Endress + Hauser Gmbh + Co. Kg

Endress+hauserse+co. Kg

Basf Aktiengesellschaft

Klaus Feisst

Eric Bergmann

Qi Chen

Dietmar Spanke

Alexey Malinovskiy

Stefan Gorenflo

Helmut Muenstedt

Peter Klofer

Edgar Schmitt

Helmut Moehwald

Rolf Schwald

Klaus Pankratz

Ottmar Baur

Gerhard Hellwig

The disclosure relates to a radar-based, fill level measurement device for determining a fill level of a fill substance located in a container. The fill level measurement device includes a high frequency unit for producing high frequency signals and for determining fill level based on received high frequency signals. A hollow conductor is provided for transmitting or receiving high frequency signals. The hollow conductor is subdivided into a first portion facing the high frequency unit, and a second portion faceable toward the fill substance, wherein an insulation transparent for the high frequency signals separates the first portion fluidically from the second portion. A first hollow space is connected fluidically with the second portion and the first hollow space is arranged relative to the second portion behind the insulation. Thus condensate formation on the insulation is prevented, so that the functioning of fill level measurement device is not degraded.

Fill level measurement device

The present disclosure relates to a radar-based fill-level measurement device for measuring a fill level of a fill substance located in a container. Besides a housing, the device includes an antenna and a housing neck, which is arranged between the housing and the antenna, wherein the housing neck has between the housing and the antenna a predefined thermal resistance, and at least one electronics module partially arranged in the housing neck. The thermal resistance of the housing neck is dimensioned in such a manner to be low, such that, at a temperature in the container of at least 200&#xb0; C., the temperature at the electronics module is limited to, at most, 80&#xb0; C. Thus, a high resolution and temperature-resistant and simultaneously compact, fill-level measurement device is provided for high radar frequencies of, for example, 79 GHz.

Temperature-resistant fill level measurement device

A device for determining or monitoring the filling level of a filling material stored in a container in a process, comprising a signal generating unit, a coupling/decoupling unit which couples the high-frequency measurement signals to an antenna unit or decouples said high-frequency measurement signals from the antenna unit. The antenna unit has a wave guide and an antenna element which widens in the direction of the filling material. The antenna unit emits high-frequency measurement signals in the direction of the surface and receives the echo signals reflected by the surface of the filling material. A control/evaluation unit determines the filling level of the filling material in the container from the transit time of the measurement signals. At least one process separation device is thereby provided in or on the antenna unit, which process separation device protects the coupling/decoupling unit from influences of the process, wherein a first process separation device is produced at least partially from a dielectric material with a specified porosity, and wherein the first process separation device is configured to be at least approximately transparent to the high-frequency measurement signals.

Device for determining or monitoring the filling level of a filling material stored in a container

An apparatus for determining or monitoring the fill level of a fill substance located in a container in a process, comprising: a signal producing unit; an in-coupling/out-coupling unit an antenna unit; wherein the antenna unit has a hollow conductor and an antenna element widening toward the fill substance and the antenna unit transmits high-frequency measuring signals in the direction of the surface of the fill substance and receives echo signals reflected on the surface of the fill substance; and a control/evaluation unit, which ascertains the fill level of the fill substance in the container based on travel time of the measuring signals. In or on the antenna unit a process isolation is provided, which is at least approximately transparent for the high-frequency measuring signals and which protects the in-coupling/out-coupling unit against influences of the process. The process isolation is an isostatically pressed, molded part, which is manufactured of at least two plastics having different physical and/or chemical properties.

Apparatus for determining fill level of a fill substance in a container with process isolation having at least two plastics

The invention relates to an apparatus for determining or monitoring a physical or chemical, process variable, comprising a sensor element () having at least one temperature sensitive, sensor region and/or an electronics unit () having at least one component (), whose specification requires use within a predetermined temperature range, wherein a connecting component () is provided between the temperature sensitive, sensor region and the remaining regions of the sensor element () and/or between the sensor element () and the electronics unit (), wherein the connecting component () is composed at least partially of a metal- or ceramic foam () having a predetermined porosity.

Apparatus for determining or monitoring a physical or chemical, process variable

A method for ascertaining and monitoring fill level of a medium in a container using a travel time measuring method, wherein transmission signals are transmitted toward the medium and reflection signals are received. The received reflection signals are registered as echo signals in an echo function dependent on travel time. Based on known measuring device- and container-specific reflection planes, possible reflection regions in the echo function are calculated by means of an evaluation algorithm. In the calculated reflection regions, the disturbance echo signals and/or the multiecho signals in the echo function are classified, wherein non-classified reflection signals are ascertained and checked as wanted echo signals by means of a search algorithm, wherein, from a position and/or an amplitude of at least one wanted echo signal, fill level is determined, and wherein the measured value of fill level is output.

Method for ascertaining and monitoring fill level of a medium in a container by means of a fill-level measuring device using a travel time measuring method

An apparatus forming a measuring device for ascertaining and monitoring a chemical or physical process variable in a high temperature process in a container, wherein the measuring device is formed from at least a sensor element located in the process and at least a measurement transmitter located outside the process. At least a first sealing element is provided for sealing against penetration of process medium into the sensor element. The sensor element has a boundary location between a first sensor element region, which faces the process and which is embodied with a high thermal resistance, and a second sensor element region, which faces away from the process and which has a low thermal resistance, and that the temperature sensitive element is arranged in the sensor element at the boundary location.

Measuring device of process automation technology for ascertaining and monitoring a chemical or physical process variable in a high temperature process in a container

A fill-level measuring device for ascertaining and monitoring fill level of a medium located in the process space of a container by means of a microwave travel time measuring method. The device comprises a measurement transmitter and an antenna unit, which is constructed at least of a hollow conductor and a radiating element A microwave transmissive, process isolating element is inserted for process isolation into the hollow conductor between the measurement transmitter and the horn shaped radiating element contacting the process space. The process isolating element is embodied as a hollow body having at least one tubular hollow body region matched to the shape of the hollow conductor, and a pointed hollow body region neighboring the hollow body region in the direction of the radiating element and having a wall thickness selected based on reflection, or lack thereof, of the microwave signals.

Fill-level measuring device for ascertaining and monitoring fill level of a medium located in the process space of a container by means of a microwave travel time measuring method

A fill level measuring device for ascertaining and monitoring fill level of a medium in the process space of a container by means of a microwave travel time measuring method. The device includes: measurement transmitter; and an antenna unit, which is constructed at least of a hollow conductor and a radiating element, wherein a process isolation element is inserted into the hollow conductor for process isolation between measurement transmitter and the process contacting, radiating element. The process isolation element is made of a ceramic material and includes at least one glass layer, via which the process isolation element is directly glass bonded in the hollow conductor in a glass bonding region.

Level monitoring device for determining and monitoring a fill level of a medium in the process area of a vessel

The invention relates to an apparatus () for ascertaining and monitoring fill level () of a medium () in a container () by means of a travel-time measuring method of high-frequency measurement signals () with a horn antenna () having a waveguide section (), a flared, horn section () and a cavity () filled, at least partially, with a dielectric filling body (). Object of the invention is to provide a simple, temperature-stable, horn antenna filled with a dielectric material.

Device for determining and monitoring the level of a medium in a container

A fill level measuring device working with microwaves is provided, with which, with very small inventory cost, many applications having a wide variety of different measuring conditions can be handled. The device includes a modularly assembled antenna, having a cylindrical segment closed at one end. A sending and/or receiving element for microwaves is arranged in the segment. A thread of fixed, predetermined diameter is provided on the open end of the segment. The antenna additionally has a radiating and/or intake element, on whose end facing the segment is provided a thread of the fixed, predetermined diameter. Optionally, the antenna has one or more cylindrical functional elements between the segment and the radiating and/or intake element, which have on both ends, in each case, threads with the fixed, predetermined diameter. The segment, the optional functional elements and the radiating and/or intake element are screwed together by means of the threads.

Fill level measuring device working with microwaves

In a solid-state capacitor comprising a positive and a negative electrode, a dielectric medium and a solid electrolyte, the solid electrolyte contains an electroconductive polymer as essential constituent.

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Stegen, Germany

Klaus Feisst