Patent ID: 11733225

Abstract:
An oxygen sensor for a gas, coal, oil or wood fired kiln that is orders of magnitude cheaper than the current state of the art oxygen sensors. It uses a TiO2 tip sintered between and bridging a 1 mm spacing between a pair of 22 gauge Nichrome® series 90 round annealed resistance wires (0.64 mm diameter and having 0.648 Ohms/ft resistance). The Nichrome® 90 wires do not contact each other. One of the wires is a signal wire that resides down the center of an insulating sheath and the other wire is a ground wire that is wound around the outside of a high temperature ceramic insulating sleeve. The sensor needs no temperature compensation and exhibits an approximate 50,000 ohms of resistance change from a neutral (ambient) atmosphere and a fully reduced atmosphere.