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.

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.

An electrochemical sensor for humoral detection and a detection device. The electrochemical sensor for humoral detection includes a material layer including at least one hydrophilic region; and at least one detection unit, located in the hydrophilic region. The hydrophilic region includes a sampling port configured to be in contact with a liquid sample (for example, saliva) to be detected, the detection unit includes a working electrode and an opposed electrode disposed apart from each other, the working electrode comprises a reaction surface containing a substance configured to have a reaction with an analyte in the liquid sample, and the working electrode and the opposed electrode are configured to detect an electrical signal generated by the reaction so as to detect the analyte.

An electrochemical sensor for humoral detection and a detection device. The electrochemical sensor for humoral detection includes a material layer including at least one hydrophilic region; and at least one detection unit, located in the hydrophilic region. The hydrophilic region includes a sampling port configured to be in contact with a liquid sample (for example, saliva) to be detected, the detection unit includes a working electrode and an opposed electrode disposed apart from each other, the working electrode comprises a reaction surface containing a substance configured to have a reaction with an analyte in the liquid sample, and the working electrode and the opposed electrode are configured to detect an electrical signal generated by the reaction so as to detect the analyte.

A reference electrode system for a pH-sensor system includes: a first junction having a membrane with a sealed side; a reference electrode, the reference electrode and/or an electrically conducting wire of the reference electrode being covered completely except for an end portion of the reference electrode, by a sleeve; and a tube that is arranged, at least partly, around the reference electrode, the electrically conducting wire, and the sleeve, the tube having a closed end which is arranged near the end portion of the reference electrode.

A single-use disposable potentiometric reference sensor includes an insulating base substrate, a reference electrode disposed on the insulating base substrate where the reference electrode is a silver-silver chloride electrode, an internal layer disposed on the reference electrode where the internal layer is an amorphous salt layer that includes an amorphous polysaccharide and a salt having equi-mobility cations and anions, and a semipermeable cover membrane disposed over the internal layer where the semipermeable cover membrane has water vapor and ion permeability.

A single-use disposable potentiometric reference sensor includes an insulating base substrate, a reference electrode disposed on the insulating base substrate where the reference electrode is a silver-silver chloride electrode, an internal layer disposed on the reference electrode where the internal layer is an amorphous salt layer that includes an amorphous polysaccharide and a salt having equi-mobility cations and anions, and a semipermeable cover membrane disposed over the internal layer where the semipermeable cover membrane has water vapor and ion permeability.

An electrochemical sensor for humoral detection and a detection device. The electrochemical sensor for humoral detection includes a material layer including at least one hydrophilic region; and at least one detection unit, located in the hydrophilic region. The hydrophilic region includes a sampling port configured to be in contact with a liquid sample (for example, saliva) to be detected, the detection unit includes a working electrode and an opposed electrode disposed apart from each other, the working electrode comprises a reaction surface containing a substance configured to have a reaction with an analyte in the liquid sample, and the working electrode and the opposed electrode are configured to detect an electrical signal generated by the reaction so as to detect the analyte.

An electrochemical sensor for humoral detection and a detection device. The electrochemical sensor for humoral detection includes a material layer including at least one hydrophilic region; and at least one detection unit, located in the hydrophilic region. The hydrophilic region includes a sampling port configured to be in contact with a liquid sample (for example, saliva) to be detected, the detection unit includes a working electrode and an opposed electrode disposed apart from each other, the working electrode comprises a reaction surface containing a substance configured to have a reaction with an analyte in the liquid sample, and the working electrode and the opposed electrode are configured to detect an electrical signal generated by the reaction so as to detect the analyte.

The present invention provides an electrolyte measuring device that makes it possible to detect failure in the device with a high degree of accuracy. The electrolyte measuring device has: an ion-selective electrode to which an ion solution including ions is supplied; a reference electrode; a measurement section to measure a potential difference between the ion-selective electrode and the reference electrode; and a current measurement section to measure an electric current flowing in the reference electrode.