Method of making solid electrolyte oxygen sensor with integral heater

摘要

Solid electrolyte oxygen sensor incorporates a sealed integral heater which is positioned internally of the tubular wall of the ceramic sensor body in the region radially adjacent the disc shaped solid electrolyte which is mounted transverse to the axis of the body. A plurality of small longitudinal apertures are formed in the body wall by extrusion. A groove formed in the external side wall of the body provides access so that a resistance heating wire can be threaded alternately in opposite directions through the small apertures. The wire bends are accommodated by the side wall groove and an end wall groove, each of which can be sealed with a castable ceramic after the wire is installed.