Noble T7 Optical Emission Spectrometer adopts the international standard of design and manufacturing technology. It uses the most advanced CMOS signal acquisition device from Japan Hamamatsu Co. Each CMOS can set the number of sparks separately. It adopts vacuum light chamber design and full digital excitation light source.. This CMOS Spectrometer is not only contain the feature of full spectrum of CCD spectrometer but also have the advantages of PMT spectrometer which has very low detection limit for nonmetallic elements. The design of the whole machine is reasonable. It also has many advantages such as easy operation, high accuracy test result, long-term stability etc.