| 摘要 |
PURPOSE:To obtain a small-sized and lightweight nitrogen oxide sensor by coating a metal nitrate film on the detecting electrode side of a solid electrolyte piece made to a metal ion conductor, and measuring the potential difference between current collectors. CONSTITUTION:A solid electrolyte piece 12 is inserted at one end of a glass tube 10, and it is airtightly sealed with an inorganic adhesive 14. One end of a platinum wire 24 is connected as a lead wire to a platinum mesh 22 on the face of the electrolyte piece 12 faced to the outside of the glass tube 10. A metal nitrate film 26 is coated to cover the platinum mesh 22. A metal nitrate film 36 is coated on the face of the solid electrolyte piece 12 faced to the inside of the glass tube 10 to cover the platinum mesh 32. To operate this nitrate oxide sensor with voltage, platinum wires 24, 34 are connected to an electro-meter, and the potential difference between both current collectors is measured while the NO2 gas with excessive oxygen is fed to only the outside of the glass tube 10. |
