Patent ID: 9417200
Filing Date: 2016-08-16
CPC Classification: G01N

Claim Text:
1. A moisture concentration detecting device that detects a moisture concentration in an insulating gas with which a gas insulating device is filled, the device comprising: a gas chamber into which the insulating gas is introduced from an inside of the gas insulating device; a pair of porous electrodes that are arranged to face each other in the gas chamber; a solid electrolyte membrane fixed such that the solid electrolyte membrane is sandwiched between the electrodes; a case which covers the pair of electrodes and the solid electrolyte membrane and on a surface of which a pleated portion is provided; an impedance measuring unit that measures an AC impedance between the electrodes by applying an AC voltage to the pair of electrodes; a storage device that stores therein conversion information for converting an AC impedance between the electrodes into a moisture concentration in the insulating gas; and a moisture concentration detecting unit that obtains a moisture concentration in the insulating gas from a measured value of the AC impedance by referring to the conversion information stored in the storage device with respect to the measured value of the AC impedance input from the impedance measuring unit.