Patent ID: 6110348
Filing Date: 2000-08-29
Classification: G01N

Abstract:
A sensor for detecting a concentration of NOx in a sample gas, comprising:a main body having a sensor cell and defining a reference gas chamber and a sample gas chamber therein, said sample gas chamber having a wall formed by a solid electrolytic substrate having an oxygen ion conductivity, and said sensor cell being disposed between said reference gas chamber and said sample gas chamber for detecting a concentration of a NOx gas, anda pump cell body having a surface facing to said sample gas chamber and having a pump cell for introducing and exhausting an oxygen gas to and from said sample gas chamber,wherein no electrode of said sensor cell is contaminated by a substance evaporating from said pump cell during a sintering operation by independently sintering said main body and said pump cell body,wherein said main body has a coupling groove with which said pump cell body is coupled, and said pump cell body is bonded with said main body by an adhesive.