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Reliable Detection of Clear Bottles

R201 Retroreflective Sensors Ensure Efficiency in High-Output Bottling Plants

The Application

In the beverage industry, tens of thousands of bottles can be filled every hour in high-output bottling plants. High-speed conveyor belts supply an endless flow of materials. Bottles made from clear glass are just as common as transparent PET bottles. To ensure reliable filling processes and high productivity, error-free bottle flow monitoring, bottle counting, and congestion control are required in the infeed area to the fillers.


The Goal

The bottles that are transported along the conveyor belt must be reliably detected. The transparency of the objects is just one of the challenges facing the sensors. They also need to be able to reliably suppress any mirroring from the curved surfaces of the bottles, and other optical interference. Incorrect switching and incorrect bottle counting must be prevented—even during high-speed operation.


The Solution

R201 series retroreflective sensors have proven highly effective at detecting transparent objects under dynamic process conditions. Aligned with a reflector that is located behind the bottle flow, the sensor detects clear glass and PET bottles with absolute accuracy. Each individual bottle is detected—any gaps in the flow of bottles can be reliably detected.



Its impressive detection capabilities and interference-resistance make the R201 a suitable solution in bottling plants.

The Benefits

The R201 retroreflective sensor offers impressive detection and interference-resistance when detecting and counting transparent objects, even with wide detection ranges. The same is true of R200 series retroreflective sensors and spacesaving R100, R101, and R103 series. Regardless of size, all series offer the same sensing modes, standard configurations, and one user interface—for maximum efficiency and reliability.


R201 at a Glance

  • R201 retroreflective sensor with reflector for interference-free recognition of transparent objects
  • Reliable detection and counting of glass bottles
  • IO-Link with Smart Sensor Profile for simple configuration, diagnostics, and maintenance
  • All photoelectric sensing modes in five standard housings for maximum flexibility and a variety of integration possibilities

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