METHOD AND DEVICE FOR NONDESTRUCTIVELY TESTING FLUID-FILLED CONTAINERS FOR LEAKTIGHTNESS

摘要

The invention concerns a method and corresponding device for nondestructively testing fluid-filled containers for leaktightness. The containers (17) to be tested are held ready in an evacuated receptacle (2) which is connected to a vessel (1, 1a - 1d) in which a gas discharge can be carried out. When the volatile contents of the container are discharged by means of a leakage in a container, the brightness of the gas discharge is noticeably reduced with respect to the brightness in the initial situation when only the residual gas molecules in the air are present in the vacuum. This change in brightness, detected by light-sensitive sensors (9), is proportional to the concentration of the volatile substances, such that, on the basis of a calibration curve, an evaluation circuit (10) can immediately provide information about the concentration of the respective substances.