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Capacitive & Proximity Sensor
NXP Semiconductors' capacitive sensors are advantageous in a wide variety of applications, and work based on the fact that the human body can hold a charge and act as capacitors. They can be covered with almost any nonconductive material and stay operational. This is because these materials have a dielectric constant, which doesn't allow current to flow, but does allow the energy field lines to penetrate the material in order to register the touch through the material. Materials with a higher dielectric constant tend to work best as a cover, and benefits hermetically sealed applications.
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