... instrument for testing purity of precious NAP-7800 Precision Metal Tester Size and Weight: 500*500*400mm/MAX:48KgTest time: 30 ... ,Ag ,pt ,Pd,Rh ,Ru ,Cu,Zn ,Ni,Cd,In(Gold,Silver,Platinum,Palladium,Rhodium,Ruthenium,Zinc,Nickel,Cadmium,Copper,Indium ... , Temperature control system can protect themselves NAP-7800 Precision Metal Tester