×

Electrochemical multigas sensor

  • US 5,932,079 A
  • Filed: 12/09/1997
  • Issued: 08/03/1999
  • Est. Priority Date: 06/07/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. An electrochemical measuring cell for the simultaneous detection of different gas components in a gas sample, the measuring head comprising:

  • a diffusion barrier;

    a plurality of measuring electrodes behind said diffusion barrier;

    a common reference electrode comprised of a sintered mixture of metal and its metal oxide;

    a common counterelectrode;

    an acid electrolyte, said common reference electrode and said common counterelectrode being in said acid electrolyte;

    a potentiostatic evaluating circuit maintaining electric potentials of said measuring electrodes at a predetermined value relative to said reference electrode independently from one another for the combined detection of CO and O2, wherein one of said measuring electrodes is a CO-measuring electrode with an electric potential relative to said reference electrode set at a value of about 0 mV to 300 mV; and

    one of said measuring electrodes is an O2 -measuring electrode with an electric potential set at a value between -300 and -800 mV.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×