PERMITTIVITY-BASED MATERIAL SENSOR
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United States of America Patent
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Issued Date -
Oct 23, 2008
app pub date -
Apr 20, 2007
filing date -
Apr 20, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system for sensing a presence and/or a concentration of a target substance in a fluid has a sensor and a processor coupled to the sensor. The sensor has a test probe having at least first and second test electrodes, wherein at least the first test electrode is functionalized to create a permittivity change in the area between the first and second test electrodes in the presence of the target substance. The sensor also has a reference probe having at least first and second reference electrodes. The processor is configured to determine at least one permittivity-based metric for the test probe; determine the at least one permittivity-based metric for the reference probe; and determine the presence and/or the concentration of the target substance based on the at least one permittivity-based metric for the test probe and the at least one permittivity-based metric for the reference probe. Related methods are disclosed.
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