Chemiresistor sensor system compensated for temperature and...

G - Physics – 01 – N

Patent

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G01N 27/12 (2006.01)

Patent

CA 2636414

A chemiresistor sensor system compensated for temperature and aging effects is disclosed and includes a sensing element exposed to an atmosphere of an ambient environment to be monitored for the presence and/or concentration of a flammable vapor and a temperature compensation element which is isolated from the atmosphere of the ambient environment. The sensing element and the temperature compensation element are electrically connected in series and have similar performance in response to temperature changes and temperature cycling. The output of the chemiresistor sensor system, which is the voltage drop across the sensing element, remains unchanged despite the changes in resistance of the sensing element in response to temperature changes. Therefore, the chemiresistor sensor system can more accurately and consistently detect the presence of flammable vapor in environments subject to temperature changes and/or over long periods of time.

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