Fit Test the Furnaces - a pair of OpenCPC model 100.1’s monitor the submicron range of indoor air.

New respirator specimens! Specimen id is unique to each respirator in the box and can tie back to lot number, revision number and filtration info. Three specimens are sent per box. To further reduce bias - either none are tested or all 3 are tested. 50 complimentary probes and nuts. cpcCrashCrew!

Thank you to @astrokatie.com for lending your condensing particle counter for @ericbkennedy.bsky.social ‘s community survey!

Amazingly methodical contributors.

What CPCcrashcrew welcome baskets look like right now

Sending out standard samples to CPCcrashCrew

Bird’s eye view. Wide IQR means either bimodal or needs more samples.

Adversarial Mask Data Central docs.google.com/spreadsheets...

Fun things to do with a CPC

Idea: to mail volunteer testers samples with unique identifiers to streamline the crash testing process, and a sheet with all the results so far in a histogram.

Depends on the respirator, not the sip valve. I haven’t seen sip valves contribute to total inward leakage.