Endress + Hauser Gmbh + Co. Kg

Endress+hauserse+co. Kg

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Endress+hauser Gmbh+co.

Endress+hauser Conducta Gesellschaft Fur Mess- Und Regeltechnik Mbh+co. Kg

Endress + Gmbh + Co. Kg

Thomas Uehlin

Elke Maria Schmidt

Andreas Rossberg

Ulfert Drewes

Michael Hugel

Sergej Lopatin

Frank Hegner

Nils Ponath

Igor Getman

Michael Hügel

Karl Flögel

Olaf Textor

Benjamin Mack

Karlheinz Banholzer

Karl Fl&ouml;gel

Rainer Martin

Andrea Berlinger

Elmar Wosnitza

Dietmar Spanke

Detlev Wittmer

Marc Baret

Christof Huber

Torsten Pechstein

Peter Gerst

Joachim Albert

Hansjörg Brock

Anh Tuan Tham

Peter Klofer

Benjamin Lemke

Sergey Lopatin

Raimund Becher

Peter Klöfer

Max Jehle

Davide Parrotto

Jan Schleiferböck

Armin Rupp

Frank Gutmann

Andreas Roβberg

Karl-Heinz Banholzer

Miroslaw Alznauer

Jürgen Lange

Michael Noack

Alexander Gugenberger

Kristine Bedner

Martin Burgard

Drewes Ulfert

Miriam Volz

Manuel Bondi-Liedtke

Jan Schleiferbock

Karl Floegel

Sergej Lopatiin

Yanli Wang

Jonas Conradt

Andreas Roßberg

Florian Gutmann

Alexander Beck

Ingo Buschke

Christian Hahn

Torston Pechstein

Manuel Liedtke

A differential pressure transducer with overload protection includes a measuring element body, two separating diaphragms, two overload diaphragms with radially variable material thickness h(r), a differential pressure transducer for converting a pressure difference into an electrical signal, and two hydraulic paths. The overload diaphragms are connected to the measuring element body to form overload chambers and the separating diaphragms are connected to the measuring element body to form separating diaphragm chambers in which one of the overload diaphragms are enclosed. The separating diaphragm chambers are hydraulically connected to the overload chambers below the other separating diaphragm chamber and to the differential pressure transducer via one of the hydraulic paths, which extend at least in sections through the measuring element body. The overload diaphragms have a base surface, which faces a mating surface in an overload chamber against which the overload diaphragms are pre-stressed in the operative state at pressure equilibrium.

Differential pressure measuring sensor with overload protection

A differential pressure sensor for determining the differential pressure between two pressures includes a converter chamber including a differential pressure measuring cell, and a measuring unit including a main body and a coplanar double-membrane system with two double membranes, each including a separating membrane and an overload membrane with a pressure chamber between the separating membrane and the overload membrane and an additional pressure chamber between the overload membrane and the main body. Each pressure chamber and each additional pressure chamber is paired with at least one capillary connection such that in the event of an overpressure, the overpressure is hydraulically transmitted from the high-pressure side to the low-pressure side via a hydraulic fluid such that the overload membrane and the separating membrane are deflected, and the hydraulic fluid displaced from the high-pressure side to the additional pressure chamber on the low-pressure side before the overpressure reaches the pressure-sensitive element.

Differential pressure sensor for determining the differential pressure between two pressures

A pressure measuring device includes a ceramic pressure sensor including a ceramic measuring membrane and a sensor mounting configured to secure the pressure sensor such that a membrane region of the measuring membrane surrounded by a membrane edge is contactable with a medium having a pressure to be measured. The sensor mounting includes a titanium or titanium alloy mounting element including an opening through which the membrane region is contactable with the medium. The membrane edge is connected directly with the mounting element by a diffusion weld produced by a diffusion welding method.

Pressure measuring device having a membrane edge and mounting element connected by a diffusion weld

A corrosion protection element is described, with which in simple and cost effective manner a reliable corrosion protection of field devices can be provided, which field devices comprise at least one component of stainless steel in contact with an environment of the field device. Corrosion protection elements of the invention are distinguished by features including that they are embodied as sacrificial anodes comprising iron or rustable steel and have a form, which is embodied in such a manner that they can be applied to the component of the field device in such a manner that the sacrificial anode is in electrically conducting contact with the component.

Corrosion-protection element for a field device

The present disclosure discloses process seals having a form retaining core and a coating of a thermoplastic sealing material for pressure sensors. The process seals can be replaced in simple manner, especially essentially without loss of measurement accuracy. The process seals are characterized by features including that they are pre-aged in a pre-aging method performable in a reproducible manner and insertable in the pressure sensor as replaceable components, wherein the process seals were clamped during the pre-aging method in a clamping apparatus exerting a clamping force thereon, wherein the clamping apparatus has a clamping geometry surrounding the process seal clamped therein, which is essentially identical to the clamping geometry surrounding the process seal in the pressure sensor.

Pressure sensor including replaceable process seal for improved measurement accuracy

A vibronic sensor for monitoring a flowable medium, comprising: an oscillator to which a medium surrounding the oscillator can be applied; at least one electromechanical transducer for exciting the oscillator to mechanical vibrations in accordance with driver signals and/or for outputting transducer signals that depend on vibrations of the oscillator; an operating and evaluating unit for providing the driver signals for driving the electromechanical transducer, for capturing the transducer signals, and for determining the presence, the density, and/or the viscosity of the medium in accordance with the transducer signals, wherein the operating and evaluating unit is designed to detect whether the medium in the pipe has a flow velocity above a limit value on the basis of time-varying modifications of the transducer signals.

Vibronic sensor and measuring assembly for monitoring a flowable medium

A pressure measurement cell comprises: a ceramic counter body; a ceramic measuring diaphragm which is joined in a pressure-tight manner with the counter body, creating a measurement chamber between the counter body and the measuring diaphragm, by means of a circumferential joint. The measuring diaphragm can be deformed by a pressure to be measured; an electrical converter for converting a pressure-dependent deformation of the measuring diaphragm into an electrical signal; and a temperature transducer for providing at least one electrical signal dependent on a temperature or on a temperature gradient of the pressure measurement cell. The temperature transducer comprises at least one first thermocouple having a galvanic contact between a first conductor with an electrically conductive material and a second conductor with at least one second electrically conductive material.

Ceramic pressure measurement cell having at least one temperature transducer and pressure sensor having a pressure measurement cell of this type

A pressure sensor for determining a pressure measurement variable includes a housing, a pressure sensor element arranged in the housing, a lighting means arranged in the housing and a control/evaluation unit, the pressure sensor element having a semiconductor material and a measuring membrane, which has at least one integrated resistance element. When the measuring membrane experiences a pressure dependent deflection, the control/evaluation unit ascertains using the integrated resistance element, an electrical signal for determining the pressure measurement variable, wherein the lighting means optically excites the integrated resistance element, and the control/evaluation unit ascertains, based on a change of the electrical signal caused by the optical excitation, whether a malfunction of the pressure sensor is present.

Pressure sensor and method for monitoring a pressure sensor

A flange-set for a pressure difference measuring transducer with two flanges mountable on external sides of a measuring mechanism of the pressure difference measuring transducer lying opposite one another and containing membranes to be loaded with pressures, as well as a pressure difference measuring transducer equipped with the flange-set. Each of the flanges comprises: a wall, which in the mounted state covers one of the two membranes of the measuring mechanism and encloses a pressure chamber bordering on such membrane. Arranged on a first side of the wall is a first process connection, which includes a pressure duct connection region, in which opens a pressure duct extending through the flange to the pressure chamber. The first process connections are embodied in such a manner that a pressure difference measuring transducer equipped with the flange-set is mountable and connectable via the first process connections (without interpositioning of an adapter) on a process connection, which has a first process connection geometry designed for the connection and mounting of pressure difference measuring transducers with measuring mechanisms having membranes arranged next to one another in a plane.

Flange-set for a pressure difference measuring transducer

A pressure measuring device, comprising: a pressure measuring cell having a measuring membrane, at least one platform and a pressure chamber formed therebetween. An electrical transducer for transducing a deflection of the measuring membrane into a pressure dependent, primary signal; a cylindrical housing having a measuring cell chamber, in which the pressure measuring cell is arranged, and an end face pressure receipt opening in communication with the pressure duct; and an electronic circuit in the housing for operating the electrical transducer, and for processing the primary signal, and for outputting a measurement signal. The cylinder axis of the pressure measuring cell forms with the cylinder axis of the housing an angle, which amounts to not less than 80&#xb0;, and which is especially preferably a right angle.

Pressure measuring device

A differential pressure measuring cell comprises a measuring membrane; two opposing bodies; and one converter. The measuring membrane is arranged between the opposing bodies and is connected in a pressure-tight manner to the two opposing bodies, forming in each case one measuring chamber. The opposing bodies each have a pressure duct through which a pressure can be made to act upon the respective measuring chamber. The converter is provided in order to convert a deformation of the measuring membrane, which deformation is dependent upon a difference between the pressures, into an electrical signal; wherein the opposing bodies each have a chamber section oriented toward the measuring membrane and a rear wall section oriented away from the measuring membrane with, between these, a decoupling chamber. The chamber sections each have an equalizing duct between the measuring chamber and the decoupling chamber, wherein the decoupling chamber has a diameter that is at least as large as the diameter of the measuring chamber.

Differential pressure measuring cell

The present disclosure relates to a method for manufacturing a component of a field device for determining or monitoring a process variable of a medium in a container, wherein the component is created via a 3D printing method, wherein during the creation the component is supplied at an intermediate state of the component with an exciter signal, wherein a response signal of the component to the exciter signal is registered, wherein shape and/or structure of the component are/is modified via the 3D printing method, when the current response signal does not agree with a predetermined response signal, and wherein the two previous method steps are alternately repeated, until the current response signal agrees with the predetermined response signal within predetermined tolerance limits.

Method for manufacturing a component of a field device

A differential pressure measuring pickup comprises a measuring pickup body and a differential pressure sensor. The measuring pickup body has a process interfacing surface with a first pressure input opening and a second pressure input opening. The differential pressure sensor can be loaded with a first pressure through the first pressure input opening and with a second pressure through the second pressure input opening. The first pressure input opening is closed by way of a first separating diaphragm and the second pressure input opening is closed by way of a second separating diaphragm. The first separating diaphragm is sealed with respect to the surroundings by way of a first seal, and wherein the second separating diaphragm is sealed with respect to the surroundings by way of a second seal. The differential pressure measuring pickup is tensioned during measuring operation with the process interfacing surface thereof against a process interfacing flange, wherein at least one plate-shaped spacer element with plane-parallel surfaces is clamped in between the process interfacing flange and the process interfacing surface, which spacer element defines the spacing between the process interfacing surface and the process interfacing flange and limits clamping of the seals between the process interfacing surface and the process interfacing flange.

Differential pressure measuring pickup

A pressure sensor comprises an operating circuit and a pressure-measuring cell comprising a counter body, a measurement membrane, which is arranged on the counter body and can be deformed by a pressure to be measured, and a capacitive transducer, which has at least one membrane electrode arranged on the measurement membrane and at least one counter-body electrode arranged on the counter body. The capacitance between the membrane electrode and the counter-body electrode depends on a pressure-dependent deformation of the measurement membrane, wherein at least the membrane electrode has a temperature-dependent impedance. The operating circuit is designed to sense at least one capacitance between the at least one counter-body electrode and the at least one membrane electrode and to provide a pressure measurement value on the basis of at least one capacitance and to determine the impedance of the membrane electrode&#x2014;particularly, the ohmic portion of the impedance of the membrane electrode.

Capacitive pressure-measuring cell having at least one temperature sensor and pressure measurement method

A method for manufacture of at least one component of a field device for determining or monitoring a process variable, wherein the field device is applied in automation technology and is manufactured from at least one material. The method comprises method steps as follows: specifying at least one structure related and/or material related boundary condition of the component and/or a boundary condition relevant for the functionality of the component and/or at least one external boundary condition, which takes into consideration the influence of environmental conditions on the component at the location of use; optimizing the structure of the component via a finite element model taking into consideration the at least one structure related and/or material related boundary condition and/or the at least one boundary condition relevant for the functionality of the component and/or the at least one environmental condition, wherein the optimized structure of the component is described by digital data; transferring the digital data, which describe the optimized structure of the component, to a 3-D printer; and printing the component in accordance with the digital data.

Method for manufacture of at least one component of a field device

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Schopfheim, Germany

Thomas Uehlin