Magnetic vs Eddy Current Coating Thickness Gauge

If the work is focused on paint, powder coating or similar non-magnetic coatings on steel, a ferrous-focused route is usually the simplest and most cost-effective.

• PosiTector 6000 GP configured with an F probe is a strong choice for established coating inspection on steel.
• PosiTector 6000 FLS is the better fit when thicker coatings or galvanising-type applications push the normal range.
• MiniTest 725 is a stronger route when users need stored readings and wireless workflow support for documented inspection work, not just spot checks.
• DCF-3000FX is a compact route for straightforward ferrous coating measurement.
• DCF-3000PRO is the better route when premium accuracy is a buying priority.
• MikroTest remains relevant when a no-battery magnetic pull-off route is preferred for simple spot checks.

If the work is consistently on aluminium, copper, brass or similar non-ferrous conductive substrates, eddy-current-only models can be the cleaner buying route.

• PosiTector 6000 AN is a direct route for paint or anodising on non-ferrous metals.
• DCN-3000FX is a compact non-ferrous option for routine measurement work.
• DCN-3000PRO is the better route when tighter claimed accuracy is the priority.

If the same user moves between steel and aluminium, or the substrate is not always known in advance, dual FN gauges reduce buying risk and simplify field use.

This is also the safer route for many automotive repaint-check workflows, where one vehicle may include both steel and aluminium body panels. If plastic panels also need coating-thickness measurement, an electromagnetic gauge alone will not cover the full job and an ultrasonic route may be needed alongside it.

• PosiTector 6000 GP is a strong all-round dual route for mixed-substrate inspection.
• PosiTector 6000 MP is better suited to small parts or more confined measurement areas.
• PosiTector 6000 IP suits buyers who want integrated one-handed operation.
• MiniTest 725 with FN capability is a stronger route when workflow features matter as much as the substrate flexibility.
• MiniTest 745 is the stronger choice for higher-capacity, probe-flexible production or QA environments.
• MiniTest 2500/4500 is the route to take when the workflow is clearly moving toward interchangeable sensors and higher-volume data handling.
• DCFN-3000FX, DCFN-3000PRO, DCFN-3000EZ, PaintCheck and PosiTest DFT-FN give different price and simplicity routes within the same dual-substrate decision.

If the real challenge is the substrate and coating combination rather than just ferrous versus non-ferrous, continue with Select a Coating Thickness Gauge by Substrate. If the purchase is being driven by a recognised inspection standard, go to Coating Thickness Gauges by Standard.

Browse all Coating Thickness Gauges to compare the ferrous, non-ferrous and dual-model routes in one place.

• Magnetic vs Eddy Current: Principles & Differences
• Substrates & Coating Types (Fe / NFe / Duplex)