Hi to all ! i would use arduino to measure the air quality for dust and gases.
for the dust i've found this two candidates, that measure from 1um to above. the price is quite the same.. but which of the two is better ?
http://www.seeedstudio.com/depot/Smart-Dust-Sensor-SMPWM01A-p-2085.html?cPath=25_27
then, for the gases i've found some sensors for toluene, benzene, and formaldeide from seedsstudio, but there are other alternatives.. have you something to advice me ?
thanks !! 