(JP11219717-A)   NOVELTY - Carbon monoxide in a fuel cell reformate feed stream is monitored using a mini fuel cell probe located in the stream which is discharged at intervals to measure the carbon monoxide concentration and purged at intervals to remove carbon monoxide from the probe anode catalyst.    USE - In monitoring and controlling CO concentration at locations in a PEM fuel cell stack used for e.g. electric vehicles.    ADVANTAGE - The method allows real time monitoring of CO concentration in the reformate feed stream with repeated refreshment of the probe anode. The method is useful during startup to determine whether the CO level in the effluent from the preferential oxidation (PROX) reaction is sufficiently low for direct use in the fuel cell; and is also useful for real time control of the oxygen supply to the PROX reaction.    (US6063516-A)   NOVELTY - Carbon monoxide in a fuel cell reformate feed stream is monitored using a mini fuel cell probe located in the stream which is discharged at intervals to measure the carbon monoxide concentration and purged at intervals to remove carbon monoxide from the probe anode catalyst.    USE - In monitoring and controlling CO concentration at locations in a PEM fuel cell stack used for e.g. electric vehicles.    ADVANTAGE - The method allows real time monitoring of CO concentration in the reformate feed stream with repeated refreshment of the probe anode. The method is useful during startup to determine whether the CO level in the effluent from the preferential oxidation (PROX) reaction is sufficiently low for direct use in the fuel cell; and is also useful for real time control of the oxygen supply to the PROX reaction.    (US6265092-B1)   NOVELTY - Carbon monoxide in a fuel cell reformate feed stream is monitored using a mini fuel cell probe located in the stream which is discharged at intervals to measure the carbon monoxide concentration and purged at intervals to remove carbon monoxide from the probe anode catalyst.    USE - In monitoring and controlling CO concentration at locations in a PEM fuel cell stack used for e.g. electric vehicles.    ADVANTAGE - The method allows real time monitoring of CO concentration in the reformate feed stream with repeated refreshment of the probe anode. The method is useful during startup to determine whether the CO level in the effluent from the preferential oxidation (PROX) reaction is sufficiently low for direct use in the fuel cell; and is also useful for real time control of the oxygen supply to the PROX reaction.