| 摘要 |
PURPOSE:To increase the sensitivity for a detected gas of a planar-type electrochemical gas sensor element of which a working electrode, a counter electrode and a reference electrode are formed on an insulating substrate. CONSTITUTION:In an electrochemical gas sensor element of which a plurality of electrodes including a working electrode 2 are provided on an insulating substrate 1 while a solid electrolyte film 5 convering this working electrode 2 is formed on the aforesaid insulating substrate 1, the insulating substrate 1 has properties of making a detected gas permeate therethrough toward the surface on the working electrode 2 side, and by making electroconductive particulates 6 stick on the surface of the working electrode 2, the electrode area of the working electrode 2 is increased. |
