Mettler-toledo Ag

Mettler-toledo Gmbh

Philippe Ehrismann

Corrado Barcella

Andreas Rutz

Rolf Thrier

Wolfgang Haller

Juan Limon Petersen

Jean-Nicolas Adami

Markus Bernasconi

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.

Measurement unit for an ion-sensitive solid-state electrode and ion-sensitive electrode

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.

Protective device for electrochemical electrodes having a liquid junction

A method of monitoring an electrochemical second order half-cell () is provided, as is a measuring probe with at least one electrochemical second order half-cell (), a control- and/or regulation unit () to close an electrochemical contact between the half-cell and a measuring medium (), and with at least one temperature sensor (). The half-cell includes an electrolyte () and a first conductor element () in contact with the electrolyte and which holds a first electrical potential (E). The half-cell also has a second conductor element () in contact with the electrolyte, the second conductor holding a second electrical potential (E). The two conductor elements () comprise the same metal. The first conductor element has a coating () 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.

Method of monitoring an electrochemical half-cell

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.

Polymer electrolyte, half-cell for electrochemical measurements, as well as the use thereof

A reference electrode for potentiometric measurements has a housing () with a hollow space () containing a liquid reference electrolyte () as well as a conductor element () immersed in the reference electrolyte. In addition, the housing has a diaphragm () through which the reference electrolyte can be brought into contact with a measuring medium () outside of the housing. Furthermore, means are provided to effect an outflow of the reference electrolyte through the diaphragm. A first electrical contact element () 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 () of the reference electrolyte does not fall below a threshold value (F), and that the contact element is not immersed in the reference electrolyte if the fill level falls short of the threshold value.

Reference electrode for potentiometric measurements, and method of monitoring the reference electrode

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 ORand NRR, in which R, Rand Rare selected from the group comprising hydrogen, methyl, and ethyl, on the condition that the substituted alkyl group contains the substituent OH at most once.

Polymer electrolyte, half cell for electrochemical measurements, and the use thereof

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

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Uster, Switzerland

Philippe Ehrismann