Solid state electrolytic cell gas sensor head

Details Solid state electrolytic cell gas sensor head Solid state electrolytic cell gas sensor head

1976-06-10

1977-03-22

Rolinec, Rudolph V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 71SN, 338 34, 73 27R, 340237R, 23232E, 23254F, G01N 2700, H01L 700, G01N 2762

Patent

active

040139433

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: 3865550 (1975-02-01), Bott et al.
patent: 3911386 (1975-10-01), Beaudoin et al.

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