The ultrasonic measurement method allows measuring a detail with just the support of the probe, without the need for any feedback on the opposite side.

Ultrasonic thickness gauges determine the thickness of a material by accurately calculating the time required by an ultrasound pulse generated by the probe to pass through the thickness of the sample, and finally be reflected on the opposite surface and return to the probe.

They are instruments for measuring thicknesses, corrosions, splitting materials, sheets, coated materials, if they are homogeneous material that does not have cracks, air bubbles or defects that prevent the correct propagation of ultrasound. These tools, depending on the model, have decimal, centesimal and millesimal resolution. They do not damage the measured sample; therefore, they are considered as non-destructive testing tools.