tyhjiötesti

Tyhjiötesti, also known as vacuum testing, is a non-destructive testing method used to detect leaks in sealed containers, systems, or components. It involves creating a vacuum within or around the item being tested and then monitoring for any pressure changes that indicate the presence of a leak. This method is widely employed in various industries, including automotive, aerospace, medical device manufacturing, and food packaging, to ensure product integrity and safety.

The fundamental principle behind tyhjiötesti relies on the difference in pressure. If a sealed object is placed in a chamber that is then evacuated, any leak present will allow ambient air or gas to enter the object, causing the internal pressure to increase. Conversely, if the object itself is sealed and then connected to a vacuum source, a leak will result in a loss of vacuum, indicated by a rise in pressure. Sensitive pressure sensors are used to detect even minute pressure fluctuations, allowing for the identification of small or slow leaks.

Different variations of tyhjiötesti exist depending on the application. Absolute pressure testing measures the internal pressure directly against a perfect vacuum. Differential pressure testing compares the pressure inside the test object to the ambient pressure or to a reference object. This method can be highly sensitive and is often used for leak detection in high-volume production environments. The accuracy and effectiveness of tyhjiötesti depend on factors such as the size of the leak, the duration of the test, and the sensitivity of the pressure measurement equipment.