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Package Detection in Beverage Return Machines with Retro-Reflex Sensor for Transparent Objects

Automatic return machines have a central, circular opening for receiving containers. In order to link with subsequent processes (e.g. belt start-up, deposit logo check), a multi-beam retro-reflex sensor for transparent objects is located directly behind the drop-in. This ensures that beverage packaging made of PET, glass, aluminum or sheet metal is reliably detected. Thanks to the four red light beams, even small containers without blind spots are detected. The dynamic readjustment of the switching threshold enables reliable switching, even with increasing contamination of the sensor or reflector.

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Retro-Reflex Sensors for Transparent Objects

In addition to detecting glossy, chrome-plated or reflective surfaces, retro-reflex sensors for transparent objects also detect and count transparent objects such as glass or film using red light. Objects are detected by interrupting the light beam between the sensor and the reflector.

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