Coriolis mass flow/density sensor with single straight measuring tube

A Coriolis mass flow sensor for measuring a mass flow rate of a fluid flowing through a pipe, said mass flow sensor comprising:

• a housing having an inlet-end portion and an outlet-end portion axially spaced apart from said inlet-end portion of the housing,
• a flow tube for conducting said fluid,
• said flow tube being fixed in the housing and having an inlet-end section, an outlet-end section axially spaced apart from said inlet-end section, and a measuring section between said inlet-end section and said outlet-end section,
• said inlet-end section of the flow tube extending into said inlet-end portion of the housing and said outlet-end section of the flow tube extending into said outlet-end portion of the housing,
• said measuring section having an inlet-end portion and an outlet-end portion being located on a longitudinal axis of the flow sensor, said inlet-end portion and said outlet-end portion of said measuring section being spaced apart from said inlet-end portion and said outlet-end portion of said housing, respectively;
• an excitation arrangement for vibrating said measuring section;
• a sensor arrangement for detecting vibrations of said measuring section;
• and
• a counterbalance coupled to said inlet-end portion and said outlet-end portion of the measuring section,
• said counterbalance having a centroid spaced apart from said longitudinal axis of the flow sensor extending between said inlet-end portion and said outlet-end portion of the measuring section.

A Coriolis mass flow sensor for measuring a mass flow rate of a fluid flowing through a pipe, said mass flow sensor comprising:

• a housing having an inlet-end portion and an outlet-end portion being axially spaced apart from said inlet-end portion of the housing,
• a measuring tube for conducting said fluid to be measured, said measuring tube being coupled to said inlet-end portion of the housing by means of an inlet-side tube section and to said outlet-end portion of the housing by means of an outlet-side tube section,
• an excitation arrangement for vibrating said measuring section;
• a sensor arrangement for detecting vibrations of said measuring section;
• and
• a counterbalance coupled to an inlet-end portion of the measuring tube and to an outlet-end portion of the measuring tube;
• said inlet-end portion of the measuring tube and said outlet-end portion of the measuring tube being spaced apart from said inlet-end portion of the housing and said outlet-end portion of the housing, respectively, and
• said inlet-end portion of the measuring tube and said outlet-end portion of the measuring tube being located on a longitudinal axis of the flow sensor,
• said counterbalance having a centroid spaced apart from said longitudinal axis extending between said inlet-end portion of the measuring tube and said outlet-end portion of the measuring tube.

A Coriolis mass flow/density sensor which can be installed in a pipe and through which a fluid to be measured flows during operation, comprising;

• a measuring tube having an inlet end and an outlet end;
• a cantilever being fixed to the measuring tube between the inlet end and the outlet end, and
• said measuring tube and said cantilever forming a vibrator having a flexural mode of vibration in which the measuring tube performs flexural vibration and torsional vibration, said torsional vibration being superimposed on said flexural vibration,
• an excitation arrangement for exciting said measuring tube to vibrate in said flexural mode and
• a sensor arrangement for detecting vibrations of said measuring tube.

A Coriolis mass flow/density sensor which can be installed in a pipe and through which a fluid to be measured flows during operation, comprising:

• a housing having an inlet-end portion and an outlet-end portion axially spaced apart from said inlet-end portion of the housing,
• a measuring tube having an inlet end and an outlet end;
• a cantilever being fixed to the measuring tube between the inlet end and the outlet end;
• and
• said measuring tube and said cantilever forming a vibrator having a flexural mode of vibration in which the measuring tube performs flexural vibration and torsional vibration, said torsional vibration being superimposed on said flexural vibration;
• an excitation arrangement for exciting said measuring tube to vibrate in said flexural mode;
• a sensor arrangement for detecting vibrations of said measuring tube;
• and
• a support fixed to the inlet end and the outlet end,
• said support being coupled to said inlet-end portion of the housing by means of an inlet-side tube section and to said outlet-end portion of the housing by means of an outlet-side tube section,
• said inlet-side tube section and said outlet-side tube section being connected with the measuring tube.