Coriolis mass flow measuring device and/or density measuring device

At least one of a coriolis mass flow measuring device or density measuring device, comprising:

• at least two bent measuring tubes;
• said
• measuring tubes have measuring tube axes, which extend mirror symmetrically to a first mirror plane, which extends between said measuring tubes;
• at least one actuator arrangement;
• at least one sensor arrangement;
• a collector situated at the inlet end and at the outlet end, said measuring tubes are joined inlet end and outlet end with said collectors, wherein the inlet end and outlet end collectors are embodied stably in such a manner that each fulfills the functionality of a node plate;
• a support body, which connects the inlet end collector and the outlet end collector rigidly with one another;
• and
• at least one, plate-shaped couplers situated at the inlet end and the outlet end of each measuring tube, wherein:
• said measuring tubes are connected by means of said couplers pairwise with one another, in order to form an oscillator, said couplers have, in each case, two tube openings for said measuring tubes connected by said couplers, through which openings said measuring tubes are led, said measuring tubes are connected along their peripheries at least sectionally with said couplers;
• said at least one actuator arrangement is adapted to excite a bending oscillation wanted mode between said two measuring tubes of the oscillator,
• said sensor arrangement is adapted to register oscillations of said oscillator;
• and
• at each inlet end and outlet end, at least one coupler has, between said measuring tubes connected by the couplers, a tuning opening surrounded by a closed edge for influencing the oscillation characteristics of the oscillator.