In Multiple Echo mode with the Deep Coat turned Off the gauge
can measure through most protective coatings up to 3 mm (0.11”)
thick when using a S2C type probe. Coatings like paint, anti-foul,
hard plastics and epoxy should present no problems as long as
they have not de-laminated/de-bonded from the metal surface.
In Multiple Echo mode with Deep Coat turned On will allow the
gauge to measure through coatings over 3mm (0.11”) thick up to
a maximum of around 20 mm (0.78”) depending on the properties
of the coating material.
Measuring through thick coatings is ultimately limited by how well
the coating material allows the ultrasound to pass through, soft