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Vacuum integrity of cans, jars, and bottles

After preserving jars are filled and closed they must be vacuum-tested in fully automatic
operation to immediately sort out any defective containers. During transport of the jars an eddycurrent sensor scans the cap shape that is generated by the vacuum in a non-contacting way. The subsequent electronic unit calculates cap bending, which directly depends on the internal pressure, with high accuracy. After comparing this
value with a specified permissible value range a decision is made about the quality of the internal pressure and thus about the tightness of the preserves container.

(MVA95)

Fitting sensors and products

Eddy current sensors for displacement and position

More application examples in Deflection, deformation, waviness

Load tests on aeroplane wings Planness measurement of display glass Measurement system for cut packaging pieces Flatness measurement in rolling mills Flatness inspection on ceramic wall tiles Monitoring the clamping of tools Machine tool clamping position