The spectrAA-40G is intended for furnace operation only, using the Techtron Model GTA-96 Graphite Tube Atomizer, and has no provision for gas control. All instruments in the SpectrAA-30/40 series are dependent on the Techtron Data Station Model DS-15 as system controller. Instruments in the SpectrAA-300/400 series are dependent on the IBM PC (Data Station) Model 2/30. Software for Operation of the analysis programs is provided according to the individual System requirements.