Method of fabricating an electrolytic cell gas sensor

Details Method of fabricating an electrolytic cell gas sensor Method of fabricating an electrolytic cell gas sensor

1974-09-13

1976-05-11

Hall, Carl E.

Metal working

Method of mechanical manufacture

Assembling or joining

23232E, 23255E, 73 23, 338 34, 340237R, 427 80, H01G 924

Patent

active

039552683

ABSTRACT:
A Solid State Electrolytic Cell Gas Sensor is presented which is capable of measuring various toxic or combustible gases in low concentrations (0-5 PPM) up to and including high concentrations such as 0-20 percent by volume. The sensor exhibits excellent specificity to the gas designated to be detected. The sensor causes the dissociation of the gases into charged species such as ions and complex ions and does not operate by changing its electro-conductivity in response to the adsorption of the gas. The sensor has an electrical signal which is a function of the type and concentration of gas and which is also a function of the collection of ions by transport process. The solid state material from which the sensor is fabricated is produced by the method of addition of one or more metal oxides to a non-metal oxide with a general formula of MxOy - NpOq. M can be a metal from the transition elements and N can be a non-metal of group III and IV from the periodic table. The sensor comprises a collector and a heater element made from a stable metal such as platinum. A material such as stannic oxide may be mixed with a material such as silica gel. The combination may be heated and dried and dissolved in an alcohol and water solution. The resulting combination is then coupled to the heater wire and to the collector wire and heated to form the finished sensor.

REFERENCES:
patent: 3200011 (1965-08-01), Baker
patent: 3564474 (1971-02-01), Firth
patent: 3625756 (1971-12-01), Taguchi
patent: 3644795 (1972-02-01), Taguchi
patent: 3732519 (1973-05-01), Taguchi
patent: 3751968 (1973-08-01), Loh et al.
patent: 3865550 (1975-02-01), Bott et al.

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