Vastagságmérk
Vastagságmérk, commonly translated as thickness gauge, is a device used to determine the thickness of a material or its coatings. It is essential in quality control, corrosion monitoring, and ensuring that products meet specified dimensions across manufacturing, construction, and maintenance settings.
- Ultrasonic thickness gauges (UT): measure thickness by sending ultrasonic pulses through the material and calculating thickness
- Magnetic induction gauges: suitable for ferromagnetic substrates; determine coating thickness by changes in magnetic flux or
- Eddy current gauges: used for non-ferrous substrates or certain metallic coatings; thickness is inferred from changes
- Capacitive gauges: measure non-conductive coatings on conductive substrates via capacitance changes.
- Optical thickness gauges: non-contact methods (confocal, interferometric, laser triangulation) for transparent or very thin coatings on
- Mechanical/dial gauges: direct contact measurements with a probe, useful for simple or in-process checks on small
Used in automotive, aerospace, shipbuilding, metal fabrication, and paint applications to verify coating thickness, detect excessive
Devices are calibrated against certified reference standards and are often traceable to national or international standards.
Accuracy can be affected by surface roughness, curvature, temperature, access to the surface, and the presence
Coating thickness measurement, nondestructive testing, ultrasonic testing.