In the beverage industry, the reliable detection of crown caps is a crucial step in ensuring process reliability and product quality. Sensors take on the task of presence check and ensure that only correctly closed bottles pass through the filling and packaging line.
Inductive sensors with correction factor 1 are particularly suitable for detecting metal objects such as crown caps. With large switching distances and high switching frequencies, they reliably detect the closure, regardless of contamination or ambient conditions. However, the prerequisite is that the material of the crown caps remains constant, as different materials (e.g. sheet steel or aluminum) can influence the switching distance.
In a practical test setup, the application was tested with a sensor at a switching distance of 20 millimetres: The sensor only reacts reliably to the metal crown cap and switches as soon as the cap is within the range.
If the bottle position on the conveyor belt can fluctuate or if there are special hygiene requirements, fork sensors are an alternative. They detect the crown cap regardless of the material and provide stable switching signals even with transparent or reflective surfaces.
Stainless steel housing variants with degree of protection IP69K are particularly suitable for use in the beverage industry: They can withstand high-pressure and chemical cleaning and ensure long-term reliable function even in hygienically sensitive areas.
Whether inductive or optical: Various sensor technologies from wenglor are available for reliable crown cap detection on bottles:
Both approaches can be used to implement a safe, efficient and process-stable solution for applications in the beverage industry.
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