Gold APP Instruments China produces analyzers cover flow gas adsorption principle BET surface area analyzers,volumetric adsorption principle surface area and pore size analyzers,high pressure and temperature gas adsorption analyzers and helium gas pycnometer true density analyzer. Also with many lab parts like platinum/Pt crucible, gold/Au crucible, nickel crucible, platinum-gold alloy crucible, platinum/gold dish and plates, pure platinum/iridium/gold/platinum rhodium/platinum iridium wires and plates.