Practical guidance for selecting instruments, understanding measurement methods, and improving inspection workflows.
Coatings on concrete, wood, plastic, glass and fibreglass cannot be measured by magnetic induction or eddy current; they require ultrasonic coating thickness measurement to ASTM D6132-13(2022) or ISO…
SSPC-PA 2-2022 is the US painting acceptance procedure. It specifies the number of spots by coated area, the reading requirement per spot, and pass/fail judgment based on the…
ASTM D7091-22 and SSPC-PA 2-2022 sort coating thickness gauges into two types: Type 1 magnetic pull-off and Type 2 electronic. Type 2 gauges read electronically through magnetic induction…
The 80/20 rule is the shared acceptance method of SSPC-PA 2 and ISO 19840: the area mean ≥ nominal thickness, fewer than 20% of readings in the 80%-100%…
Resolution is the smallest displayed step, accuracy is how far a reading can sit from the true value, and repeatability is how well repeated measurements at one spot…
ISO 2178:2016 specifies the magnetic method for measuring the thickness of non-magnetic coatings (paint, galvanizing, powder, enamel, etc.) on magnetic substrates (steel, iron); the Chinese equivalent is GB/T…
The geometry of the part changes the reading systematically: a substrate that is too thin pulls the reading low, curvature changes the coupling between probe and substrate, and…
ISO 2360:2017 specifies the amplitude-sensitive eddy-current method for measuring non-conductive coatings (paint, anodized film, plastic, powder, enamel) on non-magnetic conductive metal substrates (aluminium, copper, brass, austenitic stainless steel);…
Transmittance measures the share of visible light that passes through a material (VLT), haze measures the scattered fraction of that transmitted light, and gloss measures the specular reflection…
