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Figure 2 shows a situation, where the ambient capacitance value does not change. The ambient capacitance changes constantly and is unpredictably due to changes in humidity and temperature. If the ambient capacitance value changes sufficiently, it can affect the sensor activation.
Terms:
dielectric= An electrically insulating or nonconducting material considered for its electric susceptibility, i.e. its property of polarization when exposed to an external electric field.
capacitance= theThe property of being able to collect a charge of electricity.
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