The Model 3990-03 is a portable compact aerosol generator, which an on-hoard air compressor supplies the necessary pressure for producing a poly-disperse oil aerosol/ No other attaching air source requested. When it’s total output at 23psi (158kPa) and as under this Max. pressure is diluted by 50~2000cfm(85~3396m3/h) of air, the aerosol concentration will bw approximately 10~100μg/L for available generating.