METHOD TO MEASURE OXYGEN IN GAS MEDIA Russian patent published in 2014 - IPC G01N27/41 

FIELD: measurement equipment.

SUBSTANCE: use: to measure concentration of oxygen in gas mixtures of different composition. The substance of the invention consists in the fact that a cell is used with a cavity formed by an oxygen-conducting solid electrolyte, on the opposite surfaces of electrolyte there are electrodes, including a measuring and a reference one, by means of the electrodes they measure the difference of oxygen potentials between reference and the analysed gas, and by the value of the produced EMF they calculate the quantity of oxygen in the analysed gas. The reference gas is pure oxygen, for this purpose they use a cell with a gas-tight cavity, formed by a solid electrolyte, on the opposite surfaces of which there are two pairs of electrodes, one of which performs the function of an oxygen pump, and the other comprises measuring and reference electrodes, besides, the reference electrode is located inside the cell cavity. The cell is placed into a flow of the analysed gas, pure oxygen is pumped into the cell cavity from analysed gas by sending DC voltage to a pair of electrodes, and by means of measuring and reference electrodes they measure the difference of oxygen potentials between pure oxygen that washes the reference electrode and the analysed gas that washes the measuring electrode, and by the value of this EMF they calculate the quantity of oxygen in the analysed gas.

EFFECT: provision of the possibility to create a more accurate and quick-acting method of oxygen measurement in gas media that is simple in operation.

7 cl, 1 dwg