Particle Size Distribution of Aerosol (PAO-4) Generated from a Thermal Condensation Generator (TDA-5A, TDA-5B)

Thermal Condensation Aerosol Generator using PAO-4 (4 cSt polyalphaolefin)
Operating at standard set up parameters of 408° C (765° F) 50 psig inert gas supply.

	Number Particle Size	Surface Particle Size	Mass Particle Size	Volume Particle Size
Median (nm)	204	275	309	309
Mean (nm)	219	283	316	316
Geo. Mean (nm)	204	267	300	300
Mode (nm)	202	300	334	334
Geo. St. Dev.	1.46	1.42	1.39	1.39

*The aerosol distribution listed above is characteristic of the ambient conditions and instrument settings at the time of testing.  Particle size distributions generated during field usage will change depending upon the ambient temperature, humidity and instrument settings in use.