ISO 12718:2019

Overview

ISO 12718:2019 is the international vocabulary for eddy current testing, a key method within non‑destructive testing (NDT). This second edition replaces ISO 12718:2008 and provides an updated set of standardized terms used in eddy current testing. The document covers general terminology and specific terms related to measurements, probes, equipment, application to the product under test, and evaluation of results. It also includes updates related to phased array technology definitions.

ISO and IEC maintain online terminology resources (ISO Online Browsing Platform and IEC Electropedia) referenced for use in standardization and harmonization of terms.

Key Topics

The standard is organized into clearly defined sections reflecting practical NDT activity:

• General terms specifically associated with the eddy current test method
• Measurement terms used for signals and measured quantities
• Probe terminology covering sensors and multi‑element (phased array) probes
• Equipment terms for instruments and data acquisition systems
• Application terms referring to how the method is applied to the product under test
• Evaluation terms for the interpretation and assessment of eddy current measurements

Key benefits of a common vocabulary include consistent reporting, reduced ambiguity in specifications, and clearer communication between inspectors, engineers, manufacturers, and regulators.

Applications

ISO 12718:2019 supports a wide range of practical uses in industry and NDT workflows:

• Inspection reporting: ensures standardized language in reports and certificates to avoid misinterpretation.
• Training and competence: provides instructors and trainees with an authoritative glossary for courses and certification schemes.
• Procurement and specifications: helps procurement teams and designers describe probe, instrument and testing requirements unambiguously.
• Software and data exchange: assists developers and integrators to map signal and equipment terminology for analysis and archiving.
• Technique development: clarifies definitions when updating procedures or integrating phased array and multi‑element probe technologies.

By harmonizing terminology, the standard improves consistency across inspections, acceptance criteria and cross‑border projects where multiple organizations collaborate.

Related Standards

ISO 12718:2019 is part of the ISO family for non‑destructive testing and should be used in conjunction with other NDT standards and national guidance documents. For terminological cross‑checks, reference the ISO Online Browsing Platform and the IEC Electropedia. Users seeking method procedures, calibration practices or performance requirements should consult applicable ISO/TC 135 standards and relevant national NDT codes.

For feedback or questions on the vocabulary, contact your national standards body or consult ISO's membership list and resources at www.iso.org.