Abstract: The present disclosure relates to a method for manufacturing a sensor cap with at least one main body and a membrane for an optochemical or electrochemical sensor for determining and/or monitoring the concentration of an analyte in a measuring medium, a corresponding sensor cap, and a corresponding sensor. In one aspect of the present disclosure, a permeable membrane is provided with a surface for contacting the measuring medium, as well as a main body with at least one sector for connecting to the membrane. At least part of the membrane and main body are welded, wherein the membrane is at least partially applied to the at least one sector of the main body and a connection between the main body and membrane is sealed against the measuring medium.

Abstract: Disclosed is an apparatus for determining a process variable of a medium in a containment, comprising first and second oscillatory elements, first and second driving/receiving units, and electronics. The first driving/receiving unit is embodied to excite the first oscillatory element using a first electrical excitation signal to execute mechanical oscillations, and to receive the mechanical oscillations of the first oscillatory element and to convert such into a first electrical, received signal, wherein the second driving/receiving unit is embodied to excite the second oscillatory element by means of a second electrical excitation signal to execute mechanical oscillations, and to receive the mechanical oscillations of the second oscillatory element and to convert such into a second electrical, received signal, and wherein the electronics is embodied to determine the process variable from the first received signal and/or the second received signal.

Abstract: The present disclosure discloses a method for producing an ISE half-cell, including the steps of: immersing a first end of a hollow body into a membrane solution comprising at least one solvent and an ion-specific ionophore; removing the hollow body from the membrane solution; drying the hollow body and evaporating the solvent from the membrane solution, whereby an ion-selective membrane is created at the immersed end of the hollow body; and completing the hollow body to make an ISE half-cell. The present disclosure also discloses an ISE half-cell that is produced according to such a method. The present disclosure further discloses a sensor and a multiparameter sensor comprising several such ISE half-cells.

Abstract: The present disclosure relates to a method for producing an exchangeable electrode assembly, with at least one sensor body and at least a first electrode, for an electrochemical sensor for determining the concentration of an analyte in a gaseous or liquid measurement medium, a corresponding electrode assembly, and an electrochemical sensor with an electrode assembly according to the present disclosure. In order to produce the electrode assembly, the following method steps are performed: providing a sensor body, and applying at least a first electrically-conductive material to a first sub-region of the sensor body for producing a first electrode of the electrode assembly.

Abstract: Disclosed is an apparatus for determining a process variable of a medium in a containment, comprising first and second oscillatory elements, first and second driving/receiving units, and electronics. The first driving/receiving unit is embodied to excite the first oscillatory element using a first electrical excitation signal to execute mechanical oscillations, and to receive the mechanical oscillations of the first oscillatory element and to convert such into a first electrical, received signal, wherein the second driving/receiving unit is embodied to excite the second oscillatory element by means of a second electrical excitation signal to execute mechanical oscillations, and to receive the mechanical oscillations of the second oscillatory element and to convert such into a second electrical, received signal, and wherein the electronics is embodied to determine the process variable from the first received signal and/or the second received signal.

Abstract: The present disclosure relates to a method for calibrating an analytical measuring device in a measuring point, wherein the method comprises at least the following steps: closing the inlet valve so that no process medium is fed from the first inlet into the measuring point, emptying the measuring point of the process medium through the outlet valve, closing the outlet valve, feeding a predetermined volume of the calibration medium into the measuring point through the inlet valve from the second inlet, circulating the calibration medium through the pump so that the flow circuit is generated and the calibration medium flows against the analytical measuring device, wherein a predetermined flow velocity of the calibration medium is adjusted by the pump, and calibrating the analytical measuring device.

Abstract: A method for determining a chemical intake capacity of a process medium includes steps of providing a measuring point and an analytical measuring device, closing an outlet valve to the drain so that no process medium is discharged and closing the inlet valve so that no additional process medium is fed from the first inlet. The method includes circulating the analyte and process medium through the pump so the mixture flows into the analytical measuring device at a predetermined flow velocity. Further, the method includes detecting a measured value using the analytical measuring device until the measured value exceeds a limit value. The predetermined volumes are summed to form a total volume of the analyte, and a chemical intake capacity of the predetermined medium is determined based on the total volume of the analyte fed in.

Abstract: The invention relates to a method for calibrating an analytical measuring device in a measuring point. The method includes closing the outlet valve so that no process medium is discharged, closing the inlet valve so that no additional process medium is fed into the measuring point and a volume of process medium is in the measuring point, feeding a predetermined volume of the calibration medium into the measuring point, circulating the calibration medium by means of the pump so that the flow circuit is generated and the calibration medium flows against the analytical measuring device, detecting a first measured for a calibration, repeating the steps of feeding the calibration medium into the measuring point, circulating the calibration medium, and detecting a measured value for the calibration, and evaluating the measured values and performing the calibration.

Abstract: The present disclosure relates to a method for manufacturing a sensor cap with at least one main body and a membrane for an optochemical or electrochemical sensor for determining and/or monitoring the concentration of an analyte in a measuring medium, a corresponding sensor cap, and a corresponding sensor. In one aspect of the present disclosure, a permeable membrane is provided with a surface for contacting the measuring medium, as well as a main body with at least one sector for connecting to the membrane. At least part of the membrane and main body are welded, wherein the membrane is at least partially applied to the at least one sector of the main body and a connection between the main body and membrane is sealed against the measuring medium.

Abstract: The present disclosure relates to a method for manufacturing a sensor cap with at least one main body and a membrane for an optochemical or electrochemical sensor for determining and/or monitoring the concentration of an analyte in a measuring medium, a corresponding sensor cap, and a corresponding sensor. In one aspect of the present disclosure, a permeable membrane is provided with a surface for contacting the measuring medium, as well as a main body with at least one sector for connecting to the membrane. At least part of the membrane and main body are welded, wherein the membrane is at least partially applied to the at least one sector of the main body and a connection between the main body and membrane is sealed against the measuring medium.

Abstract: The present disclosure relates to a sensor for determining measured values of a measured variable representing an analyte content in a measuring fluid, comprising a measuring probe with a probe housing that comprises an immersion region provided for immersion into the measuring fluid, and a single-layer or multi-layer membrane arranged in the immersion region, wherein the membrane comprises at least a first layer that is formed from a polymer and comprises a superhydrophobic surface that is in contact with the measuring fluid when the immersion region is immersed in the measuring fluid.

Abstract: The present disclosure relates to a measuring probe for measuring a concentration of an analyte in a measuring medium represented by a measured variable, including a probe housing having a first housing part and a second housing part, the first housing part being cap shaped closed on a front end by a sensor membrane and detachably connected to the second housing part on a rear end opposite the front end, such that the second housing part closes the cap at the rear end, and the first and the second housing parts define a probe interior sealed by the sensor membrane, a fluid electroyte contained within the probe interior, an overflow channel in communication with the probe interior, and a seal adjacent the probe interior so as to seal the probe interior from the exterior of the measurement probe and simultaneously seal off the overflow channel.

Abstract: The present disclosure relates to an amperometric sensor for determining measurement values of a measurand representing a chlorine dioxide content of a measuring fluid, the sensor including a sensor housing in which a housing chamber is formed, a membrane sealing the housing chamber, a working electrode arranged within the housing chamber, a counter electrode arranged within the housing chamber, an inner electrolyte contained in the housing chamber and in contact with the membrane, the working electrode and the counter electrode, the inner electrolyte having a pH value between 3.5 and 9, inclusive, and a pH buffer stabilizing the inner electrolyte. The sensor further includes a measurement circuit electrically connected with the working electrode and the counter electrode and configured to apply a predetermined, constant voltage between the working electrode and the counter electrode and to generate at least one measurement signal representing a measurement value of the measurand.

Abstract: The present disclosure relates to a method for operating an amperometric sensor for detecting measured values of at least one first measurand that represents a concentration of a first analyte in a measuring fluid, and of at least one second measurand which represents a concentration of a second analyte different from the first analyte. The method includes steps of detecting measured values of the first measurand in a first operating mode of the amperometric sensor, switching the amperometric sensor to a second operating mode different from the first operating mode, and detecting measured values of the second measurand in the second operating mode of the amperometric sensor. The method can be used in monitoring the water quality in drinking water installations or drinking water networks.

Abstract: The present disclosure relates to a sensor for measuring a concentration of an ion dissolved in a measuring solution, comprising a plurality of ion-selective electrodes each having a sensitive surface for contact with the measuring solution, wherein the electrodes comprise consumed and unconsumed electrodes, a reference electrode for contact with the measuring solution, wherein a measured value of an electrical voltage between one of the unconsumed electrodes and the reference electrode is a measure of the concentration of the ion dissolved in the measuring solution, and a measuring transducer for determining the measured value of the voltage and for converting the measured value into a concentration of the ion. The measuring transducer has a switching unit to activate an unconsumed electrode and to deactivate all other electrodes, and the sensitive surfaces of unconsumed electrodes each have a cover covering the sensitive surface against the measuring solution in a medium-tight manner.

Abstract: The present disclosure discloses a method for producing an ISE half-cell, including the steps of: immersing a first end of a hollow body into a membrane solution comprising at least one solvent and an ion-specific ionophore; removing the hollow body from the membrane solution; drying the hollow body and evaporating the solvent from the membrane solution, whereby an ion-selective membrane is created at the immersed end of the hollow body; and completing the hollow body to make an ISE half-cell. The present disclosure also discloses an ISE half-cell that is produced according to such a method. The present disclosure further discloses a sensor and a multiparameter sensor comprising several such ISE half-cells.

Abstract: The present disclosure relates to a sensor for determining measured values of a measured variable representing an analyte content in a measuring fluid, comprising a measuring probe with a probe housing that comprises an immersion region provided for immersion into the measuring fluid, and a single-layer or multi-layer membrane arranged in the immersion region, wherein the membrane comprises at least a first layer that is formed from a polymer and comprises a superhydrophobic surface that is in contact with the measuring fluid when the immersion region is immersed in the measuring fluid.

Abstract: The present disclosure relates to an amperometric sensor for determining measurement values of a measurand representing a chlorine dioxide content of a measuring fluid, the sensor including a sensor housing in which a housing chamber is formed, a membrane sealing the housing chamber, a working electrode arranged within the housing chamber, a counter electrode arranged within the housing chamber, an inner electrolyte contained in the housing chamber and in contact with the membrane, the working electrode and the counter electrode, the inner electrolyte having a pH value between 3.5 and 9, inclusive, and a pH buffer stabilizing the inner electrolyte. The sensor further includes a measurement circuit electrically connected with the working electrode and the counter electrode and configured to apply a predetermined, constant voltage between the working electrode and the counter electrode and to generate at least one measurement signal representing a measurement value of the measurand.

Abstract: The present disclosure relates to a measuring probe for measuring a concentration of an analyte in a measuring medium represented by a measured variable, including a probe housing having a first housing part and a second housing part, the first housing part being cap shaped closed on a front end by a sensor membrane and detachably connected to the second housing part on a rear end opposite the front end, such that the second housing part closes the cap at the rear end, and the first and the second housing parts define a probe interior sealed by the sensor membrane, a fluid electroyte contained within the probe interior, an overflow channel in communication with the probe interior, and a seal adjacent the probe interior so as to seal the probe interior from the exterior of the measurement probe and simultaneously seal off the overflow channel.

Abstract: The present disclosure relates to a method for manufacturing a sensor cap with at least one main body and a membrane for an optochemical or electrochemical sensor for determining and/or monitoring the concentration of an analyte in a measuring medium, a corresponding sensor cap, and a corresponding sensor. In one aspect of the present disclosure, a permeable membrane is provided with a surface for contacting the measuring medium, as well as a main body with at least one sector for connecting to the membrane. At least part of the membrane and main body are welded, wherein the membrane is at least partially applied to the at least one sector of the main body and a connection between the main body and membrane is sealed against the measuring medium.