14 Dec 2023


The PCS 700 IoT performs in-line bottle leak detection for beverage industry using laser spectroscopy

The PCS 700 IoT detects leaks and micro leaks of a bottle by an innovative application of laser spectroscopy

Sealing every cap perfectly is essential to ensure the quality and shelf life of a bottled product, and direct in-line measurements are the most effective way to be sure of control. The PCS 700 IoT verifies in-line the presence of leaks and micro leaks from the cap through direct pressure measurement using laser spectroscopy.

How does laser spectroscopy work to identify leaks and micro leaks in bottles?

A laser beam is positioned at the same height as the bottles’ headspace, so the total or partial pressure can be measured in line as the bottle passes over the belt. The physical property of certain molecules in the gaseous state to absorb light only from specific, defined wavelengths is exploited to take the measurement, making it possible to identify which molecule to monitor in the headspace of the closed container and to obtain very fast and accurate measurements of total or partial pressure. This also makes it possible to take measurements of diverse types of bottled products with different filling/storage gases.

Applications of the technology

Possible applications include the following:

  • Products with added nitrogen: Bottled water and other beverages to which nitrogen is added to remove air from the headspace or to keep the container under pressure and prevent PET bottles from damage during palletisation and transport. The presence of water vapour molecules in the headspace is used to control the nitrogen pressure online; this makes it possible monitor the operation of the nitrogen dispenser, stabilise the pressure inside each bottle, and detect under- or over-pressurised bottles (by comparing them to a standard pressure value), which can cause faults on the cap.
  • Hot-filled products: The most common application is hot-filled fruit juices in glass bottles with twist-off caps. The degree of vacuum in the headspace is measured directly inside the closed container, making it possible to detect products with imperfect closures.
  • Carbonate products (CSD): All carbonate products can be measured using the presence of CO2 molecules in the headspace. The solution is placed immediately after the pasteurisation phase (for beer and other pasteurised beverages), or away from the filling machine.

Advantages of the technology and benefits for producers

The PCS 700 IoT directly measures the pressure inside the headspace of closed containers. This enables reliable and accurate measurement of microleaks from the cap for even the smallest pressure variations. It guarantees product quality, shelf life, perfect container closure, and fewer false rejects than acoustic or vision systems. Other direct benefits of the solution include brand protection and fewer customer and consumer complaints.

The PCS 700 IoT, like all Antares Vision Group inspection machines, is part of our DIAMIND Line suite. DIAMIND is the most intelligent and integrated ecosystem of solutions that runs at the line, plant, warehouse, company, and supply chain levels, enabling a data-driven, tailored journey to digital innovation.

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