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Liquid nitrogen dosing

Verifying liquid nitrogen dosing

Gasporox offers solutions for quality inspection of beverages so that you can safely say that the beverage is up to best standard. 

Beverages can be filled into various types of containers like glass bottles, PET bottles, cans, laminated cartons, pouches and bag-in-box, depending on type of beverage. One important factor in the quality control process can be to verify the nitrogen in the headspace.

PET bottles are used for many types of beverages. The reduction of plastic material on PET bottles has a positive effect on the weight, cost, sustainability and waste reduction. With this reduction of the material, the bottles tend to be soft and handling becomes more difficult. An overpressure in the bottle generates a hard bottle. This gives the beneficial conditions using them over the product lifecycle. Non-carbonized beverages, like still water bottles, do not generate an increased pressure by default. A drop of liquid nitrogen is applied before closing the bottle, to generate the requested overpressure. The GasSpect H2O & Bar sensor is used to perform a 100% measurement of each bottle running on the filling line. The verification of the pressure in the bottle confirms the correct liquid nitrogen application and detects leaks.

Application description

The bottles are transported on a round conveyor system and passing the laser beam of the sensor. The laser light is sent through the headspace of the bottle and the water vapor absorption is analyzed. The physical effect of line broadening is used to accurate and fast measure the pressure in the bottle. Read more in the application note

Technology

The Gasporox optical gas sensors are built on more than 25 years of development and refinement in industrial laser-based gas measurement. The system uses Tunable Diode Laser Absorption Spectroscopy (TDLAS), a highly reliable and precise method for non-destructive headspace gas analysis.

Developed by Gasporox in collaboration with its technology partners, this laser sensor technology is widely used in demanding industries such as pharmaceuticals, petrochemicals, and energy.

Gasporox’s laser-based headspace analysis has been successfully deployed for over a decade in pharmaceutical manufacturing. It is integrated into fully automated inspection systems and benchtop instruments for 100% in-line and laboratory testing of vials, ampoules, and other parenteral packaging formats. The performance and robustness of the system have been validated through extensive real-world use.

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