Not quite there yet but getting close to a commercial product.
Same sensor I'm using (PMS7003)
Single number display of PM2.5 concentration. Wood workers really need the full 10 micron range concentration.
2017 Mini LED LCD Plantower PMS7003 G7 laser PM2.5 detector meter with battery | eBay
I don't believe the +/-1 ppb accuracy but if you have a spare $90 it might be useful thing to have?
If you buy one remember you cannot shove this up close to a stream of sawdust or down inside a DC duct to see how much dust there in there or you will kill it.
It's meant to be placed in a quiet corner or on a shelf , and you monitor things from there.