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Innosen Develops Coating Thickness Gauge to Test Narrow Diameter of Aerosol Cans

Written by: Canmaker Magazine
Original Link: Canmaker Digital Magazine
Published: April 2025

Innosen has unveiled a new internal coating testing device for small-diameter cans. 

The Tube Probe can test lacquer thicknesses for formed impact-extruded aerosol cans of up to 67mm, as well as aluminum tubes.

The equipment consists of a probe tip that has been narrowed and lengthened from the company’s existing equipment to accommodate the deeper curvature of smaller containers.

A regular probe tip is too large to make a satisfactory connection with the internal can surface, rendering readings unsafe, said Innosen President Luc Nelen, explaining that the new product fills a gap in the market.

“This has never been done before,” Nelen told The Canmaker at Cannex Fillex de las Américas.

Another innovation is the ability to adjust the distance between the probe and electrode to accommodate the deep neck of formed ipact-extruded can.

Lacquer thickness is crucial to the safety and integrity of cans. Spray it too thinly and the can’s contents could damage the metal; layer it too thick and the coating could debond from the body.

The probe is also long enough for customers to check the coating thickness at different distances along the can body and to rotate to check lateral application.

Innosen can be found at booth 922.

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