Standards
ISO 11140-1
ISO 11140-1 — International standard that sets general requirements for chemical indicators and sorts them into six classes by what they respond to.
The six classes are 1 (process), 2 (specific test), 3 (single variable), 4 (multi-variable), 5 (integrating) and 6 (emulating). Other parts of the series cover specific tests, such as ISO 11140-4 for Bowie-Dick alternative test packs.
A product’s class should be printed on the indicator or its packaging along with the process and stated values it is designed for.
Related termsChemical indicatorProcess indicator (Class 1)Multi-variable indicator (Class 4)Integrating indicator (Class 5)Emulating indicator (Class 6)
Questions about ISO 11140-1?The ProDr desk answers technical and documentation questions within one business day.
WhatsApp the desk
All terms