Freeze Drying

Freeze-drying gently removes moisture from temperature- and structure-sensitive products such as food or vaccines. The physical phenomenon of sublimation means a direct transition from a solid to a vaporous state, bypassing the liquid aggregate state. The frozen product is dried in a precisely controlled vacuum without thawing. The process offers a wide range of possible applications.

Challenge

In view of expensive product batches and high operating costs, the vacuum transducers used must meet particularly high standards of reproducibility and reliability to avoid production downtimes.

Solution

The VCP Pirani vacuum transducer has a helix platinum rhodium filament and is therefore suitable or demanding applications, even with aggressive media in the range of 100 ... 5e-4 mbar. The relatively smooth surface of the material reduces deposits of oil vapors or other impurities and thus ensures a particularly long service life of the filament, as proven by field tests in critical applications. The sensor can even withstand steam sterilization. The metal-sealed measuring cell and the stainless steel flange also contribute to the increased durability of the transducer.

Using the VCP improves process reliability while simultaneously reducing maintenance costs.

One of the world´s leading companies in the field of development and production of freeze dryers has trusted in the quality and precision of our vacuum sensors for many years.