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A sensor is constituted by joining a pair of electrodes to a sensor body formed by binding hydrogen occluding metal with binders. Change in the electric resistance between the electrodes and the quantity of hydrogen occluded by the hydrogen occluding metal in the sensor body has a one to one relatio

A sensor is constituted by joining a pair of electrodes to a sensor body formed by binding hydrogen occluding metal with binders. Change in the electric resistance between the electrodes and the quantity of hydrogen occluded by the hydrogen occluding metal in the sensor body has a one to one relationship. Therefore, the quantity of hydrogen occluded by the hydrogen occluding metal can be estimated from the resistance value obtained by the sensor.

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[ We claim:] [23.] An apparatus for measuring a quantity of hydrogen, comprising:a first measuring unit including a first unitary sensor body of particles of a hydrogen occluding metal dispersed within binder and which has an electrical resistance which varies in accordance with a first relationship

[ We claim:] [23.] An apparatus for measuring a quantity of hydrogen, comprising:a first measuring unit including a first unitary sensor body of particles of a hydrogen occluding metal dispersed within binder and which has an electrical resistance which varies in accordance with a first relationship with the quantity of hydrogen in said hydrogen occluding metal, and first calculating means for, with reference to the first relationship and in accordance with the electric resistance, calculating the quantity of hydrogen in said hydrogen occluding metal;a second measuring unit including a second unitary sensor body of particles of a hydrogen occluding metal dispersed within binders and which has an electrical resistance which varies in accordance with a second relationship with the quantity of hydrogen in said hydrogen occluding metal, and second calculating means for, with reference to the second relationship and in accordance with the electric resistance of said second sensor body, calculating the quantity of hydrogen in said hydrogen occluding metal; andan output unit for processing results of calculations performed by said first and second measuring units in accordance with a predetermined third relationship between electrical resistance and the quantity of hydrogen in said hydrogen occluding metal and outputting the result of the processing.