Amperometric gas sensor to selectively determine the partial pre

Details Amperometric gas sensor to selectively determine the partial pre Amperometric gas sensor to selectively determine the partial pre

1992-04-14

1994-06-21

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415315, G01N 2726

Patent

active

053226011

ABSTRACT:
The invention concerns as amperometric gas sensor for the selective deteration with high accuracy of a gas partial pressures. Such a gas sensor includes a solid electrolyte and inert electrodes. The solid electrolyte, contained in the sensor, is selected in such a way that when an electrical current or voltage is applied, ions contained in the electrolyte form a reaction product with the gas to be determined in a secondary equilibrium reaction and with generation of an electrically measurable signal. Preferred solid electrolytes are Na.sup.+ -.beta." aluminum oxide, NASICON, cubic stabilized zirconium oxide and polycrystals of tetragonal zirconium oxide. A method for the selective determination of gases using such electrodes also is described. Preferably an electrical current or voltage source shall be used which feeds a periodic, especially a sawtooth or sinusoidal signal, to the solid electrolyte, as a result of which the formed reaction product is decomposed to the same extent it was previously built up.

REFERENCES:
patent: 4855034 (1989-08-01), Sugimoto et al.
patent: 4875981 (1989-10-01), Usami et al.

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