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  • Dielectric Materials for Use in Radomes
    Polyurethane Foam: Dielectric Materials for Use in Radomes and Other Applications. Many polyurethane foams offer a wide variety of physical properties, as well as desirable dielectric properties for applications requiring minimal dielectric constant and loss tangent. In many such applications
  • The Capacitive Humidity Sensor - How it Works & Attributes of the Uncertainty Budget
    The humidity sensor is a small capacitor consisting of a hygroscopic dielectric material placed between a pair of electrodes. Most capacitive sensors use a plastic or polymer as the dielectric material, with a typical dielectric constant ranging from 2 to 15. When no moisture is present
  • 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
  • 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
  • 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

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