Abstract

Solid state electrochemical gas sensors allow the measurement of partial gas pressures with high accuracy. However, there are problems related to the response time, drift and cross sensitivity which should be solved to improve the performance of these sensors. An intelligent sensor system is presented which improves the sensor response time, compensates the drift and allows to calculate functional relationships between the electrical and the chemical energy of galvanic cell reactions. An electronic circuit for evaluating the measured cell voltage of a type III potentiometric CO2 sensor is also presented.

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