#mass_spectrometer__spectrometer  spectroscope for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion current with an electrometer
  supertype:  #prism_spectroscope__prismspectroscope__spectroscope  an optical instrument for spectrographic analysis
  subtype:  #mass_spectrograph  a mass spectrometer that produces a graphical representation of the mass spectrum

No statement uses or specializes #mass_spectrometer; click here to add one.