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Gas detection device and method for detecting gas

  • US 4,457,161 A
  • Filed: 04/07/1981
  • Issued: 07/03/1984
  • Est. Priority Date: 10/09/1980
  • Status: Expired due to Term
First Claim
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1. A gas detection device for detecting concentration of any one of predetermined different gases in a gas mixture, said device comprising a substrate, a plurality of gas adsorbing sensors formed on said substrate, each of said sensors having different gas selectivities to the gases in the gas mixture, the number of said sensors being equal to the number of the different gases to be detected, at least two sensors being sensitive to at least two gases but having different sensitivities to said at least two gases, and each of said sensors adapted to provide an output having one or more output components, each component having a dimension of electrical conductivity and being proportional to the concentration of one of said different gases within a predetermined range of temperature of the sensor, said output of each sensor being the sum of said one or more output components, and means for computing the gas concentration of said any one of predetermined different gases using the outputs of said sensors produced at a temperature within said range.

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