Patents by Inventor Heinz Wohlrab

Heinz Wohlrab has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electrochemical sensor for measuring the oxygen partial pressure in a process fluid and a method for testing its function
    Patent number: 8815077
    Abstract: An electrochemical sensor for measuring the oxygen partial pressure in a process fluid, comprises an electrolyte-filled sensor body, which is covered on one side charged with the process fluid by an oxygen-permeable membrane, a cathode on the membrane, an annular guard electrode surrounding the cathode, which in measuring operation lies at the same potential as the cathode, an anode charged by the electrolyte in the sensor body, a reference electrode charged by the electrolyte in the sensor body, wherein between the anode and cathode a voltage can be applied, which is controlled between the cathode (8) and reference electrode at a constant polarization voltage and the measuring sensor current flowing in measuring operation between the cathode and anode is a measure for the oxygen partial pressure in the process fluid, and a test voltage source which can be switched in a testing mode between the cathode and guard electrode for producing test oxygen in the electrolyte and/or in the process fluid between the
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: August 26, 2014
    Assignee: Knick Elektronische Messgeräte GmbH & Co. KG
    Inventors: Heinz Wohlrab, René Oberlin
  • ELECTROCHEMICAL SENSOR FOR MEASURING THE OXYGEN PARTIAL PRESSURE IN A PROCESS FLUID AND A METHOD FOR TESTING ITS FUNCTION
    Publication number: 20120125790
    Abstract: An electrochemical sensor for measuring the oxygen partial pressure in a process fluid, comprises an electrolyte-filled sensor body, which is covered on one side charged with the process fluid by an oxygen-permeable membrane, a cathode on the membrane, an annular guard electrode surrounding the cathode, which in measuring operation lies at the same potential as the cathode, an anode charged by the electrolyte in the sensor body, a reference electrode charged by the electrolyte in the sensor body, wherein between the anode and cathode a voltage can be applied, which is controlled between the cathode (8) and reference electrode at a constant polarization voltage and the measuring sensor current flowing in measuring operation between the cathode and anode is a measure for the oxygen partial pressure in the process fluid, and a test voltage source which can be switched in a testing mode between the cathode and guard electrode for producing test oxygen in the electrolyte and/or in the process fluid between the
    Type: Application
    Filed: June 23, 2010
    Publication date: May 24, 2012
    Inventors: Heinz Wohlrab, René Oberlin