HiVol Cascade Impactors

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Series 230-High Volume Cascade Impactors

Series 230 hivol cascade impactors attache to any high volume air sampler and fractionates suspended particulates into as many as six different size fractions.  The slotted impactor design separates particulates from larger than 7.2µm to less than .49µm while operating at a flow rate of 40cfm.  The cascade design of this impactor collects particles on small light weight substrates that are analyzed for respirable particulate matter.  There are several models available with 1, 4, 5, and 6 impactor stages allowing for ultimate flexibility.

How does it Work?

Suspended particulates enter through the hivol cascade impactor through the first set of parallel slots on the first stage. Particulates that are too large to travel to the next stage are impacted on the collection substrate and the smaller particles remain in the air stream and travel to the next stage.  The slots on each stage are the same width but as the particulates continue through, the slots become successively smaller and most of the particulates will eventually become impacted on one of the collection stages.  After the last stage the smallest particles will be collected on the backup filter which will be weighed for particle size distribution.

Particulate Size

Stage No. 40 CFM 20 CFM
1 7.2µm 10.2µm
2 3.0µm 4.2µm
3 1.5µm 2.1µm
4  0.95µm  1.4µm
5 0.49µm .73µm
6 ——— .41µm
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Aerodynamic sizing and distribution of ambient particulate with unprecedented precision…..cost….and ease of operation.

Available Models

TE-236-Six Stage Cascade Impactor

6 Stage cascade impactor
Description: 6 Stage High volume  Impactor
Flow Rate: 20cfm
Particle Size: 0.41 to 10.2µm
Use With: TSP and PM10 High Volume air samplers
System Includes Stages 1, 2, 3, 4, 5, 6,  Aluminum Base Plate, Screen Support, 8″ x 10″ Gaskets (2X)

TE-235-Five Stage Cascade Impactor

5 stage cascade impactor