Capacitive proximity sensors are non-contact devices that can detect the presence or absence of virtually any object regardless of material. They utilize the electrical property of capacitance and the change of capacitance based on a change in the electrical field around the active face of the sensor.
Capacitive sensing technology is often used in other sensing technologies such as:
flow
pressure
liquid level
spacing
thickness
ice detection
shaft angle or linear position
dimmer switches
key switches
x-y tablet
accelerometers
It is a component widely used in automatic control industry for detecting, controlling, and non-contact switching.
When proximity switch is close to some target object, it will send out control signal.
It’s widely used in machine, paper making, light industry for limiting station, orientation taking count, speeding trial etc.
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