Patent ID: 7191505
Filing Date: 2007-03-20
Classification: G01N,Y10T

Abstract:
1. A sealed sensor housing for use in detecting a concentration of an impurity or additive in a fluid, the housing comprising: a housing body of a metal formed by a deformation process with substantially no machining, the housing body being joined to an inlet tube, an outlet tube, and an electrode, and wherein the housing body comprises: a flat plate, the flat plate having a top surface, a bottom surface opposite of the top surface and a hole, the distance between the top surface and the bottom surface defining a thickness of the flat plate, the hole extending through the thickness of the flat plate; a top plate having a top surface, a bottom surface opposite of the top surface of the top plate, an inlet hole and an outlet hole, the distance between the top surface and the bottom surface of the top plate defining a thickness of the top plate, the inlet hole and the outlet hole extending through the thickness of the top plate and being laterally displaced one from the other; the top plate being coupled to the flat plate, hermetically, such that a channel is defined between the top plate and the flat plate for channeling the fluid from the inlet hole to the outlet hole; the electrode being sealed hermetically and insulatively by a hermetic sealant in the hole of the flat plate; and an electrode housing joined hermetically in one of the inlet hole or the outlet hole, the electrode housing aligning over the hole in the flat plate such that the electrode extends through the hole in the flat plate and into the electrode housing without contacting the electrode housing.