Reference electrode, measuring system with a reference electrode and method for producing a reference electrode

Eine Referenzelektrode (10) besteht aus einem Gehäuse (II) aus einem gasdichten Material, welches teilweise mit einem gel- oder pastenförmigen Elektrolyten (12) befüllt ist. Der Elektrolyt (R) ist über ein Diaphragma (13) im Gehäuse (11) in Kontakt mit einem Messmedium (M) bringbar. Im Gehäuse (11) ist in Kontakt mit dem Elektrolyten (12) ein Hohlraum (14) angeordnet. Der Hohlraum (14) ist gasdicht verschlossen. Im Gehäuse sind Mittel (15) zum Erzeugen eines Überdrucks im Hohlraum (14) angeordnet. An electrochemical sensor has a reference electrode (10) with a gas-tight housing (11) packed with a gel or paste electrolyte (12). The electrolyte may be brought into contact with a measuring medium (M) in the housing via a diaphragm. The housing has a gas-tight hollow space (14) in contact with the electrolyte (12). The housing has a chemical system to raise pressure in the hollow chamber by release of gas. An electrochemical sensor has a reference electrode (10) with a gas-tight housing (11) packed with a gel or paste electrolyte (12). The electrolyte may be brought into contact with a measuring medium (M) in the housing via a diaphragm. The housing has a gas-tight hollow space (14) in contact with the electrolyte (12). The housing has a chemical system to raise pressure in the hollow chamber by release of gas. The system may be activated by thermal, electrical or electromagnetic energy to raise pressure by 0.5 to 2 bar. The gas released is a non-toxic inert gas e.g. CO2 or N2. The system is activated at 100-400 degrees C. The chemical system is diphenyl-triacene or organic carbonic acid e.g. Di-carbonic acid, such as malonic acid, and is mixed with the electrolyte (12). An Independent claim is included for a process for making the reference electrode in a housing (11) with a gas-tight material e.g. glass or plastic.