MICRO-ORIFICE
UNIFORM DEPOSIT IMPACTORS (MOUDI™)
- Model 100 &
110 MOUDI™
- Model 115
Nano-MOUDI™
| These
precision, high-performance cascade impactors provide high sampling flow rate, low
inter-stage wall loss, and sharp cut-point characteristics (see figure on right). They are
available as an 8-stage (Model 100) or a 10-stage (Model 110) impactor, in a rotating or a
non-rotating form (see photos above). The Model 100 provides cut-point diameters of 18,
10, 5.6, 3.2, 1.8, 1.0, 0.56, 0.32, 0.18 µm. Additional cut-points at 0.1 and 0.056 µm
are provided with the Model 110. The Model 115 Nano-MOUDI has cut-points in the nanometer
range: 32, 18 and 10 nm. |
|
MOUDI™
Cut-Point Characteristics
|
The non-rotating version of each impactor
operates as a conventional impactor. In the rotating version, the nozzle and impaction
plates rotate relative to each other to form a near-uniform particle deposit on each
substrate over a 25-mm diameter impaction area. Nozzle rotation spreads out the particle
deposit under each nozzle, thereby reducing the deposited particle mass per unit collector
area by a factor up to 1000. More particle mass can thus be collected without overloading
the substrate. A large number (up to 2000) of very small nozzles (down to 50 µm in nozzle
diameter) are used to reduce the impaction velocity and particle bounce. The pressure drop
is also lower, thus minimizing evaporative loss of semi-volatile particles during
sampling.
FEATURES & APPLICATIONS
- Precision size classification of
aerosols for
- air pollution
- pharmaceutical aerosol drug
delivery
- diesel blowby and engine
emission testing
- automotive airbag testing
- industrial hygiene studies
- Sharp cut-point characteristics
- Four equal geometrical intervals per decade
of particle size
- Models 100 and 110
- 30-L/min sampling flow rate
- 8 and 10 impactor stages + after
filter
- 0.18-µm and 0.056-µm minimum
cut-point
- Model 115
- 10-L/min sampling flow rate
- 3 impactor stages + after filter
- 10 nm minimum cut-point
SPECIFICATIONS (Subject to
change without notice)
|
Model 100 with rotator |
Model 100 w/o rotator |
Model 110 with rotator |
Model 110 w/o rotator |
Model 115 w/o rotator* |
| Impactor stages |
8 |
8 |
10 |
10 |
3 |
| Flow rate, L/min |
30 |
30 |
30 |
30 |
10 |
| D50 Diameter, µm |
0.18 to 18 |
0.18 to 18 |
0.056 to 18 |
0.056 to 18 |
0.010 to 0.032 |
| (D x H) |
220 x 500 mm |
80 x 360 mm |
220 x 560 mm |
80 x 420 mm |
80 x 190 mm |
| Weight |
11 kg (24 lb) |
2 kg (4.4 lb) |
12 kg (26lb) |
2.3 kg (5.1 lb) |
1.8 kg (4 lb) |
| Power |
115 VAC, 60 Hz, 0.3 A |
|
115 VAC, 60 Hz, 0.3 A |
|
|
| Optional |
230 VAC, 50 Hz, 0.2 A |
|
230 VAC, 50 Hz, 0.2 A |
|
|
|
*Model 115, 3-stage Nano-MOUDI™ is
available in a non-rotating version only. It requires a separate 6 cubic meter/hr vacuum
pump down stream of the Model 110 MOUDI™ to sample aerosol to 10 nm.
PDF on Models 100 & 110 MOUDI™
If
you do not have acrobat reader, please click here  |
