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: 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: An electrochemical sensor, used with a measuring medium, has a sensor head (1), a sensor chip (6, 606) with a sensitive region (632), a sensor body (2) with an end piece (3, 503), a sealing means (10, 510, 610) and a pressing element (18, 618). The sensor body is connected to the sensor head. The end piece is hollow with a closed end region and a measuring opening (4, 504) that allows the measuring medium to contact the sensitive region, which is inside the end piece during operation. The sealing means surrounds the measuring opening, other than the sensitive region, and seals the inside of the end piece from the measuring medium during operation. The pressing element biases the sensor chip against the sealing means and the edge of the measuring opening. The end piece has an integral, gap-free design in the region that contacts the measuring medium during operation.

Abstract: An electrochemical sensor, used with a measuring medium, has a sensor head (1), a sensor chip (6, 606) with a sensitive region (632), a sensor body (2) with an end piece (3, 503), a sealing means (10, 510, 610) and a pressing element (18, 618). The sensor body is connected to the sensor head. The end piece is hollow with a closed end region and a measuring opening (4, 504) that allows the measuring medium to contact the sensitive region, which is inside the end piece during operation. The sealing means surrounds the measuring opening, other than the sensitive region, and seals the inside of the end piece from the measuring medium during operation. The pressing element biases the sensor chip against the sealing means and the edge of the measuring opening. The end piece has an integral, gap-free design in the region that contacts the measuring medium during operation.