Thermography

Induction thermography is a non-destructive and contact-free testing method for detecting surface cracks in electrically conductive materials. Local distortions in eddy currents caused by cracks lead to temperature changes that are captured by infrared cameras, making defects visible through thermal imaging.

In induction thermography, a high-frequency induction coil generates eddy currents in the surface of the test material. Surface defects interrupt this current flow, creating local temperature increases that are visualized by infrared cameras. The method is suitable for a wide range of applications — from hot-rolled semi-finished products to complex-shaped components.

As a contactless and automatable process, induction thermography enables rapid and comprehensive surface inspection with high resolution. FOERSTER thermography systems combine induction heating, infrared imaging, and intelligent evaluation algorithms to ensure reliable, reproducible results in both industrial production and maintenance testing.

Application Examples

Product portfolio

NDT COMBICELL

Hybrid test system with automatic part handling for non-destructive testing

DEFECTOVISION CT

Non-destructive and contact-free crack detection for components with complex geometries

DEFECTOVISION IR

Inductive heat flux thermography for testing tubes, billets, rails, and profiles