Online Aerosol Mass Spectrometer Series SPAMS 05 SPAMS integrated the international latest technology of sampling, sizing and mass detection in vacuum condition, which realized the synchronous detection of chemical composition and sizing of single particle aerosol. The SPAMS opens up a new aerosol research direction and is a powerful and presice3 testing and analytical tool. This instrument was financially supported from National 863 Program, and was selected into the exhibition of national key products of science & technnology during the Eleventh Five-Year Plan Period. SPAMS was awarded as to one of the outstanding new products of Chinese scientific instruments in 2010.