Abstract: This comprises a single V-shaped tube (1) bent in a plane and having an inlet section (11), an outlet section (12), an inlet bend (13), an outlet bend; (14, a vertex bend, (15) and a respective tube section (16, 17) between the inlet bent and the outlet bent. Therefore, the distance between the vertex of the vertex bend and the inlet/outlet axis can be practically arbitrarily great; nevertheless, a high measurement accuracy, e.g., an accuracy of the order of ±0.5%, is attainable. Two clamping bodies (2, 3) are clamped onto the tube sections for defining a measuring length forming a tube section of the measuring tube. A respective flat body (31, 32) is fixed onto the clamping bodies (2, 3a).

Abstract: This mass flow/density sensor (10), which can be installed in a pipe and through which a fluid to be measured flows during operation, is to be balanced over a wide density range, so that accurate measurements are possible. A single straight measuring tube (13) having a longitudinal axis (131) extends between its inlet end (11) and the outlet end (12) and is fixed to a support, e.g., a cylindrical tube (14, 14'). The support has a longitudinal centroidal line (141) which is parallel to, but does not coincide with, the longitudinal axis (131) of the measuring tube. A cantilever (15) is fixed to the measuring tube (13) midway between the inlet and outlet ends (11, 12) and in operation causes the measuring tube to vibrate either in a first fundamental flexural mode or in a second fundamental flexural mode having a higher frequency than this first mode. An excitation arrangement (16) disposed midway between the end pieces excites the measuring tube (13) in the second mode.

Abstract: This Coriolis mass flow sensor (40, 50, 60, 70) can be inserted in a pipeline by means of an inlet-side and an outlet-side connecting element (402, 403; 502, 503; 602, 603; 702, 703). An oscillating system comprises at least one measuring tube (401; 501; 601; 701, 701'), through which a fluid to be measured flows in operation. The oscillations of the oscillating system are excited by means of an electromagnetic exciter arrangement (1, 2, 3, 4, 10) which has at least one low-resistance exciter coil (15; 251, 252; 35) fed from an exciter current source (6, 7), a core (13, 23, 33, 43, 53) containing a permanent magnet (12; 221, 222; 32; 42; 512, 522), and an armature (14, 24, 34, 44, 54, 104). The oscillating system can also be excited by interference vibrations which contain a frequency which is the same as the resonant frequency of the oscillating system, such that the measurement result is corrupted.

Abstract: A Coriolis-type mass flow meter is disclosed which can be installed, e.g., via flanges, in a conduit of a given diameter so as to be axially aligned with said conduit, which is traversed by a fluid to be measured. To further improve and optimize its insensitivity to vibrations originating from the conduit, this Coriolis-type mass flow meter comprises: at least one measuring tube fixed to the flanges; a support tube having its ends fixed to the respective flanges; means for exciting the measuring tube into resonance vibrations; velocity sensors positioned along the measuring tube for sensing the vibrations of the measuring tube; acceleration sensors positioned on the support tube along a line of intersection with that plane in which Coriolis forces act; and means which process signals from the velocity sensors and signals from the acceleration sensors into a mass flow signal which is substantially free from interference.

Abstract: This mass flow sensor is to be fitted with two straight tubes, but conventionally needed manifolds are to be dispensed with. The sensor can be installed, by flanges, in a conduit of a given diameter so as to be axially aligned with the conduit, through which flows a fluid to be measured. It has a straight measuring tube, which extends between the flanges and is traversed by the fluid, and a straight dummy tube, which extends parallel to the measuring tube and is not traversed by the fluid. Also provided are a nodal plate on the inlet side and a nodal plate on the outlet side, one of which fixes the inlet-side end portion of the measuring tube to the corresponding end portion of the dummy tube, and the other of which fixes the outlet-side end portion of the measuring tube to the corresponding end portion of the dummy tube, such that the measuring tube and the dummy tube are arranged side by side. A support tube has its ends fixed to the respective flanges.