text: * One application for such a device is measuring the water content of soil, where the volume of water in the total volume of soil most heavily influences the dielectric permittivity of the soil because the dielectric of water (80) is much greater than the other constituents of the soil (mineral soil: 4, organic matter: 4, air: 1). When the amount of water changes in the soil, a probe will measure a change in capacitance due to the change in dielectric permittivity that can be directly correlated with a change in water content.  Capacitance sensors are now widely used in irrigation scheduling in agriculture around the world.
  * Cure monitoring of Composite materials: Dielectric or capacitance sensors are used to measure the electrical response of thermoset resins and matrices of composite materials at specified depth over the sensor surface. The key model involved in the use of these sensors is the electric field model. The correspondence between electrical properties of the material within the field and the measurement (i.e. capacitance) is fundamental in interpreting the readings from the dielectric sensor.
  * Tip clearance measurement in turbomachinery testing.
  * The capacitance-sensors also can be used for the measuring of level of some solid materials in structures such as hoppers or silos.