Electrochemical apparatus and method of manufacturing the same
First Claim
1. An electrochemical apparatus utilizing an electrochemical cell having a solid-electrolyte and at least one pair of porous electrodes arranged in contact with said solid-electrolyte, wherein one of said pair of electrodes is exposed through a diffusion means having a diffusion resistance to a gas to be measured to a space in which the gas to be measured is present, and an atmosphere near said one of the electrode is controlled by an electrode reaction due to a current flowing through said one pair of electrodes, comprising:
- a first branch conductor and a second branch conductor formed by dividing one of conductors respectively connected to said electrodes and arranged connectably to an external power source;
at least one first resistive means formed in said first branch conductor, a resistive value of which can be arbitrarily adjusted; and
at least one second resistive means formed in said second branch conductor;
whereby a predetermined current corresponding to a predetermined concentration of the gas to be measured flows through one of said first or second resistive means.
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Accused Products
Abstract
In an electrochemical apparatus utilizing an electrochemical cell having a solid-electrolyte and at least one pair of porous electrodes arranged in contact with the solid-electrolyte, wherein one electrode of the pair of electrodes is exposed through a diffusion means having a diffusion resistance with respect to a gas to be measured in a space in which the gas to be measured is present, and an atmosphere near one of the electrodes is controlled by an electrode reaction due to a current flowing through the pair of electrodes, a first branch conductor and a second branch conductor are formed by dividing one of conductors respectively connected to the electrodes, and at least one adjustable first resistive means and at least one second resistive means are respectively formed in the first branch conductor and the second branch conductor. Therefore, a predetermined current flows through either the first or second resistive means, and thus it is possible to obtain the electrochemical apparatus which maintains a constant quality in large scale manufacturing.
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Citations
14 Claims
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1. An electrochemical apparatus utilizing an electrochemical cell having a solid-electrolyte and at least one pair of porous electrodes arranged in contact with said solid-electrolyte, wherein one of said pair of electrodes is exposed through a diffusion means having a diffusion resistance to a gas to be measured to a space in which the gas to be measured is present, and an atmosphere near said one of the electrode is controlled by an electrode reaction due to a current flowing through said one pair of electrodes, comprising:
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a first branch conductor and a second branch conductor formed by dividing one of conductors respectively connected to said electrodes and arranged connectably to an external power source; at least one first resistive means formed in said first branch conductor, a resistive value of which can be arbitrarily adjusted; and at least one second resistive means formed in said second branch conductor;
whereby a predetermined current corresponding to a predetermined concentration of the gas to be measured flows through one of said first or second resistive means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of manufacturing an electrochemical apparatus utilizing an electrochemical cell having a solid-electrolyte and at least one pair of porous electrodes arranged in contact with said solid-electrolyte, wherein one of said pair of electrodes is exposed through a diffusion means having a diffusion resistance to a gas to be measured in a space in which the gas to be measured is existent, and an atmosphere near said one of the electrodes is controlled by an electrode reaction due to a current flowing through said one pair of electrodes, comprising the steps of:
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forming a first branch conductor and a second branch conductor by dividing one of conductors respectively connected to said electrodes; forming at least one first resistive means in said first branch conductor, a resistive value of which can be arbitrarily adjusted; forming at least one second resistive means in said second branch conductor; and adjusting the resistive value of said first resistive means to a predetermined value so as to obtain a predetermined output in response to a component concentration of the gas to be measured from a current through one of said first branch conductor and second branch conductor. - View Dependent Claims (8, 9)
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10. An electrochemical apparatus including a connector portion for use in connection with an external power source and an electrochemical cell having a solid-electrolyte arranged in contact with said solid-electrolyte, wherein one of said pair of electrodes is exposed through a diffusion means having a diffusion resistnce with respect to a gas to be measured to a space in which the gas to be measured is existent, and an atmosphere near said one of the electrodes is controlled by an electrode reaction due to a current flowing through said one pair of electrodes, comprising:
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a first branch conductor and a second branch conductor formed by dividing one of conductors respectively connected to said electrodes and arranged connectably to the external power source through said connector portion; at least one first resistive means arranged between said electrochemical cell and said connector portion, a resistive value of which can be arbitrarily adjusted; and at least one second resistive means formed in said second branch conductor, whereby a predetermined current corresponding to a predetermined concentration of the gas to be measured flows through one of said first or second resistive means. - View Dependent Claims (11, 12, 13, 14)
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Specification