Abstract: Measurement unit for an ion-sensitive solid-state electrode, that serves to measure pH in a measurement solution, with a layered structure including an ion-sensitive glass layer with a first ring-shaped contact surface, an electrically conducting layer that directly or via at least one intermediate layer adheres to the ion-sensitive glass layer, and a substrate that adheres to the electrically conducting layer and is provided with a second ring-shaped contact surface; and with a holding member that is provided with a first ring-shaped sealing surface, a second ring-shaped sealing surface, and an annular section; wherein the first ring-shaped sealing surface is sealingly connected to the first ring-shaped contact surface, wherein the second ring-shaped sealing surface is connected to the second ring-shaped contact surface of the substrate, and wherein the first and second ring-shaped sealing surfaces of the holding member are sealingly connected by the annular section.

Abstract: A protective device is disclosed for electrochemical electrodes having a liquid junction, and a transport and retention system therefor. The protective device can include a casing which is configured as a hollow cylinder and which has a inner circumferential first protrusion; a delimiting device which together with the first protrusion delimits a first casing segment having a first inner diameter; a spacer, which is configured as a hollow cylinder having an outer diameter corresponding to the first inner diameter; and a first sealing ring and a second sealing ring between which the spacer is disposed; wherein the first sealing ring, the second sealing ring and the spacer are disposed in an interior of the first casing segment, so that the first sealing ring and the second seal ring delimit a first protection space for a liquid junction whose inner diameter corresponds to an inner diameter of the spacer.

Abstract: Measurement unit for an ion-sensitive solid-state electrode, that serves to measure pH in a measurement solution, with a layered structure including an ion-sensitive glass layer with a first ring-shaped contact surface, an electrically conducting layer that directly or via at least one intermediate layer adheres to the ion-sensitive glass layer, and a substrate that adheres to the electrically conducting layer and is provided with a second ring-shaped contact surface; and with a holding member that is provided with a first ring-shaped sealing surface, a second ring-shaped sealing surface, and an annular section; wherein the first ring-shaped sealing surface is sealingly connected to the first ring-shaped contact surface, wherein the second ring-shaped sealing surface is connected to the second ring-shaped contact surface of the substrate, and wherein the first and second ring-shaped sealing surfaces of the holding member are sealingly connected by the annular section.

Abstract: An ion-sensitive electrode, that serves to measure an ion activity in a measurement solution, in particular a pH value, is configured with a layered structure including a glass layer as ion-sensitive glass membrane, and a substrate as first holding member, which directly or via at least one intermediate layer adheres to the ion-sensitive glass membrane, wherein the ion-sensitive glass membrane is held under compressive stress by the first holding member over the whole range or part of the range of the specified operating temperature of the ion-sensitive electrode.

Abstract: A protective device is disclosed for electrochemical electrodes having a liquid junction, and a transport and retention system therefor. The protective device can include a casing which is configured as a hollow cylinder and which has a inner circumferential first protrusion; a delimiting device which together with the first protrusion delimits a first casing segment having a first inner diameter; a spacer, which is configured as a hollow cylinder having an outer diameter corresponding to the first inner diameter; and a first sealing ring and a second sealing ring between which the spacer is disposed; wherein the first sealing ring, the second sealing ring and the spacer are disposed in an interior of the first casing segment, so that the first sealing ring and the second seal ring delimit a first protection space for a liquid junction whose inner diameter corresponds to an inner diameter of the spacer.

Abstract: Method and system of monitoring a measuring probe which is in contact with a measurement medium and registers a measurement value of the measurement medium, wherein the method comprises determining and evaluating time-dependent values of a first and a second parameter, wherein the first parameter responds faster than the second parameter to changes in a process to which the measurement medium is subjected, and wherein both of the parameters are probe-specific parameters.

Abstract: A sensor unit for attachment to a container such as a bag or other vessel used to retain material includes a clamping mechanism for attaching the sensor unit to the container. The clamping mechanism may be configured to break or provide an indication that the connection between the sensor and container has broken that is visually detectable before a leak of material occurs or is detectable by a person visually monitoring the container or sensor. Such an indication can also indicate that the sensor was previously used and should not be used again for single use applications. Such a visual indicator is separate and different from seeing an actual leak and permits an event that may desterilize material within the container or lead to other problems to be corrected prior to use of a single use reaction system.

Abstract: A method of monitoring an electrochemical second order half-cell (1, 101) is provided, as is a measuring probe with at least one electrochemical second order half-cell (101), a control- and/or regulation unit (7) to close an electrochemical contact between the half-cell and a measuring medium (8), and with at least one temperature sensor (9, 10). The half-cell includes an electrolyte (4) and a first conductor element (2) in contact with the electrolyte and which holds a first electrical potential (E1). The half-cell also has a second conductor element (3) in contact with the electrolyte, the second conductor holding a second electrical potential (E2). The two conductor elements (2, 3) comprise the same metal. The first conductor element has a coating (6) of a low-solubility salt of the same metal. The control- and/or regulation unit includes a program for executing a method of monitoring the electrochemical half-cell.

Abstract: Method and system of monitoring a measuring probe which is in contact with a measurement medium and registers a measurement value of the measurement medium, wherein the method comprises determining and evaluating time-dependent values of a first and a second parameter, wherein the first parameter responds faster than the second parameter to changes in a process to which the measurement medium is subjected, and wherein both of the parameters are probe-specific parameters.

Abstract: A polymer electrolyte for an electrochemical half-cell, such as a reference half-cell, contains a polymer which can be produced by polymerization of N-acryloyl-amino-ethoxy-ethanol or by co-polymerization of N-acryloyl-amino-ethoxy-ethanol with at least one further monomer component.

Abstract: A reference electrode for potentiometric measurements has a housing (2) with a hollow space (4) containing a liquid reference electrolyte (6) as well as a conductor element (8) immersed in the reference electrolyte. In addition, the housing has a diaphragm (12) through which the reference electrolyte can be brought into contact with a measuring medium (10) outside of the housing. Furthermore, means are provided to effect an outflow of the reference electrolyte through the diaphragm. A first electrical contact element (20, 36) is arranged in the hollow space in such a manner that the contact element is immersed in the reference electrolyte as long as the fill level (18) of the reference electrolyte does not fall below a threshold value (FS), and that the contact element is not immersed in the reference electrolyte if the fill level falls short of the threshold value.

Abstract: A method of monitoring an electrochemical second order half-cell (1, 101) is provided, as is a measuring probe with at least one electrochemical second order half-cell (101), a control- and/or regulation unit (7) to close an electrochemical contact between the half-cell and a measuring medium (8), and with at least one temperature sensor (9, 10). The half-cell includes an electrolyte (4) and a first conductor element (2) in contact with the electrolyte and which holds a first electrical potential (E1). The half-cell also has a second conductor element (3) in contact with the electrolyte, the second conductor holding a second electrical potential (E2). The two conductor elements (2, 3) comprise the same metal. The first conductor element has a coating (6) of a low-solubility salt of the same metal. The control- and/or regulation unit includes a program for executing a method of monitoring the electrochemical half-cell.

Abstract: A polymer electrolyte for an electrochemical half cell, in particular for a reference half cell, contains a polymer which as a first monomer component contains at least one alkyl methacrylate. The alkyl methacrylate has a substituted alkyl group with from three to seven carbon atoms and at least two substituents. The aforementioned substituents are selected from the group comprising OR1 and NR2R3, in which R1 , R2 and R3 are selected from the group comprising hydrogen, methyl, and ethyl, on the condition that the substituted alkyl group contains the substituent OH at most once.

Abstract: An insertion electrode device (1) is designed for installing a probe (2) in a medium to be measured, through a receptacle or a fitting (3) in the receptacle. The probe comprises a probe head (10) at an end opposite the measuring end of the probe. The fitting or the receptacle has an internal shoulder (34). In the probe's installed state, the internal shoulder serves as stop for the probe head. A spacer ring (33) and a sealing ring (36) are arranged along a shaft of the probe between the probe head and the internal shoulder. The spacer ring has a profile which, together with the probe shaft, forms a groove (37), In the installed state of the probe, the groove completely accommodates and compresses the sealing ring.

Abstract: A polymer electrolyte for an electrochemical half cell, in particular for a reference half cell, contains a polymer which as a first monomer component contains at least one alkyl methacrylate. The alkyl methacrylate has a substituted alkyl group with from three to seven carbon atoms and at least two substitutents. The aforementioned substitutents are selected from the group comprising OR1 and NR2R3, in which R1, R2 and R3 are selected from the group comprising hydrogen, methyl, and ethyl, on the condition that the substituted alkyl group contains the substitutent OH at most once.

Abstract: A measuring probe for potentiometric measurements has a housing (2) formed of an electrically insulating material that encloses at least one hollow space (8, 10) containing a half-cell element defining a first electrode. At least one additional electrode (12) is provided on a portion (4) of the housing adapted for immersion in a measuring solution (6) and is connected to a contact terminal (K3) that is arranged outside of the immersible portion (4). Each additional electrode (12) is defined by an electrically conductive coating (14) applied to the outside of the housing (2).

Abstract: A polymer electrolyte for an electrochemical half-cell, such as a reference half-cell, contains a polymer which can be produced by polymerization of N-acryloyl-amino-ethoxy-ethanol or by co-polymerization of N-acryloyl-amino-ethoxy-ethanol with at least one further monomer component.

Abstract: A reference electrode for potentiometric measurements has a housing (2) with a hollow space (4) containing a liquid reference electrolyte (6) as well as a conductor element (8) immersed in the reference electrolyte. In addition, the housing has a diaphragm (12) through which the reference electrolyte can be brought into contact with a measuring medium (10) outside of the housing. Furthermore, means are provided to effect an outflow of the reference electrolyte through the diaphragm. A first electrical contact element (20, 36) is arranged in the hollow space in such a manner that the contact element is immersed in the reference electrolyte as long as the fill level (18) of the reference electrolyte does not fall below a threshold value (FS), and that the contact element is not immersed in the reference electrolyte if the fill level falls short of the threshold value.

Abstract: A measuring probe for potentiometric measurements has a housing (2) formed of an electrically insulating material that encloses at least one hollow space (8, 10) containing a half-cell element defining a first electrode. At least one additional electrode (12) is provided on a portion (4) of the housing adapted for immersion in a measuring solution (6) and is connected to a contact terminal (K3) that is arranged outside of the immersible portion (4). Each additional electrode (12) is defined by an electrically conductive coating (14) applied to the outside of the housing (2).

Abstract: A polymer electrolyte for an electrochemical half cell, in particular for a reference half cell, contains a polymer which as a first monomer component contains at least one alkyl methacrylate. The alkyl methacrylate has a substituted alkyl group with from three to seven carbon atoms and at least two substituents. The aforementioned substituents are selected from the group comprising OR1 and NR2R3, in which R1, R2 and R3 are selected from the group comprising hydrogen, methyl, and ethyl, on the condition that the substituted alkyl group contains the substituent OH at most once.