Vacuümvrij

Vacuümvrij is a Dutch term that translates to "vacuum-free" in English. It refers to a state or condition where a vacuum, which is a space devoid of matter, is not present. In scientific and technical contexts, achieving a perfect vacuum is often a goal, but many processes and environments operate under conditions that are not entirely vacuum-free. This means there is still some presence of gas molecules, however minimal.

The concept of vacuümvrij is often contrasted with vacuum conditions. For example, in industrial processes, a vacuum chamber might be used to create a low-pressure environment. If this environment is described as vacuümvrij, it implies that the pressure is higher than a true vacuum, or that a vacuum was not achieved or maintained. Similarly, in everyday life, most enclosed spaces are vacuümvrij, as they contain air at atmospheric pressure.

The degree to which a space is vacuümvrij can vary significantly. A sealed container with air inside is vacuümvrij. Even a space with a very low pressure, but still containing some gas, can be considered vacuümvrij in comparison to a near-perfect vacuum. The term is used to distinguish from situations where a vacuum is essential or has been intentionally created.