Mettler-toledo Gmbh

Andreas Rutz

Juan Limon Petersen

Daniel Zwahlen

Philippe Ehrismann

Corrado Barcella

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 measuring element is disclosed for an ion-sensitive solid-contact electrode for measuring ion activity in a measurement medium. An ion-sensitive solid-contact electrode having such a measuring element and an electrochemical sensor having such a solid-contact electrode are also disclosed. The measuring element can include an ion-sensitive layer arranged to contact a measurement medium when in operation, and conductive to lithium ions; and a single-phase electrically conductive layer, which includes metallic lithium or a lithium-(0)-alloy. A solid-state electrolyte layer can be arranged between the ion-sensitive layer and the electrically conductive layer.

Measuring element for anion-sensitive solid-contact electrode and ion-sensitive solid-contact electrode

An electrochemical sensor for potentiometric measurements in a measurement medium has a sensor head () at an end of a longitudinal sensor body (). A sensing electrode () and a reference electrode () are disposed within the longitudinal sensor body. A liquid junction () is established between the reference electrode and the sensing electrode. The sensor is characterized by a protective outer shaft () into which a polymeric tube-like structure () is disposed, electrically isolating the protective outer shaft from a reference electrolyte.

Electrochemical sensor

An electrochemical sensor () has a sensor element () with a measuring surface () that faces a measuring medium () during use. The sensor element has a planar measuring element (). A sensor shaft () has an aperture () with a bezel () at an end which, during use, faces the measuring medium. The sensor element is installed in the area of the aperture. The electrochemical sensor also has an annular sealing element (), which is arranged between the sensor element and the bezel. An insulator element () is firmly and inseparably connected to the measuring element, exposing or recessing the measuring surface. Thus, the sealing element, which protects the electrochemical sensor against the ingress of measuring medium, is arranged sealingly between the insulator element and the bezel.

An electrochemical sensor for potentiometric measurements in a measurement medium has a sensor head () at an end of a longitudinal sensor body (). A sensing electrode () and a reference electrode () are disposed within the longitudinal sensor body. A liquid junction () is established between the reference electrode and the sensing electrode. The sensor is characterized by a protective outer shaft () with a polymeric sensor sleeve (), which is electrically isolating, disposed within the protective outer shaft.

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Zurich, Switzerland

Andreas Rutz