Patent ID: 11933806
Assignee: ENDRESS+HAUSER FLOWTEC AG
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A measuring transducer of a measurement device for registering a mass flow or a density of a medium flowing through at least one measuring tube of the measuring transducer, comprising:
the at least one measuring tube having an inlet and an outlet and adapted to convey the medium between inlet and outlet;
at least one exciter, which is adapted to excite the at least one measuring tube to execute oscillations;
at least two sensors, which are adapted to register deflection of oscillations of at least one measuring tube;
wherein at least one exciter as well as the sensors have, in each case, a coil device with, in each case, at least one coil, as well as, in each case, a magnet apparatus, wherein the magnet apparatuses are movable relative to their coil devices, and
wherein the magnet apparatus and the coil device of an exciter, or sensor, interact with one another by means of magnetic fields,
wherein the coil device has a circuit board with at least one circuit board layer, wherein the coil is arranged on or in at least one circuit board layer, wherein the circuit board has a first coefficient of thermal expansion,
wherein the measuring transducer has a support body, which is adapted to hold the measuring tube,
wherein at least one coil device of the sensors or the coil device of the exciter are/is secured using a holder apparatus to the support body or to a measuring tube, wherein the holder apparatus is adapted to clamp the circuit board, in order to hold the circuit board using lateral frictional interlocking, wherein the circuit board is mechanically contacted by the holder apparatus by means of at least one holder element of the holder apparatus, wherein the holder element has a second coefficient of thermal expansion,, wherein the first coefficient of thermal expansion and the second coefficient of thermal expansion differ from one another by less than 3*10−6/Kelvin;
wherein the circuit board is produced by a sintering process, wherein the circuit board comprises a ceramic material, and wherein the ceramic material is a low temperature cofired ceramic;
wherein the holder element comprises at least one of the following materials: zirconium titanium, tantalum.