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Gas sensor and sensing device

  • US 5,522,980 A
  • Filed: 03/10/1995
  • Issued: 06/04/1996
  • Est. Priority Date: 03/24/1994
  • Status: Expired due to Fees
First Claim
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1. A carbon dioxide gas sensor comprising a gas sensing device including a capacitor having spaced conductors;

  • an aqueous electrolyte defining a relative dielectric constant and into which carbon dioxide dissolves and thereby changes the relative dielectric constant of said electrolyte, and wherein said spaced conductors are associated with but electrically insulated from said electrolyte;

    means for holding said electrolyte adjacent said conductors; and

    monitoring means for monitoring one of a resistive component and a capacitive component of said relative dielectric constant of said electrolyte independently of the one of said resistive and capacitive components.

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