter, Theoretical coefficients’ and experiment coefficients for quantitative analysis. And ...