Abstract: A method for operating a magneto-inductive flow measuring system, wherein the magneto-inductive flow measuring system has a measuring tube, wherein measuring tube has a lumen for the conveying an at least slightly electrically conductive, measured substance, and wherein the magneto-inductive flow measuring system has a first and a second electrode electrically interacting with the measured substance.

Abstract: Method for determining ion concentration or concentration of a substance in a solution by means of an ion selective, field effect transistor or an ion sensitive sensor having an EIS structure. The method comprises steps as follows: at least at a predetermined point in time of a first measuring phase, the potential lying on the electrode is sensed relative to a reference potential; before beginning a sterilization- and/or cleaning phase following the first measuring phase, the last voltage sensed during the first measuring phase is stored; and at the beginning of a second measuring phase following the sterilization- and/or cleaning phase, is the voltage stored during the sterilization phase is applied on the electrode.

Abstract: An electronic circuit for amplifying a wanted signal, comprising: a comparator having a first input, a second input and an output, wherein a connection is provided, which leads the wanted signal to the first input; a first driver stage comprising an input and an output, wherein the first driver stage includes at least a first push pull end stage; a low-pass filter having an input and an output, wherein the output of the first driver stage leads to the input of the low pass filter; a first feedback network; and a second feedback network.

Abstract: A method for operating a measuring device comprising the following steps: providing a first sample of the liquid; ascertaining an updated calibration function by means of a standard addition method, wherein the first sample is supplemented at least once with a standard solution, which has a known concentration of the measured ion; determining a measured value of concentration of the measured ion in the first sample; providing a second sample of the liquid; ascertaining a measured value of concentration of the measured ion in the second sample as a reference measured ion concentration (cref) by means of a reference method; and determining a difference (cdisturb) between the apparent measured ion concentration (capparent) and the reference measured ion concentration (cref) and deriving a correction value (ckorr) therefrom for future measured values of concentration of the measured ion in the liquid, as ascertained with the measuring device.

Abstract: A method for operating an ion-sensitive sensor with a measurement circuit which includes an ion-sensitive electrolyte-insulator-semiconductor structure (EIS); wherein the measurement circuit is embodied to issue an output signal which is dependent on ion concentration, especially a pH value, of a measured liquid; and wherein the method comprises the steps of: introducing the ion-sensitive electrolyte-insulator-semiconductor structure into a measured liquid; accelerating charging processes in the region of an insulator layer of the ion-sensitive electrolyte-insulator-semiconductor structure by operating the sensor over a predetermined time span at least a first working point; and dynamically adapting the working point to set a second working point, and registering and processing the output signal of the measurement circuit at the second working point.

Abstract: A method for calibrating a sensor for measuring turbidity and/or solids content of a medium, wherein the sensor comprises at least one transmitting unit and at least two receiving units. The method comprises the steps of registering at least two measurement signals, which depend on the intensity of light scattered in the medium, wherein the light is sent from the transmitting unit and received by the receiving unit, abstracting the measurement signals to a feature vector, automatic selecting of a calibration model based on the feature vector, wherein the feature vector is transmitted to an earlier trained classifier and the classifier associates the calibration model with the feature vector, and calibrating the sensor with the automatically selected calibration model.

Abstract: A measuring system for determining a value of a physical or chemical, measured variable of a medium, includes: a base unit; at least one relay unit connected with the base unit and a sensor unit connected with the relay unit. The sensor unit includes a circuit having at least one microcontroller, at least a first memory region, and a second memory region. The upload software is embodied, in interaction with the microcontroller, to perform an updating of the basic software with at least one software module provided from the base unit. The relay unit includes a circuit having at least one microcontroller, and at least a first memory region, in which a basic software of the relay unit is stored. The circuit of the relay unit further includes a second memory region, in which an upload software of the relay unit is stored.

Abstract: A conductivity sensor for measuring conductivity of a medium surrounding the conductivity sensor, including: a first toroidal coil, which surrounds a first traversing opening for accommodating the medium and which serves for inducing an electrical current in the medium, a second toroidal coil, which surrounds a second traversing opening for accommodating the medium and which serves for registering a magnetic field produced by the induced electrical current. At least one of the toroidal coils has a plurality of first conductor sections, which extend in a plane of a multi-ply circuit card, a plurality of second conductor sections, which extend in a second plane of the circuit card, and a plurality of first vias, which connect the first conductor sections with the second conductor sections.

Abstract: In a method for determining a measured variable of a measured medium, wherein the measured medium is brought in contact with an indicator or an indicator mixture, whose absorption spectrum has a first, and a second, wavelength range, which essentially do not overlap, a first light source is activated for emitting a first light signal with a wavelength from the first wavelength range and a second light source is activated for emitting a second light signal with a wavelength from the second wavelength range.

Abstract: An apparatus for handling a liquid sample, especially for automatic removal of a liquid sample from a sample-taking location, comprising: a control unit; a sample collecting unit; a supply and metering system, which is embodied to convey a liquid sample from the sample-taking location and to meter the sample into a liquid receptacle of the sample collecting unit; a housing with a first housing part, which at least partially surrounds at least the sample collecting unit, and a second housing part, which is separated from the first housing part, and which at least partially surrounds a metering space; wherein at least parts of the supply and metering system are arranged in the metering space; and wherein the apparatus furthermore includes a plate, which is releasably connected with the second housing part surrounding the metering space, and which divides the metering space into a first metering space part and a second metering space part.

Abstract: A two-part sensor composed of a sensor head and a sensor-head counterpart, testing is performed as to whether a correct sensor head is connected with the sensor-head counterpart.

Abstract: A retractable assembly for immersion-, flow- and annex-measuring systems in analytical process technology for measuring at least one measured variable of a medium in a process containment, comprising an essentially cylindrical housing having a housing interior; an immersion tube, which is axially movable between a retracted service position in the housing and a process position extended from the housing. In the service position, the immersion tube is positioned in the housing interior; a closure element on an end region of the immersion tube facing the medium for sealing off the housing interior from the process containment when the immersion tube is located in the service position, and a proximity detector in or on the end region of the housing facing the medium for detecting the closure element in the service position.

Abstract: A probe system for measuring a measured variable of a fluid, comprising: A probe body, which is connectable to the process container by means of a process connection; axially shiftable in a guiding passageway of the probe body between a measuring position and at least two different treatment positions; an immersion tube, which has a protective cylinder on its front end immersible in the fluid; a measuring probe held in the immersion tube, having a measuring head, wherein the measuring head is arranged within a region of the protective cylinder having openings; a first treatment chamber formed between the guiding passageway and the immersion tube; a second treatment chamber formed between the guiding passageway and the immersion tube and adjoining the first treatment chamber on a side of the first treatment chamber facing away from the process connection; and a seal arranged between the first and second treatment chambers, wherein the immersion tube has a first section with a first outer diameter and a second

Abstract: An inductively working sensor for determining the conductivity of a liquid medium.

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: A potentiometric sensor apparatus, comprising: a measuring half-cell having a measuring membrane; a reference half-cell; and a measurement circuit for registering a potential difference between the measuring half-cell and the reference half-cell. The measuring membrane has, covering at least one portion of the measuring membrane during dry storage of the sensor apparatus, a coating, which is embodied, upon immersion of at least one immersion region of the sensor apparatus (which region comprises the measuring membrane and is intended for immersion in a measured medium) in a liquid, especially a water containing liquid, in the case of continued contact with the liquid, to dissolve, at least partially, off of the measuring membrane.

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: A measuring arrangement for registering a measured variable representing concentration of an analyte in a measured medium, includes: a first electrode modified with a redoxly active substance, a second electrode, and a measuring circuit, which comprises a voltage source for applying at least one predetermined voltage between the first electrode and a reference, and an apparatus for registering electrical current flowing, in such case, between the first electrode and the second electrode or for registering a variable correlated with the electrical current flowing between the first electrode and the second electrode, wherein the second electrode is modified with the same redoxly active substance as the first electrode.

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.