Hydrogen sensor element for measuring concentration of hydrogen gas dissolved in liquid and method for measuring concentration of hydrogen gas using same

A dissolved hydrogen measuring device for measuring a concentration of dissolved hydrogen gas in liquid contained in a container, the dissolved hydrogen measuring device comprising:

• a hydrogen sensor device coupled to an opening portion provided at one side of the container,
• wherein the hydrogen sensor device includes a sensor unit measuring a concentration of hydrogen gas;
• and a housing coupled to the sensor unit, the housing including a housing body having an opening portion formed in at least a part thereof and a gas separation film coupled to the opening portion to be gaseously and liquidly sealed and having a sealing space isolated from the liquid and external air therein, and
• the gas separation film is in communication with the inside of the container through the opening portion to penetrate the dissolved hydrogen gas in the liquid into the sealing space.

A hydrogen sensor device for measuring a concentration of dissolved hydrogen gas in liquid, the hydrogen sensor device comprising:

• a housing having a cylindrical shape in which at least a partial area is opened and in which a gas separation film is coupled to the opened partial area, the gas separation film being not capable of penetrating the liquid but capable of penetrating hydrogen gas;
• and
• a sensor unit including at least a first electrode and a second electrode,
• wherein the sensor unit is coupled to the housing so that the first electrode is inserted into the housing to measure a concentration of hydrogen gas that enters the housing through the gas separation film to contact the first electrode.

A hydrogen sensor device at least partially inserted into liquid to measure a concentration of dissolved hydrogen gas in the liquid, the hydrogen sensor device comprising:

• a sensing unit including a reference electrode and a sensing electrode at both sides of a solid electrolyte;
• a reference gas passage for supplying reference gas to the reference electrode while being isolated from the liquid;
• a heater unit for heating the sensor unit up to a sensing temperature;
• and
• an electromotive force measuring unit measuring electromotive force between the reference electrode and the sensing electrode,
• wherein the sensing electrode is exposed to the dissolved hydrogen gas in the liquid and as the concentration of the dissolved hydrogen gas is changed, the electromotive force is changed.

A hydrogen sensor device at least partially inserted into liquid to measure a concentration of dissolved hydrogen gas in the liquid, the hydrogen sensor device comprising:

• a sensing unit including a reference electrode and a sensing electrode at both sides of a solid electrolyte;
• a reference gas partial pressure fixing reference substance covering the reference electrode to fix reference gas partial pressure at the reference electrode side;
• a heater unit for heating the sensor unit up to a sensing temperature;
• and
• an electromotive force measuring unit measuring electromotive force between the reference electrode and the sensing electrode,
• wherein the sensing electrode is exposed to the dissolved hydrogen gas in the liquid and as the concentration of the dissolved hydrogen gas is changed, the electromotive force is changed.