Liquid sensor for a diaper and method of manufacturing the same

A method of manufacturing a liquid sensor, the method comprising:

• providing a plurality of electrochemical cells, each of the plurality of electrochemical cells comprising:
• an anode;
• a cathode;
• and
• a liquid-porous layer comprising an electrolyte solution, the liquid-porous layer electrically connecting the anode and the cathode such that each cell has a respective predetermined potential difference across the cell;
• and
• connecting the plurality of electrochemical cells in series connection;
• wherein:
• two or more of the plurality of electrochemical cells are electrically connectable by a liquid to form a single electrochemical cell having a potential difference lower than the sum of the predetermined potential differences of the two or more electrochemical cells;
• and,
• providing the plurality of electrochemical cells comprises:
• providing the anode of each cell, the anode having a first end and a second end opposite the first end;
• enclosing the first end of said cell with the liquid-porous layer;
• and
• at least partially surrounding the liquid-porous layer with the cathode of said cell, the cathode comprising a hollow cylinder having a plurality of holes formed thereon.

A liquid sensor for a diaper, the liquid sensor comprising:

• a plurality of electrochemical cells in series connection, each of the plurality of electrochemical cells comprising:
• an anode;
• a cathode;
• and
• a liquid-porous layer comprising an electrolyte solution, the liquid-porous layer electrically connecting the anode to the cathode such that each cell has a respective predetermined potential difference across the cell;
• wherein two or more of the plurality of electrochemical cells are operable to be electrically connected by a liquid to form a single electrochemical cell having a potential difference lower than the sum of the predetermined potential differences of the two or more electrochemical cells;
• and
• wherein the plurality of electrochemical cells are arranged laterally adjacent to each other to form a film, and wherein the film is disposed on an insulated substrate.

A method of manufacturing a liquid sensor, the method comprising:

• providing a plurality of electrochemical cells, each of the plurality of electrochemical cells comprising:
• an anode;
• a cathode;
• and
• a liquid-porous layer comprising an electrolyte solution, the liquid-porous layer electrically connecting the anode and the cathode such that each cell has a respective predetermined potential difference across the cell;
• and
• connecting the plurality of electrochemical cells in series connection;
• wherein two or more of the plurality of electrochemical cells are electrically connectable by a liquid to form a single electrochemical cell having a potential difference lower than the sum of the predetermined potential differences of the two or more electrochemical cells;
• and
• wherein providing the plurality of electrochemical cells comprises:
• providing an insulated substrate;
• and
• disposing the plurality of electrochemical cells on the insulated substrate such that the plurality of electrochemical cells are arranged laterally adjacent to each other to form a film.