531 considerations for application for cost reasons

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Unformatted text preview: rsally as an inductive proximity sensor. On the other hand, capacitive proximity sensors are sensitive to the effects of humidity in the active zone. Many manufacturers, for instance, use an auxiliary electrode to reduce the effects of moisture, dew or ice thus compensating these disturbances. 5.3.1 Considerations for application • For cost reasons, the use of inductive as opposed to capacitive proximity sensors is generally preferred to detect metallic objects. • For the detection of non-metallic objects, optical proximity sensors compete as a viable alternative. • There is a particular field of application where the use of capacitive sensors provides a distinct advantage. 5.4 Examples of application Capacitive proximity sensors for instance are suitable for monitoring filling levels of storage containers. Other areas of application include the detection of non-metallic materials. Detection of matt, black objects These objects can be made of rubber, leather, plastic and other materials, which are not detected by diffuse optical sensors and where ultrasonic proximity s...
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