. The metal plate in the end of the
sensor electrically connects to the oscillator, and the object to be sensed acts as the second plate. When this
sensor receives power, the oscillator detects the external capacitance between the target and the internal
sensor plate. This arrangement completes the
circuit and provides the necessary feedback path for the output
circuit to evaluate. Capacitive sensors can detect many different kinds of objects. For example, solids, liquids, or granular targets...
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