...which makes them great for long-term air quality studies but since my prayers have to go around to each device retrieve the filter media and take it back to the lab for analysis, is pretty useless for any acute airborne hazards.
Maybe the DoHS is trying to go around to various cities and establish a baseline for particulates, so that when there's a suspected attack, they can quickly tell what's normal and what's new.
The device seems like it's a lot more than a piece of filter paper and an air intake - surely there's much more going on in there than just particulate collection.
