Ngk Spark Plug Company, Limited

Norobu Ishida

Takafumi Oshima

Ryuji Inoue

Norihiko Nadanami

Tomonori Kondo

A hydrogen gas sensor capable of accurately measuring hydrogen concentration of a measurement gas atmosphere in the presence of a variety of interfering gasses such as HO and CO. In the hydrogen gas sensor, the flow sectional area of a diffusion-rate limiting portionis rendered small; the electrode surfaces of first and second electrodesandare rendered large; and/or a solution containing a polymer electrolyte which may be identical to that of a proton-conductive layeris applied onto the surfaces of the first and second electrodesandto thereby form a layer containing the polymer electrolyte. Thus, the rate of conduction of protons from the first electrodeto the second electrodebecomes greater than the rate at which protons are derived from hydrogen which is introduced onto the first electrodevia the diffusion-rate limiting portion

Hydrogen gas sensor

A hydrogen gas sensor capable of accurately measuring hydrogen concentration of a measurement gas atmosphere in the presence of a variety of interfering gasses such as H O and CO. In the hydrogen gas sensor, the flow sectional area of a diffusion-rate limiting portion is rendered small; the electrode surfaces of first and second electrodes and are rendered large; and/or a solution containing a polymer electrolyte which may be identical to that of a proton-conductive layer is applied onto the surfaces of the first and second electrodes and to thereby form a layer containing the polymer electrolyte. Thus, the rate of conduction of protons from the first electrode to the second electrode becomes greater than the rate at which protons are derived from hydrogen which is introduced onto the first electrode via the diffusion-rate limiting portion

Growing community of inventors

Gifu, Japan

Norobu Ishida