Abstract: A hydrogen quantity sensor can directly measure hydrogen contained in a hydrogen storage device with simple and easy means. The hydrogen quantity sensor comprises a detecting electrode comprised of a hydrogen storage alloy disposed inside a hydrogen storage vessel, a standard electrode disposed to confront the detecting electrode; and an electrolyte member disposed between the detecting electrode and the standard electrode. The detecting electrode, the standard electrode and the electrolyte member constitute a sensor portion to measure hydrogen concentration within the hydrogen storage alloy as an electromotive force value.

Abstract: A first electrode and a second electrode are provided, and an electrolyte is disposed between the first electrode and the second electrode. The first electrode and the second electrode are made of corresponding different materials in chemical potential for hydrogen gas. The first electrode includes higher chemical potential material and the second electrode includes lower chemical potential material. The first electrode functions as a detecting electrode for hydrogen gas, and the second electrode functions as a standard electrode for the hydrogen gas. The hydrogen gas is detected on an electromotive force generated between the first electrode and the second electrode.

Abstract: It is an object of the present invention to provide a hydrogen quantity sensor that can directly measure hydrogen contained in a hydrogen storage device with simple and easy means. The hydrogen quantity sensor comprises a detecting electrode 30 comprised of a hydrogen storage alloy 18 disposed inside a hydrogen storage vessel 10, a standard electrode 28 disposed to confront the detecting electrode 30; and an electrolyte member 26 disposed between the detecting electrode 30 and the standard electrode 28. The detecting electrode 30, the standard electrode 28 and the electrolyte member 26 constitute a sensor portion 32 to measure hydrogen concentration within the hydrogen storage alloy 18 as an electromotive force value.

Abstract: A first electrode and a second electrode are provided, and an electrolyte is disposed between the first electrode and the second electrode. The first electrode and the second electrode are made of corresponding different materials in chemical potential for hydrogen gas. The first electrode includes higher chemical potential material and the second electrode includes lower chemical potential material. The first electrode functions as a detecting electrode for hydrogen gas, and the second electrode functions as a standard electrode for the hydrogen gas. The hydrogen gas is detected on an electromotive force generated between the first electrode and the second electrode.

Abstract: Inside a furnace body a number of material-stay spaces are set along a predetermined circular locus of travel of materials to be treated. The furnace body is divided into a heating chamber and a cooling chamber, and some of the stay spaces are located in the former chamber while the others are in the latter. A material is placed into one of the stay spaces located in the heating chamber, and heated therein. Then the material is moved into and stopped at one of the stay spaces located in the cooling chamber, and cooled therein. This process of heating and cooling the material is repeated a predetermined number of times so as to treat the material as desired.