Potentiometric Gas Sensor

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This patent describes a potentiometric gas sensor featuring a measuring electrode and a reference electrode separated by a porous matrix containing an ionic liquid as an electrolyte. When the measuring electrode contacts a target gas, an electrical voltage arises between the electrodes, which depends on the gas concentration. Thus, the gas concentration can be determined by measuring this voltage. The invention also covers a method for determining a gas concentration using this sensor, which is designed to be small, sensitive, cost-effective, and able to operate at room to moderate temperatures.

Use CasesContent extracted from patent full text and abstract with AI.

• Monitoring oxygen concentration in industrial processes or laboratories
• Environmental air quality monitoring (e.g., oxygen, hazardous gases)
• Medical devices that monitor respiratory gases or anesthetic gases
• Combustion control in automotive or power plant applications
• Incorporation into portable gas detection tools for workplace safety
• Process control in chemical and manufacturing industries

BenefitsContent extracted from patent full text and abstract with AI.

• Enables sensitive and accurate measurement of gas concentrations with minimal equipment (only two electrodes needed)
• Simple and potentially low-cost manufacturing process using thin-film techniques
• Small and compact sensor design allows miniaturization and integration into portable devices
• Works efficiently at room and moderate temperatures (20°C to 150°C), enhancing versatility
• High reproducibility and stability, especially when a metal/metal oxide reference is used
• Lower drift than conventional air-reference cells, improving long-term reliability
• Potential for multi-gas detection with suitable electrode/material choices

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

Die Erfindung betrifft einen potentiometrischer Gassensor (10) aufweisend eine Messelektrode (20) und eine Referenzelektrode (30), eine zwischen der Messelektrode (20) und der Referenzelektrode (30) angeordnete poröse Matrix (40), in der eine ionische Flüssigkeit (50), insbesondere als Elektrolyt, aufnehmbar oder aufgenommen ist, wobei zumindest die Messelektrode (20) in Kontakt mit einem Messgas (60) ist oder bringbar ist, und wobei die Messelektrode (20) und die Referenzelektrode (30) dazu eingerichtet sind, dass bei Kontaktierung der Messelektrode (20) mit dem Messgas (60) eine elektrische Spannung zwischen der Messelektrode (20) und der Referenzelektrode (30) anliegt, die von der Konzentration des Messgases (60) abhängt, so dass die Konzentration des Messgases (60) mittels der elektrischen Spannung bestimmbar ist. Die Erfindung betrifft weiterhin ein Verfahren zur Konzentrationsbestimmung eines Messgases (60) mittels des potentiometrischen Gassensors (10).