Mass flow and density meters according to the Coriolis principle with low pressure dependence and method of manufacture

摘要

The invention relates to a Coriolis mass flowmeter (1), comprising a housing (3) with an inlet (31) and with a fluid medium outlet (32) arranged along a flow axis (d), at least one measuring tube (4 formed by the fluid medium in a flow direction (x) and between the inlet (31) and the outlet (32) is arranged, wherein the measuring tube (4) has at least one section with oval cross-section, so that the measuring tube ( 4) in this section perpendicular to the flow direction (x) has a longer axis (a) and a shorter axis (b), a vibration exciter (D) adapted to vibrate the measuring tube (4) in a vibration direction (f) and two vibration sensors (S1, S2) for detecting the movement of the measuring tube, wherein the longer axis (a) of the oval cross-section of the measuring tube (4) is oriented essentially in the direction of oscillation (f). In addition, the invention relates to a method (6) for producing a Coriolis mass flowmeter (1) with low pressure dependence.