Continuous, Long Term Monitoring of Ultrafine Particles - Desert ...
Continuous, Long Term Monitoring of Ultrafine Particles - Desert ...
Continuous, Long Term Monitoring of Ultrafine Particles - Desert ...
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Total Number Concentration<br />
Condensation Technique Used to Count Ultra-Fine <strong>Particles</strong><br />
− Standard method used by government agencies (NIOSH, EPA, etc.) and air<br />
quality measurement experts to measure UFP concentrations.<br />
− Single particle counting: particles are counted individually, significantly<br />
increasing concentration accuracy.<br />
Particle<br />
Sample<br />
Saturate sample with water vapor<br />
Heat & Grow<br />
particles to a<br />
detectable t size<br />
Count each particle<br />
using light scatter<br />
Optics<br />
8<br />
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