The area of detection can be flexibly divided into

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Unformatted text preview: Transport systems • Food industry • Metal, glass and plastics processing • Monitoring of bulk material Ultrasonic proximity sensors have the following advantages: • Relatively large range (up to several meters) • Object detection irrespective of colour and material • Safe detection of transparent objects (e.g. glass bottles) • Relatively dust and dirt insensitive • Fading out of background possible • Outdoor application possible • Feasibility of contactless sensors with accurate variable switching points. The area of detection can be flexibly divided into zones. Programmable versions are available. Ultrasonic proximity sensors have the following disadvantages: • If ultrasonic proximity sensors are used for slanting object surfaces, the sound is deflected. It is therefore important that the object surface to be reflected is at a right angle to the axis of the sound propagation or to use ultrasonic barriers instead. • Ultrasonic proximity sensors react relatively slowly. Maximum switc...
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