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 collapsible, protective apparatus for protecting an object against weather related influences and comprises an element having a plurality of interconnected segments, including at least one rear wall segment, a roof segment, a first side wall segment and a second side wall segment, wherein the segments are connected to one another via at least three bendable transition regions, wherein the transition regions are located between the roof segment and the rear wall segment and between the first side wall segment and the rear wall segment and between the second side wall segment and the rear wall segment, and wherein the individual segments can be formed from a planar, spread mode with the assistance of the transition regions into a three-dimensional structure.

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: 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 analytical device for automated determining of a measured variable of a liquid sample, includes: a base module; a replaceable cassette connectable with the base module and having at least one liquid container connectable via a fluid line with a measuring cell and containing a reagent to be added to the liquid sample for forming a measured liquid; and a measuring transducer for registering measured values correlated with the measured variable for the measured liquid accommodated in the measuring cell. The cassette has, associated with the at least one liquid container, a fluid coupling apparatus having a primary component and a secondary component and serving for producing a connection of the fluid line with the liquid container.

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: An electrode for application in electrochemical measuring systems, comprising: at least one housing, in which at least one chamber is embodied, at least one electrolyte, which is arranged in the chamber, at least one potential forming element, which is arranged in the chamber in such a manner that the electrolyte wets the potential forming element, and at least one electrical conductor, which contacts the potential forming element and leads the potential from the chamber, characterized in that the electrical conductor is provided with at least one coating.

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: A reference half-cell for application in an electrochemical sensor, comprising a housing, in which a chamber containing a reference electrolyte is formed, wherein the reference electrolyte (5, 105) is in contact with a medium surrounding the housing via a liquid junction arranged in a wall of the housing, wherein the liquid junction comprises a porous diaphragm, especially a porous ceramic diaphragm, and wherein the diaphragm has, at least partially, a coating, which comprises at least one metal.

Abstract: A measurement transmitter for receiving and processing measurement data, comprising: a transmitter housing with at least one circuit chamber within the transmitter housing, an electronic circuit, which is arranged in the circuit chamber, for the supply of a sensor and for receiving and processing of measurement data of the sensor via at least one inductively coupling interface, wherein, the inductively coupling interface comprises a plug-in connecting coupling with a first plug-in coupling element on a primary side and a complimentary second plug-in connection element on a secondary side, wherein, the second plug-in connection element is detachably connectable to the first plug-in connection element, and wherein, the first plug-in connection element comprises at least a first inductive coupler in a coupling housing, which is formed hermetically sealed, in particular substance-to-substance bonded to, or formed integrally with, the transmitter housing.

Abstract: An electronic circuit comprising a rectifier which passes only one polarity of a carrier signal; at least one filter, subsequent to the rectifier, for the suppression of at least one frequency range of the carrier signal; a voltage matching network, subsequent to the filter, which is embodied so that it matches the voltage of the desired signal, and leads to one of the two inputs of a comparator, wherein an output of the comparator is switched, depending on the difference between the two inputs, and a feedback network connected in parallel with the comparator, wherein the feedback network connects one of the two inputs of the comparator with the output of the comparator, the feedback network comprises a high-pass characteristic. The invention furthermore comprises a method for the recovering of desired signals from a carrier signal by demodulation and a modem.

Abstract: A method for degassing a liquid by means of a piston pump unit having a receiving chamber serving for accommodating the liquid to be degassed and connected with at least one supply line and at least one drain line, and a piston seated in the receiving chamber for performing stroke movements and liquid sealing the receiving chamber on one end. The following steps are included: drawing liquid via the supply line into the receiving chamber by performing a first stroke movement of the piston in the case of blocked drain line and open supply line; producing a negative pressure in the receiving chamber by continuing the first stroke movement of the piston in the case of blocked supply line and blocked drain line; and opening the drain line and removing a gas phase present in the receiving chamber from the receiving chamber via the drain line by performing a second stroke movement of the piston directed counter to the first stroke movement in the case of an opened drain line and blocked supply line.

Abstract: A method for monitoring and/or controlling the process flow of a waste water system having waste water in waste water lines, comprising the steps as follows: measuring volume flow of waste water at a location remote from a waste water cleaning plant; measuring at least one additional waste water relevant parameter at the location remote from the waste water cleaning plant; evaluating the measurement data and detecting system relevant events; and undertaking measures in the waste water cleaning plant and/or at the location remote from the waste water cleaning plant as a function of the system relevant event. Furthermore, the invention relates to a system for performing the method.

Abstract: A sample preparation system for an analytical system for determining a measured variable of a sample liquid, comprising: a transport unit connected with a sample taking location via a first fluid conducting line; a sample collecting unit, which serves the analytical system as a staging area for automated removal of liquid samples, based on which the measured variable is determined; a filter unit arranged between the sample taking location and the transport unit; and at least one reservoir connected via a second fluid conducting line with the filter unit for providing a cleaning medium for cleaning the filter unit; wherein the transport unit is embodied to transport sample liquid from the sample taking location through the filter unit into the sample collecting unit. The cleaning medium includes an oxidizing agent.

Abstract: A method for recognizing and/or assessment of device and/or process related disturbances in a measurement signal, especially in a turbidity measurement of a fluid or gaseous medium with the steps of: generation of transmittable signals by means of at least one transmitter, wherein the transmitted signal is transformed through interaction with the medium, depending on the measurement variable, collection of measurement signals by means of at least one of the collectors assigned to the transmitter from the transformed transmission signals, characterized in that, the measurement signals are further processed by generating a distortion ratio of the measurement signal by processing the measurement signal with a distortion factor acquired from a dimensional reduction technique, especially principal component analysis (PCA), wherein the distortion factor takes into account the principal components with the largest contribution to the total variance, and assessing the distortion ratio over the course of time.