3 ms·
In case anyone is interested, the fit test procedures are documented here: https://multimedia.3m.com/mws/media/252309O/3m-adflo-qualitative-fit-test-apparatus-f
by vngzs 5y ago
In case anyone is interested, the fit test procedures are documented here: https://multimedia.3m.com/mws/media/252309O/3m-adflo-qualitative-fit-test-apparatus-ft-10-ft-30.pdf https://multimedia.3m.com/mws/media/252309O/3m-adflo-qualita...
- tablespoon 5y agoIIRC, that's one of the two methods they use. The "qualitative" gives a binary result, but there are also "quantitative" methods that measure the the actual filtration efficiency with the fit. That qualitative test kit is probably the cheapest, but it still costs still hundreds of dollars. Though I imagine that's mainly due to low-volume production, since it doesn't seem that complicated.
- jerlam 5y agoThere are some options for doing fit tests with cheaper equipment. Here's one that uses a humidifier and essential oil diffuser and compares them with the official testing equipment: https://www.cambridge.org/core/journals/disaster-medicine-and-public-health-preparedness/article/performing-qualitative-mask-fit-testing-without-a-commercial-kit-fit-testing-which-can-be-performed-at-home-and-at-work/41EDE04D0885104F2ECBF5725047D7C8 https://www.cambridge.org/core/journals/disaster-medicine-an...