The EM-Tec CXS-5TX calibration standard includes 5 reference materials and a 200µm aperture copper Faraday cup. All mounted in a compact Ø12.7mm standard aluminium pin stub. The copper Faraday cup and aluminium pin stub can serve as a Cu/Al reference for detector gain/zero calibration. Intended for: setting up EDAX detectors and EDS systems for 1-20KeV.Reference materials: Si, Cr, Fe, Ni and Mo. 200µm copper Faraday cup.