DEVICE FOR MEASURING VOLUME FRACTION AND PARTIAL PRESSURE OF OXYGEN IN GASES Russian patent published in 2017 - IPC G01N27/409 

FIELD: measuring equipment.

SUBSTANCE: device for measuring volume fraction and partial pressure of oxygen in gases contains a potentiometric solid electrolyte cell, a gas path, a heater, a thermocouple and a temperature controller, in this case, in order to improve the accuracy under changing conditions of oxygen partial pressure in the environment, the potentiometric solid electrolyte cell has a working measuring electrode made of a gas-permeable porous platinum, in contact with analysed gas, a sealed reference chamber with a reference electrode made of gas-permeable porous platinum applied on opposite side of the solid electrolyte of working measuring electrode in the reference chamber for creating support medium with known partial pressure of oxygen. Analytical calibration characteristic which connects volume fractions of oxygen in reference and analysed chambers is used to determine volume fraction of oxygen, and analytical calibration curve which connects total pressure in reference and analysed media is used for determination of partial pressure of oxygen.

EFFECT: increased measurement accuracy of volume fraction and partial pressure of oxygen in analysed gas.

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