Patents Assigned to Oliver Haugen
  • Moisture sensor having low sensitivity to conductance changes
    Patent number: 5859536
    Abstract: A sensing device includes a pair of sensing electrodes disposed within a medium and a circuit connected to the sensing electrodes via impedance matching networks for producing an output signal which varies in response to a capacitive change in the medium. The circuit includes a first circuit portion including the sensing electrodes and a second circuit portion including the oscillator. The first and second circuit portions are tuned to match their impedance for more accurately measuring the capacitive changes.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: January 12, 1999
    Assignee: Oliver Haugen
    Inventor: Paul Stockton