| 摘要 |
PURPOSE:To simplify assembling, by constituting the title detector by winding an insulating sheet member having an opening, heater wiring and an electrode lead wire corresponding to an oxygen concn. detection element around the outer periphery of a middle shaft having the oxygen concn. detection element engaged therewith. CONSTITUTION:A hollow part 12 is formed to the middle shaft 11 of a cylindrical insulating body and the atmosphere is introduced into the hollow part 12 from the base end part of said shaft. Further, the leading end part of the middle shaft 11 is closed and an opening 14 is formed to the shaft 11 to engage an oxygen concn. detection element 15. A piercing hole is formed to a sheet member 16 corresponding to the opening 14 of the oxygen concn. detection element 15 and, further, heater wiring and an electrode lead wire are arranged to the sheet member 16 while said sheet member 16 is wound around the outer periphery of the middle shaft 11 and integrally baked to fix the oxygen concn. detection element 15. A porous protective layer 17 is further provided the sheet member 16 to constitute an oxygen concn. detector. Since the sheet member is wound around the middle shaft to constitute the detector, assembling is made easy and mechanical strength can be made high. |
