Patent ID: 7664607
Filing Date: 2010-02-16
Classification: G01N

Abstract:
1. A pre-calibrated gas sensor, comprising: a cathode and an anode for outputting a current signal responsive to a sensed oxygen concentration, wherein the cathode and the anode are in communication with a liquid electrolyte solution; and a signal processing module in communication with the cathode and the anode and having a pre-calibration transfer function stored therein, wherein the signal processing module comprises a microcontroller and is configured to receive the current signal and to output a pre-calibrated signal representative of the sensed oxygen concentration based on the pre-calibration transfer function and a value of the received current signal, and wherein the pre-calibration transfer function comprises a gain function for compensating a time-dependent drift of the gas sensor caused by at least one of a reduction in ion concentration of the electrolyte solution and formation of precipitates on the anode.