Practical guidance for selecting instruments, understanding measurement methods, and improving inspection workflows.
Coatings on concrete, wood, plastic, glass and fibreglass can only be measured by ultrasonics (ASTM D6132-13(2022) / ISO 2808); the matching Dongru models are DR200A (concrete/mortar, 40-1200μm) and…
ASTM D7091-22 breaks gauge use into three steps: Calibration (done once by the manufacturer or a lab), Verification (performed by the operator every shift), and Adjustment (done on…
US window tint is legislated state by state; the most common front-side limit is 35%, with some states requiring 50% or 70%. Because factory glass transmits about 70%,…
The base metal reading (BMR) is the “false thickness” measured on bare substrate, coming from surface roughness, substrate material and geometric curvature; both SSPC-PA 2 and ISO 19840…
Coating thickness measurement spans ASTM (D7091, D6132), SSPC/AMPP (PA 2), ISO (2178, 2360, 2808, 19840, 12944) and NIST traceability systems; the rule is pick the standard family by…
SSPC-PA 2-2022 uses a two-level sampling plan: spot measurement (the average of no fewer than 3 readings within a roughly 1.5-inch diameter circle) and zone statistics (number of…
The two “passes” into the professional market are a traceable calibration certificate and a declaration of conformity to standards; also, products with wireless modules need FCC certification in…
ISO 12944 is a set of 9-part specifications for anti-corrosion paint systems on steel structures: Part 2 defines atmospheric corrosivity categories C1 (very low) to C5 (very high…
Shim verification is the every-shift action required by ASTM D7091-22: place a shim of known thickness on bare substrate, and the reading versus nominal must fall within tolerance;…
