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: 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: A fluid guiding module includes a housing having a sensor chamber having first and second chamber ends. The fluid guiding module includes a first connection region for connecting to a second fluid guiding module. The first connection is located on a first outer side of the housing and has a first redirection channel having first and second redirection channel ends. A chamber inlet channel fluidly couples the first redirection channel end to the first chamber end of the sensor chamber. The first redirection channel is adapted to be fluidly coupled to a chamber outlet channel of the second fluid guiding module.

Abstract: The present disclosure includes a retractable assembly for immersion, flow and mounted measuring systems in analytical process technology, comprising: an essentially cylindrical housing with a housing interior; a dip tube which can be moved axially in the housing interior between a service position and a process position by means of supply energy, in particular compressed air; and an acceleration sensor. The present disclosure also includes a method for detecting a movement of the dip tube.

Abstract: The present disclosure relates to a sensor and sensor mounting comprising a housing having an end section, wherein the end section is designed for mounting of the sensor. First communication capabilities are arranged in the housing and are designed for the wireless transmission of power to the sensor and for the wireless transmission and reception of data to and from the sensor. First retaining capabilities are designed to hold the sensor in the end section, and connecting capabilities, which are connected at least to the communication capabilities, are designed to connect the sensor mounting to a superordinate unit.

Abstract: A flow-through measuring station includes at least one flow cell having a fluid channel. The fluid channel has a fluid inlet and a fluid outlet and is configured to conduct a liquid medium. One or more flow cells each include at least one sensor configured to be contacted with the medium and to determine at least one respective media property. At least one illumination unit is configured to indicate a respective state of at least one sensor. The measuring station also includes a transmitter/measuring transducer which is configured to operate the at least one sensor and the at least one illumination unit, and to determine in each case a state of at least one sensor.

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 retractable assembly for immersion, flow and attachment measuring systems in analytical process technology that includes an essentially hollow cylindrically shaped housing having a service chamber formed in its interior, where the housing includes an encircling groove open to its interior, where the groove includes an expansion space expanding the groove, where the expansion space is arranged on the side of the groove facing away from the interior, and where the housing includes a leakage path, which connects the expansion space with the environment.

Abstract: The present disclosure relates to a molded seal for sealing an annular gap between an outer peripheral wall and an inner peripheral wall against a medium, including at least a first annular sealing body portion, facing the medium, to be placed between the outer and inner walls, and a second annular sealing body portion, facing away from the medium, to be placed between the outer and inner walls. The second sealing body portion facing the inner wall includes an annular cavity and at least one groove on its end face facing away from medium, where the cavity and groove are connected to each other. Moreover, the present disclosure relates to a fitting comprising such a molded seal.

Abstract: The present disclosure relates to a retractable assembly for immersion, flow and attachment measuring systems in analytical process technology that includes an essentially hollow cylindrically shaped housing having a service chamber formed in its interior, where the housing includes an encircling groove open to its interior, where the groove includes an expansion space expanding the groove, where the expansion space is arranged on the side of the groove facing away from the interior, and where the housing includes a leakage path, which connects the expansion space with the environment.

Abstract: A tool and a retractable assembly for measuring at least one measured variable of a medium in a containment, comprising: an essentially cylindrical housing; an immersion tube, which is movable axially in the housing between a service position run out from the medium and a process position run into the medium; and an engagement apparatus secured on the housing; wherein a movable piston is provided in the engagement apparatus and at least a first position and a second position of the piston are provided. The engagement apparatus holds the immersion tube in the service position when the piston is located in the first position, especially when no energy supply is present, and the engagement apparatus holds the immersion tube in an intermediate position between the service position and the process position and prevents further movement of the immersion tube in the direction of the medium when the piston is located in the second position.

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 retractable assembly and a sealing system, the sealing system comprising: an essentially hollow, cylindrical housing with an inner space and a peripheral groove open to the inner space in the housing. The peripheral groove defines a plane in the housing and the normal of the plane is parallel to the longitudinal axis of the housing. The groove includes at least one, preferably two, extension spaces expanding the groove. The extension space is arranged on the side of the groove facing away from the inner space. An annular seal corresponding to the groove is arranged in the groove. The annular seal is formed of at least a first section facing the inner space and a second section facing away from the inner space.

Abstract: A probe system, including: a connector apparatus; a treatment chamber part having at least one treatment medium supply line communicating with the treatment chamber; a measuring head seated so as to be axially shiftable, and a treatment position, wherein the immersion tube, on its connector apparatus-side front end, has a front-end closed, protective cylinder, and is arranged in a section of the immersion tube, so that, in the measuring position of the immersion tube, the measuring head is contactable via perforations with the process medium, and in the treatment position of the immersion tube, is contactable with the treatment medium; and a drive system for axial shifting of the immersion tube, arranged on the end region of the probe system facing away from the connector apparatus. The treatment chamber part is surrounded by a support structure connected with the connector apparatus and with the drive system.

Abstract: A retractable assembly for immersion-, flow- or add-on measuring systems in analytical process technology for measuring at least one measured variable of a medium in a containment, comprising: an essentially cylindrical housing; an immersion tube, which is movable axially in the housing between a service position out of the medium and a process position in the medium; and a sensor for measuring the measured variable. The sensor is arranged in the immersion tube, wherein the sensor protrudes at least sectionally out of the immersion tube at the end of the immersion tube remote from the medium; and an openable and closable cover, which surrounds at least the section of the sensor protruding out of the immersion tube. The sensor in the opened state of the cover is mountable and demountable, respectively, in and from the immersion tube.

Abstract: A retractable assembly for immersion-, flow- or add-on measuring systems in analytical process technology for measuring at least one measured variable of a medium in a containment, comprising: an essentially cylindrical housing; an immersion tube, which is movable axially in the housing between a service position out of the medium and a process position in the medium; and a sensor for measuring the measured variable. The sensor is arranged in the immersion tube, wherein the sensor protrudes at least sectionally out of the immersion tube at the end of the immersion tube remote from the medium; and an openable and closable cover, which surrounds at least the section of the sensor protruding out of the immersion tube. The sensor in the opened state of the cover is mountable and demountable, respectively, in and from the immersion tube.

Abstract: A retractable assembly, comprising: a housing; a media connection with complementary connecting means; an immersion tube; and a probe provided in the immersion tube. The probe has a probe head on its end facing the medium, wherein, in the service position, the probe head is arranged within a treatment chamber formed in the housing, wherein the immersion tube is divided into three regions, and, indeed, a upper region facing away from the containment, a middle region, on which a sealing system is provided, and a lower region facing the containment, wherein the sealing system is so embodied that in no position of the immersion tube does an exchange of medium or impurities from the drive to the treatment chamber, or vice versa, occur.

Abstract: A retractable assembly and a sealing system, the sealing system comprising: an essentially hollow, cylindrical housing with an inner space and a peripheral groove open to the inner space in the housing. The peripheral groove defines a plane in the housing and the normal of the plane is parallel to the longitudinal axis of the housing. The groove includes at least one, preferably two, extension spaces expanding the groove. The extension space is arranged on the side of the groove facing away from the inner space. An annular seal corresponding to the groove is arranged in the groove. The annular seal is formed of at least a first section facing the inner space and a second section facing away from the inner space.

Abstract: A tool and a retractable assembly for measuring at least one measured variable of a medium in a containment, comprising: an essentially cylindrical housing; an immersion tube, which is movable axially in the housing between a service position run out from the medium and a process position run into the medium; and an engagement apparatus secured on the housing; wherein a movable piston is provided in the engagement apparatus and at least a first position and a second position of the piston are provided. The engagement apparatus holds the immersion tube in the service position when the piston is located in the first position, especially when no energy supply is present, and the engagement apparatus holds the immersion tube in an intermediate position between the service position and the process position and prevents further movement of the immersion tube in the direction of the medium when the piston is located in the second 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