Japan Storage Battery Co., Ltd.

W. L. Gore & Associates, Inc.

Hisashi Kudo

Yuko Fujita

Shuji Hitomi

Haruo Nomi

Yoshihiko Shibata

Yoshiharu Iwanami

Ryozo Ueno

Ikuo Tanigawa

A galvanic cell type gas sensor which utilizes the respective merits of galvanic cell type and polaro type gas sensors so that a plurality of gasses can be detected by one sensor. One working electrode is utilized in conjunction with two or more counter electrodes which are different in kind from each other. Each of the electrodes are individually selected corresponding to a type of gas to be detected. Also, drift in the measurement of one of the detected gasses can be corrected based upon the measurement of another of the detected gasses.

Galvanic cell type gas concentration sensor system capable of detecting

Sensor for measuring solute concentration in an aqueous solution

In the invention, an electrochemical cell including an oxygen reducing cathode, an oxygen generating anode and an electrolyte, and having both a deoxygenating function and an oxygen generating function is coupled to a chamber in such a manner that, when the oxygen concentration in the chamber is much higher than a predetermined value, the deoxygenating function is utilized to decrease the oxygen concentration and when the oxygen concentration in the chamber is much lower than the predetermined value, the oxygen generating function is utilized to increase the oxygen concentration so that the oxygen concentration in the chamber is maintained at the predetermined value.

Oxygen concentration controlling method and system

A galvanic cell type oxygen sensor comprising a galvanic cell comprised of a cathode made up of metal effective for the electrolytic reduction of oxygen, an anode made up of lead material and an electrolyte made up of an aqueous mixed solution of organic acid and organic acid salt, which has a long life and a high output voltage, is not at all affected by carbon dioxide and which can prevent the generation of hydrogen from the cathode, is disclosed.

Galvanic cell type oxygen sensor

A method of storing foodstuffs and an apparatus for practicing the same, in which an electrolytic cell includes a gas diffusion cathode capable of reducing oxygen electrolytically and an oxygen liberating anode, and a DC voltage is applied to the electrolytic cell while the gas in a food storage chamber is brought into contact with the cathode to remove oxygen from the storage chamber, whereby the oxygen concentration in the storage chamber is controlled to a desired value.

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Kyoto, Japan

Hisashi Kudo