Bob, I've got my AQI meter coded and as this is going to be for a wood working environment, although I can set the range to anything in the settings menu, I'm wondering if it might be advantageous from a wood working point of view to have two AQ! indicators, one for PM2.5 and one for PM10, or just do a calculation to combine them into one AQI?
BTW the big Graphic gauges look really nice on screen.