Advantage :
- Patented nozzle design (7th-10th Stage)
- All nozzles can be cleaned with an ultrasonic cleaner
- Can replace the existing nozzles of the MODUI with new patented nozzles
- Each jet-to plate distance of Impactor has been calibrated to obtain highly accurate data
- With Semi ¡V Automatic (1000M) and Fully Automatic (1000A) Series
- With CE mark
Applications :
- Environmental air sampling for air pollution and air quality
- Production testing in the factory
- Work place aerosol analysis
- Engine emission testing
- Automotive air bag testing
- Industrial hygiene studies
Features :
- It¡¦s relatively smaller interstage pressure drop as compared to low pressure impactors which reduces potential evaporation of volatile aerosol species.
- Nozzle plate can be cleaned using ultrasonic cleaner.
- The new nozzle plates in the lower stages of the NMCI outperform those of the MOUDI in preventing nozzle clogging.
Description :
These cascade impactors are designed for sampling and collecting size-fractionated aerosol particle samples for gravimetric and/or chemical analyses. That preferred by aerosol researchers worldwide for environmental and laboratory research.
New nozzle plates
The original 7th-10th stages in one of the MOUDI were replaced by the new nozzle plates with smooth nozzle shape fabricated by the LIGA process (Lithography, Electroplating, and Molding). The cascade impactor is hereafter referred to as the NMCI (NCTU micro-orifice cascade impactor). It is closer to a perfect round shape than the former. In the laboratory, the particle collection efficiency curves of the 7th-10th stages of the NMCI and those of the MOUDI were obtained to ensure Dpa50 values match with the nominal values given in Marple et al. (1991).
|
