×

Gas sensor

  • US 4,887,455 A
  • Filed: 04/05/1988
  • Issued: 12/19/1989
  • Est. Priority Date: 04/06/1987
  • Status: Expired due to Term
First Claim
Patent Images

1. A gas sensor for detecting the presence of a gas, the sensor comprising:

  • a layer of semiconducting organic polymer;

    means for applying an alternating electric signal to the layer;

    means for varying the frequency of said signal; and

    means for detecting the variation in impedance characteristics of said layer in the presence of said gas.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×