Particle Number Measurement

SEMTECH^® CPN

The SEMTECH^® CPN continuously measures condensation particle number in real-time, in a package designed for on-board measurements. The system can operate continuously for extended periods without maintenance. A heated line delivers the sample to a catalytic volatile particle remover, dilutes the aerosol, and counts the particles by butanol condensation. This module operates as a stand-alone device and is compatible with the SEMTECH^® LDV and the SEMTECH^® ECOSTAR.

The CPN sample is diluted under hot conditions prior to entering a catalytic volatile particle remover (VPR), so as to strip the volatile components from the exhaust sample. The resulting aerosol is again diluted prior to entering the measurement chamber. The mixing type condensation particle counter is then used to count the particles by butanol condensation.

Internal view of CPC

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