Cascade impactors, nano-MOUDI, MOUDI impactor

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Applied Physics, Inc.

Applied Physics, Inc. supports

MSP Corporation Products

M120 Nano-MOUDI, M122 Impactor & M125 Cascade Impactor

MSP Corp. MOUDI-II cascade impactor, and Nano-MOUDI, Nano MOUDI II, Cascade Impactor- Request a Quote

10 and 13 stage Micro Orifice Uniform Deposit Impactors, MOUDI Impactors with internal stepper motor and stage rotation to provide uniform particle deposits and high accuracy aerosol sampling from 10nm to 10,000nm for collecting size fractionated particle samples for gravimetric and/or chemical analyses. Both rotating cascade impactors and non-rotating cascade impactors are provided.

nano moudi impactor nano-moudi impactor moudi impactor
case closed case open

Model 120-R Nano-MOUDI, Model 125-R Nano-MOUDI and Model 122-NR Cascade Impactor

nano moudi impactor, cut points

CASCADE IMPACTOR, DISCUSSION

MOUDI-II and Nano-MOUDI II cascade impactors are second generation MOUDI impactors and NanoMOUDI impactors. Both series of impactors are precise, high accuracy devices designed for sampling and size-fractionation of airborne particles for gravimetric and/or chemical analysis, as well as SMOG particle sampling, Diesel particle sampling and aerosol partical sampling. The primary difference is the use of internal embedded stepper motors to rotate the impaction plates by the second generation MOUDI-II impactors and the use of external mechanical gear rotation in the original MOUDI cascade impactor, which is offered as an 8 stage or 10 stage cascade impactor.

Both series of MOUDI Impactor and Nano MOUDI impactors are referred to as Micro-Orifice Uniform Deposit Impactors, since they use micro-orifice nozzles for jet acceleration, and are available with the uniform deposit feature by rotating the impaction plates with respect to the nozzles to spread out the particle deposit uniformly on the collection substrates. The uniform deposit prevents heavy particle build-up under each nozzle to reduce particle bounce and blow-off that may otherwise occur. The micro-orifice nozzles used in these impactors reduce the jet velocity, pressure drop, particle bounce, and evaporative loss.

The original MOUDI cascade impactors are noted for their superior aerodynamic design, sharp cut-size characteristics and low inter-stage particle losses. These features, together with their accurate cut-size calibration, have made the MOUDI impactor, the cascade impactor of choice for high quality environmental research. The same characteristics are retained in the MOUDI-II impactors.

PRODUCT HIGHLIGHTS

Model 120-R MOUDI-II is a 10 stage, 30 L/min impactor with internal embedded stepper motors for the rotation of the impaction plates. This cascade impactor is a second generation MOUDI Model 110-Rotating impactor.

Models 122-R & 122-NR NanoMOUDI-II cascade impactors are 13 stage, 30 L/min impactors. The Model 122-R has internal embedded stepper motors for the rotation of the impaction plates, while Model 122-NR is a non-rotating cascade impactor with stationary impaction plates.

Models 125-R & 125-NR Nano MOUDI-II impactors are 13 stage 10 L/min impactors. The Model 125-R has internal embedded stepper motors for impaction plate rotation, while Model 125-NR Non MOUDI has stationary, non-rotating impaction plates. Models 120-R, 122-R and 125-R have electronic control for stage rotation, and built-in sensors that continuously monitor the ambient temperature and pressure during sampling. Absolute pressure sensors monitor the pressure in the micro-orifice stages and the stability of flow. Should the micro orifice nozzles of a stage become partially clogged during sampling, change in stage pressure drop will be quickly noted. Built-in electronics oversees the entire instrument operation and records environmental and pressure data generated for post sampling review.

FEATURES

  • Sampling flow rate:
    - Models 120-R, 122-R, & 122-NR: 30 L/min
    - Models 125-R & 125-NR: 10 L/min
  • Size intervals and stage cut-sizes
    - four equal geometrical increments per decade of particle size
    - Model 120-R: 0.056, 0.1, 0.18, 0.32, 0.56, 1.0, 1.8, 3.2, 5.6 and 10 m
    - Models 122-R & 122-NR: 0.01, 0.018, 0.032, 0.056, 0.1, 0.18, 0.32, 0.56, 1.0, 1.8, 3.2, 5.6, 10 and 18 m
    - Models 125-R & 125-NR: 0.01, 0.018, 0.032, 0.056, 0.1, 0.18, 0.32, 0.56, 1.0, 1.8, 3.2, 5.6 and 10 m
  • Easily removable collection substrates allow for rapid run turn-around times for high productivity
  • Models 120-R, 122-R, & 125-R NANO MOUDI:
    - Volumetric flow control
    - Programmable logic controller (PLC) controls instrument operation including start- and stop times.
    - Temperature and pressures are measured and stored at pre-determined time intervals.
    - Absolute pressures are monitored on the lower stages to provide indication for possible clogging of nozzles as small as 50 m in diameter
  • Sharp cut-off characteristics
  • Low inter-stage losses
  • Up to 6000 micro-orifice nozzles to reduce jet velocity and pressure drop

APPLICATIONS

  • Sampling of atmospheric aerosol particles for research and environmental monitoring
  • Work place aerosol analysis
  • Diesel particle emission analysis and monitoring
  • SMOG monitoring
  • Industrial hygiene studies

DESCRIPTION

The rotating versions of the MOUDI-II impactor and NanoMOUDI-II impactor are 2nd generation MOUDI and NanoMOUDI cascade impactors using individual stepper motors embedded in each stage to rotate the collecting substrate for uniform deposition. Power for the stepper motors comes from a single electronic package in the instrument cabinet, with power being distributed to each motor by miniature flat-ribbon cables from stage to stage. Figure 1 below shows a typical rotating stage and Figure 2 shows an impactor stage with a uniform particle deposition on the substrate, provided by a rotating Model 122 rotating, cascade impactor.

NanoMOUDI Cascade Impactor Typical Stepper Motor Operated Impaction Stage NanoMOUDI Cascade Impactor Typical Rotating Stage with Uniform Deposit in Center
Figure 1: Typical Stepper Motor Operated Impaction Stage Figure 2: Typical Rotating Stage with Uniform Deposit in Center

All MOUDI-II and NanoMOUDI-II impactors have the same aerodynamic nozzle designs as the original MOUDI impactors with sharp cut characteristics (see Figure 3) and low inter-stage wall losses. The available impactor cut sizes are: 0.010, 0.018, 0.032, 0.056, 0.10, 0.18, 0.32, 0.56, 1.0, 1.8, 3.2, 5.6, 10 & 18µm.

Because the motors in the MOUDI-II and NanoMOUDI-II cascade impactors are internal at each stage, each stage can be operated independent of the others and can be added or removed to suit the individual measurement needs. However, removing a high pressure-drop stage from the cascade impactor can cause the absolute pressure and the cut-size characteristics to change for down-stream micro-orifice impaction stages. For this reason, only the upper stages with cut-size ≥ 0.56µm should be considered for removal where necessary.

Nano-MOUDI, Cascade Impactor Stage Efficiency Curves
Figure 3: Stage Efficiency Curves

The Models 120-R, 122-R & 125-R are provided with instrument cabinets that also house the electronics for controlling the volumetric flow, monitoring and recording the output of the six pressure transducers for absolute pressure monitoring at the more critical micro-orifice stages. The absolute pressure indicates possible flow instability due to nozzle clogging or leaks in the system. These features insure the absolute data quality generated by the collected particle samples. For applications that do not require stage rotation, Models 122-NR and 125-NR can be ordered with mechanical gages.

MSP Corp. SPECIFICATIONS (subject to change without notice)

 

Model 120-R (with internal rotation)

Model 122-R (with internal rotation)

Model 122-NR (w/o rotation)

Model 125-R (with internal rotation)

Model 125-NR (w/o rotation

Impactor Stages

10 stages

13 stages

13 stages

13 stages

13 stages

Flow rate, L/min

30LPM

30LPM

30LPM

10LPM

10LPM

Cut-point diameter

56nm, .1um, .18um, .32um, .56um, 1um, 1.8um, 3.2um, 5.6um 10um, 18um filter

10nm, 18nm, 32nm, 56nm, .1um, .18um, .32um, .56um, 1um, 1.8um, 3.2um, 5.6um 10um, 18um filter

10nm, 18nm, 32nm, 56nm, .1um, .18um, .32um, .56um, 1um, 1.8um, 3.2um, 5.6um 10um, 18um filter

10nm, 18nm, 32nm, 56nm, .1um, .18um, .32um, .56um, 1um, 1.8um, 3.2um, 5.6um 10um, 18um filter

10nm, 18nm, 32nm, 56nm, .1um, .18um, .32um, .56um, 1um, 1.8um, 3.2um, 5.6um 10um, 18um filter

Dimensions (DxH)

220 x 500mm

80 x 360mm

220 x 560mm

80 x 420mm

80 x 190mm

Weight

11 Kg (24lb)

2 Kg (4.4 lb)

12 Kg (26 lb)

2.3 Kg (5.1 lb)

1.6 kg (3.6 lb)

Power (standard)

115 VAC, 60 Hz,.3 A

115 VAC, 60 Hz, 15 A

115 VAC, 60 Hz, 15 A

115 VAC, 60 Hz, 7 A

115 VAC, 60 Hz, 7 A

Power (optional)

230 VAC, 50 Hz, .2 A

230 VAC, 50 Hz, 8 A

230 VAC, 50 Hz, 8 A

230 VAC, 50 Hz, 4 A

230 VAC, 50 Hz, 4 A

Optional Pump

GAST Model 0823 Series

Leybold Model SV-40

Leybold Model SV-40

Leybold Model SV-16

Leybold Model SV-16

Pump Power

115 VAC, 50-60 Hz, 0.56 kW (standard); 230 VAC, 50-60Hz, 0.56 kW (Optional)

1.5Kw

1.5Kw

0.75Kw

0.75Kw