SENSITIVE ELEMENT OF ELECTROCHEMICAL SENSOR FOR CARBON MONOXIDE IN GAS MIXTURES Russian patent published in 2008 - IPC G01N27/406 

FIELD: measuring devices.

SUBSTANCE: sensitive element of the electrochemical sensor for carbon monoxide in gas mixtures is made from a solid oxide electrolyte with polarised and non-polarised electrodes on its surface. The electrolyte is in the form of plates. The comparison non-polarised electrode is put on the surface of the electrolyte in form of a paste of silver oxide, while the operating polarised electrode is put on the surface of the electrolyte in form of a fine-dispersed platinum powder or palladium with a dope of up to 10% of the electrolyte powder. Both electrodes are baked, and the operating electrode is activated.

EFFECT: lowering of operating temperature of the sensor down to possibility of measuring non-equilibrium values of carbon monoxide in the presence of free oxygen, exclusion of division of the gas space of the electrochemical cell, which greatly simplifies the structure of the measuring cell and improves its operational characteristics.

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