Adjustable sensor or sensor network to selectively enhance identification of select chemical species

A contaminant detection system configured to provide a plurality of voltages from a voltage source to a sensor, wherein the voltage source provides the plurality of voltages to the sensor in a continuous, multiple sweeping fashion over a range of voltages that includes first and second voltages that are different from one another, the system comprising:

• the sensor configured to respond to the first voltage and a second voltages;
• wherein, in response to the first voltage, the sensor provides a first resistance response;
• wherein, in response to the second voltage, the sensor provides a second resistance response that is different from the first resistance response;
• a controller configured to receive signals from the sensor;
• a look up table, which is accessible by the controller, and having data relating to contaminant name, contaminant concentration, contaminant source, sensor response, and applied voltage;
• wherein, in response to determining that the first resistance response meets or exceeds a first threshold based on the sensor sending a first resistance signal to the controller, the controller determines a presence of a first contaminant and a source of the first contaminant;
• wherein, in response to determining that the second resistance response meets or exceeds a second threshold based on the sensor sending a second resistance signal to the controller, the controller determines a presence of a second contaminant and a source of the second contaminant;
• wherein, in response to determining the source of the first contaminant, the controller commands a first adjustment device outside of the contaminant detection system to adjust the source of the first contaminant;
• and
• wherein, in response to determining the source of the second contaminant, the controller commands a second adjustment device outside of the contaminant detection system to adjust the source of the second contaminant.