Published
This part of ISO 17420 is applicable to an unassisted filtering device and specifies a standard thread connection between a filter and the respiratory interface as required in ISO 17420-2.
This part of ISO 17420 also includes the description of test simulators that are necessary for the assessment of some of the requirements.
PUBLISHED
ISO 17420-3:2012
90.92
Standard to be revised
Dec 2, 2025
PROJECT
ISO/CD 17420-3