Air pollution is a major problem, a problem that occurs in urban areas. Especially Bangkok. Because air pollution cause health effects. Whether the odor nuisance.And cardiopulmonary system. Thus monitored pollution in the atmosphere is one of the most important missions. PCD is governed by the air quality monitoring on a continuous basis.Including small dust. (Particle size less than 10 microns.pm-10) sulfur dioxide (so2), lead (pb), carbon monoxide (co) nitrogen oxide (nox) and ozone (o3).