Abstract: A retractable assembly, comprising: a housing; an immersion tube, which is axially movable between a service position and a process position. A first inlet facing away from the medium and a second inlet facing the medium. The immersion tube is moved from the service position to the process position by supplying the first inlet with energy, and the immersion tube is moved from the process position to the service position by supplying the second inlet with energy. A first mechanical blocking member shifts against a spring bias, and the blocking member engages in a first groove on the immersion tube. The first groove is located in the movement direction. The spring bias is so embodied that supplying the second inlet with energy releases the blocking member from the groove, whereby movement of the immersion tube from process position to service position becomes possible.

Abstract: A method for turbidity measurement in a measured medium uses a turbidity sensor, which comprises at least a first and a second emitter and at least a first and a second detector. The first and the second emitters are excited one after the other to produce light signals directed into the measured medium; wherein each light signal travels along a first propagation path through the measured medium to the first detector, and is converted by such into a first detector signal; and travels along a second propagation path through the measured medium to the second detector, and is converted by such into a second detector signal. A turbidity value is ascertained based on the first and the second detector signals; wherein, by means of at least one additional detector, to which at least one of the light signals travels along an additional propagation path, an additional detector signal is ascertained, and, on the basis of the additional detector signal, the turbidity value is checked as regards its plausibility.

Abstract: An inductive conductivity measurement cell of the invention includes: sending coil, a receiving coil, and a coil support body having an annular, sending coil chamber and an annular, receiving coil chamber, wherein there extends through the coil support body at least one section of a closed media path, which passes through the sending coil chamber and through the receiving coil chamber, characterized in that the coil support body has first connection bores, which extend from a surface of the coil support body to the sending coil chamber and through which the connection lines of the sending coil extend, and second connection bores, which extend from a surface of the coil support body to the receiving coil chamber and through which the connection lines of the receiving coil extend. The connection lines of the sending coil in the first connection bores are shielded from the connection lines of the receiving coil in the second connection bores by the coil support body.

Abstract: An arrangement and method for calibrating a spectrometer with a spectrometric apparatus for measuring spectral fractions of the substance to be examined as well as with a calibration unit. The calibrating of the spectrometric apparatus and/or measurement data based on measured spectrometric data is performed, by the following steps: a) measuring a totality of spectral fractions of the substance to be examined; b) storing the totality of the measured spectral fractions in a memory module in the form of a multidimensional coefficient vector; c) automatic extracting, from the totality of the measured spectral fractions physically relevant for the particular measuring procedure via an automatically running, iterative, estimation method furnished in the calibration unit; and d) calibrating the measured spectrometric measurement data for the investigated substance based on the step c) extracted, spectral fractions of the spectrometric data physically relevant for the substance to be examined.

Abstract: A cable circuit includes a contactless interface for signal transmission between the cable circuit and the sensor module, wherein the sensor module is galvanically isolated from the cable circuit, and wherein signal transmission between the cable circuit and the sensor module occurs on an optical, inductive or capacitive path. Additionally, the cable circuit includes a signal processing unit, as well as a cable interface for connecting a cable, which connects the cable circuit with the measurement transmitter. The signal processing unit is integrated into the signal path. The signal processing unit is embodied to receive, via the cable interface, signals from the measurement transmitter, to condition them and to transmit them via the contactless interface to the sensor module, and to receive, via the contactless interface, signals from the sensor module, to condition them and to transmit them via the cable interface to the measurement transmitter.

Abstract: In a method for regenerating a biosensor, a biosensor is prepared having a substrate surface on which at least one receptor is immobilized. At least one ligand that is binding specific to the receptor is bound to the receptor, said ligand, together with the receptor, forming a ligand-receptor complex. To regenerate the biosensor, the ligand-receptor complex is brought into contact with an enzyme. The enzyme is selected so that it catalyzes the ligand into fragments. The enzyme is inert with respect to the receptor.

Abstract: An ion sensitive sensor having an EIS structure, including: a semiconductor substrate, on which a layer of a substrate oxides is produced; an adapting or matching layer, which is prepared on the substrate oxide; a chemically stable, intermediate insulator, which is deposited on the adapting or matching layer; and an ion sensitive, sensor layer, which is applied on the intermediate insulator. The adapting or matching layer differs from the intermediate insulator and the substrate oxide in its chemical composition and/or structure. The adapting or matching layer and the ion sensitive, sensor layer each have an electrical conductivity greater than that of the intermediate insulator. There is an electrically conductive connection between the adapting or matching layer and the ion sensitive, sensor layer.

Abstract: A measuring arrangement for registering an analyte concentration in a measured medium includes a three electrode arrangement having a working electrode, a reference electrode and a counter electrode. The working electrode includes an analyte-insensitive, redox mediator, and the reference electrode a pH-sensitive electrode. The counter electrode can be formed of an inert, electrically conductive material. The measuring arrangement can be embodied to provide a desired voltage between the working electrode and the reference electrode and to register the electrical current flowing, in such case, through the measured medium, between the counter electrode and the working electrode.

Abstract: A field device for process automation, composed of at least two components coupleable with one another, wherein, in each of the components, a control/memory unit is provided, in which, in each case, a parameter set with defined parameters is stored, and wherein, for the case, in which the at least two components are coupled with one another, at least one of the control/memory units reads, and compares with one another, the parameter sets stored in the separate control/memory units of the components, and wherein, in the case of a deviation in the parameter sets, the comparing control/memory unit of the control/memory units makes available, to the components coupled with one another, the intersection of the parameters of the parameter sets.

Abstract: A method for determining a failure rate of an electrochemical sensor type for a process, wherein the process is defined by determined values, or value intervals, of a plurality of specified process parameters, and wherein a plurality of defect types is specified for the sensor type, comprising steps as follows: assigning, by means of expert knowledge, a defect rate to each combination of one of the values, or value intervals, of the specified process parameters and one of the specified defect types; and calculating the failure rate of the sensor type according to a calculational specification with application of the defect rates assigned to the combinations of a value, or value interval, of a process parameter and a defect type.

Abstract: The invention relates to A sensor end module, comprising: a sensor cap having a first connecting element and a sensorially active element for contact with a medium; and a memory module, comprising: a housing having a second connecting element, wherein the second connecting element enters into a shape- and/or force interlocking connection with the first connecting element; a memory element, wherein the memory element contains information concerning the sensorially active element the memory element is arranged in or on the housing; a first communication interface for sending and/or receiving information and/or data, and wherein the first communication interface is in electrical contact with the memory element. Furthermore, the invention relates to a sensor and a measuring system.

Abstract: An ion-sensitive sensor with an EIS structure includes: a semiconductor substrate, on which a layer of a substrate oxide 103 is produced; an adapting or matching layer, which is prepared on the substrate oxide; a chemically stable intermediate insulator, which is deposited on the adapting or matching layer; and a sensor layer, which comprises a tantalum oxide or a tantalum oxynitride, and which is applied on the intermediate insulator; wherein the intermediate insulator comprises hafnium oxide or zirconium oxide or a mixture of zirconium oxide and hafnium oxide, and wherein the adapting or matching layer differs in its chemical composition and/or in its structure from the intermediate insulator and from the substrate oxide.

Abstract: Method for operating a measuring point having a base unit and a sensor unit, wherein the latter couples via a pluggable connector coupling with the base unit; the base unit serves for energy supply of the sensor unit, for data exchange with the sensor unit and for communication with a process monitoring installation, wherein the base unit includes: A first element of the pluggable connector coupling; a first microprocessor sensor data conditioning for communication with the process monitoring installation; a first data memory for saving measuring-point-specific data; wherein the sensor unit has a primary sensor and a sensor head; the primary sensor includes a transducer, which outputs a measured variable dependent signal; wherein the sensor head includes: A circuit for conditioning the transducer signals with an A/D converter and a second microprocessor for measurement signal processing, a second data memory for sensor data; a program memory which contains a firmware; and an interface with a second element of

Abstract: A method for operating an inductive conductivity-measuring cell having a primary circuit with a sending coil, a secondary circuit with a receiver coil, and a short-circuit path, which passes through the sending coil and the receiver coil. The sending coil couples via the short-circuit path inductively with the receiver coil, wherein, in the case of closed short-circuit path, a first electrical signal present in the primary circuit is measured, and wherein the first signal is compared with, and/or weighed against, values, which are furnished or stored.

Abstract: A method for determining and/or monitoring at least one process variable of a medium by means of at least of an electrochemical sensor comprising at least a first reference half cell and a second reference half cell, and comprising the method steps as follows: measuring a first electrical measured variable X1, cont with a first measuring period t1, meas and a first measuring intervalt1, int with reference to the first reference half cell; measuring at least a second electrical measured variable X2, discont with a second measuring period t2, meas and a second measuring interval t2, int with reference to the second reference half cell; wherein the second measuring intervalt2, int is greater than the first measuring interval tint; and determining the at least one process variable from at least one electrical measured variable X1, cont or X2, discont. Furthermore, the invention relates to an electrochemical sensor and to a system.

Abstract: A retractable assembly for a sensor, which determines a physical and/or chemical, process variable in a process medium. The retractable assembly has a housing, in which a tubular holder for accommodating the sensor is arranged such that it can be moved linearly by a drive unit. At least one cascaded cylinder is provided for the linear shifting of the tubular holder, wherein the cascaded cylinder comprises at least two cylinders arranged one after the other in the direction of the stroke movement. Furthermore, the cascaded cylinder is, or the cascaded cylinders are, embodied and/or operable in such a manner that the sensor is movable into at least two different positions.

Abstract: A membrane, especially for application in a sensor, which membrane includes a biocidal effect. The membrane comprises one or more components of the group consisting of: silver nano particles encapsulated in amphiphilic, core, shell structures, antimicrobial silanes, polymers with an antimicrobial end group, polyquads with modified end groups, and biocidally acting block copolymers. The membrane is resistant against aggressive agents, for example, corrosive or oxidizing cleaning agents, in the case of sterilizing, in the case of autoclaving, in the case of thermal loading and/or in the case of mechanical loading.

Abstract: A cable circuit for connecting a sensor module to a measurement transmitter. The cable circuit includes a contactless interface for signal transmission between the cable circuit and the sensor module, wherein the sensor module is galvanically isolated from the cable circuit, and wherein signal transmission between the cable circuit and the sensor module occurs on an optical, inductive or capacitive path. Additionally, the cable circuit includes a signal processing unit, as well as a cable interface for connecting a cable, which connects the cable circuit with the measurement transmitter. The signal processing unit is integrated into the signal path.

Abstract: In a method for producing software modules for field devices for process automation technology (PROFIBUS), wherein the software modules serve as device descriptions and have defined interfaces, in accordance with the FDT/DTM, for application programs in process control systems, syntactically and semantically correct, standard device descriptions are produced in EDD 1.1 from PDM, HCF or company-specific device descriptions for field devices, and the EDD 1.1 versions are then converted into corresponding software modules by means of a compiler C.

Abstract: A measuring transducer embodied to produce and output a measurement signal dependent on an activity of a target ion present in a measured medium, wherein the measuring transducer has, in a region provided for contact with the measured medium, at least one membrane conducting the target ion; wherein the measuring transducer has a first potential sensing element and a second potential sensing element, and wherein at least one section of the second potential sensing element is arranged in the interior of the membrane and the first potential sensing element is arranged in an inner electrolyte, which is separated from the measured medium by the membrane and is in contact with the membrane.