... .Display: gram, gold K, %, specific gravity 4.Multiple weighing X-ray Precision metal tester (NAP7800) Precision metal tester Detailed Product Description1 ... ,Pd,Rh ,Ru ,Cu,etc 4.0.001,X-ray ligh 0.001g X-ray light Computer Screen Spectrometer for 1%-99.99% NAP7800 ... after several repeated test)High Pressure Template:4~50Kv X-Ray Source: Mo Material X-ray light tube( Wind Cool, No radiation) Max. Power ...