Method for sensing nitrous oxide

Details Method for sensing nitrous oxide Method for sensing nitrous oxide

1989-12-12

1991-07-23

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

204425, 204426, G01N 27417

Patent

active

050341073

ABSTRACT:
A method for identifying and determining the concentration of nitrous oxide in a gas containing nitrous oxide, oxygen and nitrogen is disclosed. A negative voltage is applied across a set of electrodes separated by an electrolyte wall. The voltage is of such a magnitude to produce an electric current which is on a plateau. The current is measured initially using air or oxygen as a test gas. After this reading is taken the gas containing nitrous oxide in oxygen and air is measured for its current and the concentration of nitrous oxide is determined using the two measured currents. The negative voltage can be applied at two different magnitudes to have two currents measured. Nitrous oxide containing mixtures would yield equivalent current readings.

REFERENCES:
patent: 2773237 (1956-12-01), Offutt et al.
patent: 4450065 (1984-05-01), Yamada et al.
patent: 4769124 (1988-09-01), Okada et al.
patent: 4770760 (1988-09-01), Noda et al.
patent: 4909072 (1990-03-01), Logothetis et al.

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