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C h a p t e r 1
Product Overview
The Model 3750 Condensation Particle Counter is a compact, rugged, and
full-featured instrument that detects airborne particles down to 7
nanometers in diameter at an aerosol flow rate of 1.0 liter per minute, over
a concentration range from 0 to 10
5
#/cm3. These CPCs are ideally suited
for applications such as basic aerosol research, filter and air-cleaner
testing, particle counter calibration, environmental monitoring, mobile
aerosol studies, particle shedding and component testing, and atmospheric
and climate studies. The Model 3750 CPC is also compatible with TSI
Scanning Mobility Particle Sizer™ (SMPS™) spectrometers for particle
size distribution measurements.
In this CPC, an aerosol sample is drawn continuously through a heated
saturator in which butanol is vaporized and diffuses into the sample
stream. Together, the aerosol sample and butanol vapor pass into a cooled
condenser where the butanol vapor becomes supersaturated and ready to
condense. Particles present in the sample stream serve as condensation
nuclei. Once condensation begins, particles that are larger than a threshold
diameter quickly grow into larger droplets and pass through an optical
detector where they are counted easily.
Figure 1-1
Model 3750 Condensation Particle Counter
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