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  • No-static plastics
    . The main goal with ESD materials is controlling the charge during an ESD event. The best materials for the job are conductive with a high dielectric constant. Ordinary plastics are insulators, materials that prevent the flow of electrons across their surfaces or through their volumes. This contrasts
  • Capacitive sensors
    electrostatic field. A nonmetallic target entering the field increases the dielectric constant between the plates, raising the amplitude of the oscillations. The higher amplitude triggers a level detection circuit to turn the output of the sensor on. It turns off again when the target leaves
  • Layout and Physical Design Guidelines for Capacitive Sensing
    , but the dielectric constants are on the order of 2- adjacent buttons. When a person touches a sensor, or 3 for acrylics and about 7 for window glasses. Other its covering plate (plastic, glass, etc.), the person's fin- notable substances have dielectric constants of 1 for air ger
  • Electromagnetic NDT Testing
    electrical properties to the surrounding base material cause partial reflection of the waves. 2D and 3D images are created using the reflected waves that return to the surface. GPR methods can detect metal and non-metal objects or discontinuities when changes in dielectric constant occur in the material
  • Proximity Sensors
    be suitable for a plastic target; an inductive sensor requires a metal target. In capacitive proximity sensors, the sensed object changes the dielectric constant between two plates. Sensing range is usually quoted relative to water. Because changes in capacitance take a relatively long time

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