| abstract |
A carbon dioxide sensor ( 1 ) has a substrate ( 10 ) containing a solid electrolyte. A detecting electrode ( 20 ) and a reference electrode ( 30 ) are provided on a principal surface ( 12 ) of the substrate ( 10 ). A glass layer ( 40 ) is provided on at least part of the surface of the substrate ( 10 ). The glass layer ( 40 ) contains boron, phosphorus, zinc, or titanium. |