Abstract
Zirconia-based electrochemical sensors are useful tools for the measurement of rapidly fluctuating oxygen levels in fluidized-bed combustors. A drawback of these sensors is the cumbersome associated equipment needed to provide a reference air supply. The use of a sealed metal/metal oxide-referenced probe offers the prospect of miniaturization of the technology and the potential for wider application. A robust sensor has been developed, which has a viable operating life for use as a diagnostic tool in the mapping of oxygen and fuel distributions in a fluidized-bed combustor. This paper presents an outline of the development programme, describes the sensor design and characteristics of the output signal.
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