×

Amperometric measuring device having an electrochemical sensor

  • US 5,393,399 A
  • Filed: 09/07/1993
  • Issued: 02/28/1995
  • Est. Priority Date: 09/07/1992
  • Status: Expired due to Fees
First Claim
Patent Images

1. An amperometric sensor device for measuring the content of an oxygen reducible substance in a liquid, having in combination a sensor having a planar structure obtained by photolithograpic techniques and a circuit for measuring the intensity of the electrochemical current generated by said sensor, said structure comprisingan insulating substratea set of electrodes composed of at least one working electrode., one counter electrode and one reference electrode, at least said working electrode being disposed on said insulating substrate,said working electrode having an active surface only defined by a conductive part at the surface of said substrate, said device further comprising a diffusion membrane covering said conductive part of said working electrode While Overlapping the entire periphery of said conductive part, andconnection means to connect said electrodes to said measuring circuit,said diffusion membrane, said reference electrode and said counter electrode being entirely exposed so that, when said device is functioning, they are in contact over their entire surfaces with the liquid to be analyzed.

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