Overview
EN ISO 24584:2022 - Textiles - Smart textiles - Test method for sheet resistance of conductive textiles using non-contact type (ISO 24584:2022) - specifies a non-destructive, non-contact eddy current test method (reflection mode) to determine the sheet resistance of conductive textile structures. It is applicable to conductive sheets (woven, knitted, nonwoven, coated fabrics) and multilayer assemblies containing conductive and insulating layers. The standard was prepared by ISO/TC 38 in collaboration with CEN and is published as EN ISO 24584:2022.
Key topics and requirements
- Scope and applicability
- Measurement of sheet resistance for conductive textile materials and conductive layers intended for textile use.
- Applies to single- and multi-layer sheet formats.
- Measurement principle
- Uses eddy current technology in reflection mode: an alternating electromagnetic field induces eddy currents; the instrument measures the secondary field and derives sheet resistance without electrical contact.
- Apparatus and components
- Eddy current instrument and sensor probe, measurement stage, pressure plate (for alternative method), calibration device/software and timing equipment.
- Specimen preparation and sampling
- Guidance on cutting patterns, conditioning (see ISO 139 referenced), and preparing representative specimens for repeatable results.
- Calibration and test procedures
- Calibration procedure to relate eddy current signals to sheet resistance.
- Two procedural variants:
- Method A - standard non-contact measurement.
- Method B - measurement with applied pressure via a pressure plate (for specific sample types).
- Measurement points and reporting
- Defined measurement point patterns, data recording and required elements in a test report for traceability and quality control.
Applications and who should use this standard
EN ISO 24584:2022 is practical for:
- Textile manufacturers and converters producing conductive fabrics and coated textiles.
- Smart textiles and wearable electronics designers needing quantitative sheet resistance for circuit design, sensor integration, or EMC/EMI shielding.
- Quality control and R&D laboratories performing sheet resistance measurement, process control, and acceptance testing.
- Test houses, certification bodies and standards committees involved in smart textile evaluation.
Benefits include non-destructive, repeatable measurements and suitability for delicate or multilayer textile assemblies where contact methods are impractical.
Related standards
- ISO 139 - Standard atmospheres for conditioning and testing (referenced).
- ISO 12718, ISO 15549 - guidance on eddy current probes and testing variants (industry probe types).
- IEC 63203-101-1 - terminology related to conductive textiles (referenced in definitions).
Keywords: EN ISO 24584:2022, sheet resistance, conductive textiles, eddy current, non-contact measurement, smart textiles, conductive fabric, test method, reflection mode, quality control.