Patents Assigned to Advanced Sensor Technologies, Inc.
  • Sensor for measuring moisture and salinity
    Patent number: 7482820
    Abstract: A sensor for measuring the moisture and salinity of a material is disclosed herein. The sensor preferably includes a soil moisture circuit, a soil salinity circuit and a probe structure. The soil moisture circuit includes a high frequency oscillator, a voltage meter and a reference capacitor. The soil salinity circuit includes a low frequency oscillator, a voltage meter and a reference resistor. A third voltage meter allows for voltage outputs to be measured to calculate soil moisture and soil salinity values.
    Type: Grant
    Filed: August 3, 2008
    Date of Patent: January 27, 2009
    Assignee: Advanced Sensor Technologies, Inc.
    Inventor: Jeffrey Campbell
  • Sensor for measuring moisture and salinity
    Patent number: 7408364
    Abstract: A sensor for measuring the moisture and salinity of a material is disclosed herein. The sensor preferably includes a soil moisture circuit, a soil salinity circuit and a probe structure. The soil moisture circuit includes a high frequency oscillator, a voltage meter and a reference capacitor. The soil salinity circuit includes a low frequency oscillator, a voltage meter and a reference resistor. A third voltage meter allows for voltage outputs to be measured to calculate soil moisture and soil salinity values.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: August 5, 2008
    Assignee: Advanced Sensor Technologies, Inc.
    Inventor: Jeffrey Campbell