... the best competitive type based on its precision and price. xrf spectrometer , XRF gold analyzer,X-Ray Precious Metal Tester,Precious Metal Tester ... anti-radiation device. SQ-8800 is equipped with electric devices for opening cover which makes the test easier. Detailed features:Analysis ... elements in 1~3 seconds, operator could set the time for testing the elements in-density.) Test Precision:+/-0.1% ...