Endress + Hauser Flowtec Ag

Alstom Technology Limited

Axel Pfau

Anastasios Badarlis

Vivek Kumar

Hanno Schultheis

Oliver Popp

Tobias Baur

Stephan Gaberthüel

Alexander Grün

Jiri Holoubek

Dirk Boguhn

Martin Barth

Jiri Polak

Achim Wiest

Said Havakechian

Florian Krogmann

Torsten Iselt

Ralf Greim

Martin Arnold

Michel Wagner

Thomas Schonstein

Panagiotis Papathanasiou

Harald Müller

Emioni Papadopoulou

Frank Steinhoff

Arno Lang

Dirk Boghun

Thomas SCHÖNSTEIN

Stephan GABERTHÜEL

Fanos Christodoulou

A thermal, flow measuring device comprising a sensor with a metal sensor housing, which has a hollow body for connecting to a plug-in apparatus and/or a tube or pipe wall, wherein the hollow body has a base area; wherein the sensor housing has at least first and second pin sleeves, which protrude starting from the base area, wherein the metal sensor housing is embodied as one piece and the pin sleeves and the hollow body are connected together seam freely, especially weld seam freely.

Thermal flow measuring device and method for its manufacture

A thermal, flow measuring device comprising a sensor with a metal sensor housing, which includes a cap with a lateral surface and an end face, wherein the sensor housing has at least first and second pin sleeves, which protrude starting from the end face, wherein the sensor housing has a first heater in a first of the two pin sleeves and a temperature sensor in a second of the two pin sleeves for ascertaining a temperature of the medium; wherein the end face of the cap is divided at least into a base area and at least a first planar area inclined relative to the base area by an angle, wherein a second heater is arranged on an inner surface of the cap in the region of this first area.

Thermal, flow measuring device and a method for manufacturing a thermal, flow measuring device

The application discloses a thermal, flow measuring device comprising: a sensor including a metal sensor housing having a hollow body and a base; and at least first and second pin sleeves protruding from the base. In a first of the two pin sleeves a first heater is provided and in a second of the two pin sleeves a temperature sensor is provided for ascertaining a temperature of a medium. At least two elongated elements extend with at least the same length as the pin sleeves starting from the hollow body in parallel with the two pin sleeves. On a cutting plane perpendicular to the sensor axis another axis extends that is perpendicular to the connecting axis and wherein the separation of the elongated elements in their course parallel with the axis lessens in certain regions.

Thermal, flow measuring device and arrangement with a tube or pipe and the thermal, flow measuring device

A measuring device which has at least a first component, in which an integral measurement duct is provided or the first component forms in connection with additional components a measurement duct integrally in the measuring device. The measurement duct is provided for conducting a measured medium through the measuring device, characterized in that the first component has a first sensor for determining a first thermophysical property selected from thermal conductivity, thermal diffusivity and/or specific heat capacity of the measured medium, and wherein the measuring device has a second sensor, which vibrates and is provided for determining viscosity and/or density of the measured medium. The measured medium is conducted through the measurement duct from the first sensor to the second sensor.

Measuring device and method for determining a corrected mass flow and uses of the measuring device

A thermal flow measuring device for determining and/or monitoring the mass flow and/or the flow velocity of a flowable medium through a pipeline, comprising at least three sensor elements and an electronics unit. Each sensor element is in thermal contact with the medium, and includes a heatable temperature sensor. The electronics unit is embodied to heat each of the three sensor elements with a heating power, to register their temperatures, to heat at least two of the at least three sensor elements simultaneously, to ascertain the mass flow and/or the flow velocity of the medium, from a pairwise comparison of the temperatures and/or heating powers and/or at least one variable derived from at least one of the temperatures and/or heating powers, to provide information concerning a change of the thermal resistance of at least one of the at least three sensor elements, from a response to an abrupt change of the heating power supplied to at least one of the at least three sensor elements, to provide information concerning a change of the inner thermal resistance of the at least one sensor element, and in the case that a change of the inner and/or outer thermal resistance occurs in the case of at least one of the at least three sensor elements, to perform a correction of the measured value for the mass flow and/or the flow velocity and/or to generate and to output a report concerning the state of the at least one sensor element mass flow and/or the flow velocity.

Thermal, flow measuring device with diagnostic function

A thin-film sensor for a thermal flowmeter with at least a first substrate layer made of electrically non-conductive material, a second layer made of electrically conductive material and a cover layer to protect the resistance layer against abrasion, wherein the second layer is designed as two sensor elements, wherein at least a first of the two sensor elements is designed to introduce a heat quantity into a medium, and at least a second of the two sensor elements is designed to determine the ambient temperature, and the thin-film sensor has a gap that isolates the two sensor elements from one another.

Thermal flowmeter with energy storage element

A sensor of a thermal flow measuring device, as well as the flow measuring device itself. The sensor comprises a sensor platform, which bears at least one measuring sensor element and a heated sensor element. Each of the at least two sensor elements is surrounded by a metal sleeve, which protrudes from the sensor platform. The sensor has a plate-shaped element, which defines a plane, whose axis extends parallel to the axis of at least one of the metal sleeves, wherein the plane is spaced from the sensor platform in the axial direction of the metal sleeve. The metal sleeve with the heated sensor element has a terminal end face and the plate-shaped element is provided along the end face of the metal sleeve with the heated sensor element for flow guidance.

Sensor and flow measuring device

A thermal, flow measuring device for determining and/or monitoring a mass flow of a measured medium through a measuring tube, comprising a sensor having a first heatable resistance thermometer and at least a second heatable resistance thermometer, wherein the sensor has a longitudinal axis and an end face, which is divided into at least two adjoining segments, wherein a surface normal vector of at least a first segment forms with the longitudinal axis of the sensor an angle of at least 5&#xb0;; and use of a thermal, flow measuring device.

Thermal, flow measuring device

A method for determining mass flow of a gas by means of a mass flow meter, which has a first and a second temperature sensor, which can be flowed around by the gas. The first temperature sensor is heated with a heating power Q, wherein the mass flow of the medium is determined by means of a power coefficient PC=Q/&#x394;T as a function of a heating power Q and a temperature difference &#x394;T=T&#x2212;Tbetween the measured values of the temperature sensor. A corrected power coefficient PCis determined, wherein at least one correction occurs by means of at least one recovery correction term K, wherein the recovery correction term Khas the form K=&#x394;&#xb7;u/(2&#xb7;c), wherein u is the flow velocity and cthe heat capacity of the medium, &#x394;is an element of the set {&#x394;; &#x394;; &#x394;}, &#x394;:=e&#x2212;c, &#x394;:=e&#x2212;cand &#x394;:=e&#x2212;e=&#x394;&#x2212;&#x394;, eand eare the recovery factors of the first, respectively second, temperature sensors, and wherein cis a constant reference value, for which holds c&#x2266;1, especially c=1.

Method for thermally determining mass flow of a gaseous medium and thermal mass flow meter

A method for the manufacture of a sensor for a thermal flow measuring device, wherein the sensor has at least one housing with a first open end and a second open end. The first open end is securable in a sensor holder; and at least one resistance thermometer is inserted into the housing through the second open end of the housing and the second open end of the housing is closed. Cables for electrical contacting of the resistance thermometer lead out of the housing through the first open end of the housing.

Manufacturing method for sensor of a thermal flow measuring device

A for operating a thermal, flow measuring device having a first sensor having a first heatable, resistance thermometer and at least one additional, second sensor having a second heatable, resistance thermometer, wherein a decision coefficient is calculated according to the formula DC=(PC&#x2212;PC)/PC, wherein PC(t=t)=P(t)/(T(t=t)&#x2212;T(t=t)) and PC(t=t)=P(t)/(T(t=t)&#x2212;T(t=t)), with P being the heating powers absorbed by the corresponding resistance thermometers at the points in time t and the temperature values T, wherein the value of the decision coefficient shows flow direction of a measured medium in the measuring tube.

Method for registering flow and a thermal, flow measuring device

A thermal, flow measuring device for determining and/or monitoring the flow of a measured medium through a measuring tube. The thermal, flow measuring device includes: a first pin-shaped shell and at least a second pin-shaped shell; a first resistance thermometer and at least a second resistance thermometer. At least the first resistance thermometer is embodied so as to be heatable, wherein the resistance thermometers, in each case, have a first surface, and at least a second surface, which lies opposite the first surface. The first pin-shaped shell surrounds the first resistance thermometer, and the second pin-shaped shell surrounds the second resistance thermometer. The pin-shaped shells are fillable with a fill material. In each case, at least one spacer is placeable between the pin-shaped shell and the first surface of the resistance thermometer, and the second surface of the resistance thermometer is at least partially covered with fill material.

Temperature sensor and method for its manufacture

A thermal flow measuring device and method for the manufacture of a thermal flow measuring device with a housing, which has at least one shell. A temperature sensor element is arranged in the shell which borders the housing. Each first point of an edge terminating the outside of the shell in the region of a second end section of the shell has a distance to the longitudinal axis of the shell, which is at least 0.2 mm greater than the distance of all second points of the outside of the shell to the longitudinal axis of the shell, with a first point of the edge, in each case, having a distance projected on the longitudinal axis of the shell from the first point of the edge of at least 0.2 mm in the direction of the first end section of the shell.

Housing of a temperature sensor, especially of a thermal flow measuring device

Thermal, flow measuring device and method for operating a thermal, flow measuring device. The thermal, flow measuring device has a first sensor with a first heatable resistance thermometer and at least an additional, second sensor with a second heatable resistance thermometer; wherein a decision coefficient is calculated according to the formula DC=(PC&#x2212;PC)/PC, with PC(t=t)=P(t)/(T(t=t)&#x2212;T(t=t)) and PC(t=t)=P(t)/(T(t=t)&#x2212;T(t=t)), with P being the heating powers consumed by the corresponding resistance thermometers at the points in time t, and T being the temperature values; wherein the value of the decision coefficient indicates the flow direction of a measured medium in the measuring tube.

Thermal, flow measuring device and method for operating a thermal, flow measuring device, wherein the thermal, flow measuring device has a first sensor with a first heatable resistance thermometer and at least an additional, second sensor with a second heatable resistance thermometer. A decision coefficient is calculated according to the formula DC=(PC&#x2212;PC)/PC, with PC(t=t)=P(t)/(T(t=t)&#x2212;T(t=t)) and PC(t=t)=P(t)/(T(t=t)&#x2212;T(t=t)), with P being the heating powers consumed by the corresponding resistance thermometers at the points in time t, and T being the temperature values; wherein the value of the decision coefficient indicates the flow direction of a measured medium in the measuring tube.

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Aesch, Switzerland

Axel Pfau