Measuring, controlling, regulating, signalling, checking and recording devices, apparatus and instruments and related software (included in this class); physical, electrical, electronic, electromagnetic, electromechanical, optical, acoustic, particle radiation, ultrasound, hydrostatic and mechanical apparatus for measuring, controlling, regulating and checking as well as related computer programs, in particular for determining and monitoring of process pressures and for determining and monitoring the filling level in containers; capacitive, hydrostatic, pulse echo, light optical and laser, electromechanical, particle radiation, vibration and conductivity and microwave instruments and apparatus for measuring a given filling level as well as associated evaluation, display and protection devices, apparatus and instruments, parts of such devices, apparatus and instruments; computer programs for operating such devices, apparatus and instruments (all the aforesaid goods included in this class); computer programs, included in this class