Fuel cell concentration sensor
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United States of America Patent
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Mar 4, 2003
Grant Date -
N/A
app pub date -
Nov 8, 1999
filing date -
Nov 8, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The measuring range of a fuel cell based concentration sensor can be extended by decreasing the load across the fuel cell terminals and by increasing the amount of oxidant supplied to the fuel cell. In this way, such a sensor avoids saturation, for example, when measuring methanol concentrations from 0 M to over 4 M in liquid aqueous solution. Such a sensor is suitable for use in measuring fuel concentrations in the recirculating fuel stream of certain fuel cell stacks (for example, direct methanol fuel cell stacks).
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