What type of sensor should be used for metallic and nonmetallic objects?

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Multiple Choice

What type of sensor should be used for metallic and nonmetallic objects?

Capacitive proximity sensors detect a nearby object by measuring changes in capacitance between the sensor and the target. Any material with a dielectric constant different from air—metal or nonmetal—causes a detectable change, so a capacitive sensor can sense both metallic and nonmetallic objects within its sensing range. Inductive sensors work mainly with metals, optical sensors depend on light and can be unreliable with some surface colors or transparencies, and ultrasonic sensors sense by sound and are more distance-focused. So, when you need to detect either metal or nonmetal targets with a single sensor, capacitive proximity sensing is the best fit.

Capacitive proximity sensors detect a nearby object by measuring changes in capacitance between the sensor and the target. Any material with a dielectric constant different from air—metal or nonmetal—causes a detectable change, so a capacitive sensor can sense both metallic and nonmetallic objects within its sensing range. Inductive sensors work mainly with metals, optical sensors depend on light and can be unreliable with some surface colors or transparencies, and ultrasonic sensors sense by sound and are more distance-focused. So, when you need to detect either metal or nonmetal targets with a single sensor, capacitive proximity sensing is the best fit.

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