Patent ID: 6945091
Filing Date: 2005-09-20
Classification: G01N

Abstract:
1. A gas sensor comprising: a hollow cylindrical housing having a length with a first end and a second end opposed to the first end; a measurement gas side insulation porcelain disposed within said housing; a sensor element disposed within said measurement gas side insulation porcelain, said sensor element having a base portion projecting from the first end of said housing and a sensing portion projecting from the second end of said housing; an atmosphere side cover installed on the first end of said housing; an atmosphere side insulation porcelain disposed on said measurement gas side insulation porcelain within said atmosphere side cover to cover the base portion of said sensor element; a thread formed on a portion of a side wall of said housing on a side of said second end for joint of said gas sensor to a given member to expose the sensing portion of said sensor element to a measurement gas, said thread having a top end closer to said second end of said housing than to the first end; and a measurement side cover welded to the second end of said housing to cover the sensing portion of said sensor element, weld of said measurement side cover to said second end of said housing being located closer to the first end of said housing than the top end of said thread.