Sensor With Long-Term Stability

Abstract

Various embodiments of the teachings herein include a sensor for estimating an oxygen concentration. An example includes: a reference terminal; a pump and sense terminal; a first sensor disk; a boundary member including a second sensor disk; one or more spacers; a heater; a pair of electric terminals galvanically connected to the heater; a temperature sensing element and a plurality of electric terminals connected to the temperature sensing element; an electric supply connected to the heater via the pair of electric terminals; and an electric circuit connected to the temperature sensing element via the plurality of electric terminals. The boundary member, the one or more spacers, and the reference terminal enclose a sealed chamber. The boundary member is interposed between the heater and the sealed chamber. The electric circuit is galvanically isolated from the electric supply.

Dependencies are inferred from the claim text.