The cascade impactor is used for aerosol collection and size grading, it can collect nanoparticles (<100 nm) with uniform deposition characteristics. Thus, the microporous uniform deposition impactor (MOUDI TM) is developing.  These precision cascade impactors are used to sample and collect the size graded samples for weight analysis and / or chemical analysis. Several models in the MOUDI ™ product line have a maximum flow rate of up to 30 L / min and a minimum cut size of 10 nm. The MOUDI differs from other conventional cascade impacts.  It uses a large number of micro-orifice nozzles to reduce injection speed and pressure drop, minimize particle bounce and re-entrain, and increase collection efficiency using up to 6,000 nozzles with diameter small to 50μm. Some models have a uniform deposition feature by rotating the nozzle-related impact plate so that the deposition of particles beneath the nozzle can be evenly distributed throughout the impact area.

The M135 Miniature MOUDI ™ Impactor is a precision high-precision impactor with a sample flow rate of 2.0L / min and a small size of 6, 8, 10 and 13 stages. The minimum particle size is 10nm. M135 6-stage and 8-stage impactors are used for personal selection, can replace the Marple Personal II impactor in the market.

M100 is precision cascade impactors with sharp cut-size and low internal-loss characteristics. The M100 has 8 impaction stages and cut-size diameters from 0.18 µm to 18 µm. M100-NR is the object rotation type, M100-R is the rotary type. Impact stage rotation allows particle deposit on the impaction plate to spread out over a circular area to form a nearly uniform layer. 
1. 30 L/min sampling flow rate.
2. 37mm or 47mm collecting substrates.
3. Micro-orifice nozzles to minimize pressure drop, particle bounce, and re-entrainment.
 
M100-NR object rotary type 30L/min                                           M100-R rotary type 30L/min
10-stage rotary type MOUDI impactor 0.056-10μm

M110-R has 10 impaction stages and cut-size diameters from 0.056 µm to 10µm. M110-R is the object rotation type, M100-R is the rotary type. Impact stage rotation allows particle deposit on the impaction plate to spread out over a circular area to form a nearly uniform layer. 

3. Micro-orifice nozzles to minimize pressure drop, particle bounce, and re-entrainment.
The M120 sample flow rate is 30L / Min. The impactor is designed to collect size-stage particle samples at four equal geometrical intervals of ten times the particle size for mass or chemical analysis. The cutting diameters are: 10, 18, 32, 56, 100, 180, 320, 560, 1000, 1800, 3200.

Sampling flow rates are 30 L/min for the 122 and 10 L/min for the 125. The impactors are designed to collect size-fractionated particle samples in 4 equal geometrical intervals per decade of particle size for mass or chemical analyses. The cut-size diameters are: 10, 18, 32, 56, 100, 180, 320, 560, 1000, 1800, 3200, 5600, and 10000 nm.

High-Flow Impactor

M128, 129, 130, 131 are HIGH FLOW IMPACTORS (HFI™) with a sampling flow rate of 100 L/min. They are available with 3, 4, 5, and 6 impaction stages plus a final filter. Their high sampling flow rate makes them ideal for sampling particles at low concentrations or for obtaining samples in a short sampling time.

These 100-L/min impactors are high-flow-rate, low-pressure-drop cascade impactors intended for general-purpose aerosol sampling. These impactors are specifically suited for sampling applications where a large volume of air needs to be sampled with low power consumption such as in aircraft sampling. These impactors are good tools for ground-based applications such as atmospheric, industrial or health-related air sampling applications, where a larger sampling flow allows the user to collect more aerosol sample mass in less time.