MOUDI-II Impactors 120R, 125R

Model Number: 120R

MOUDI-II and NanoMOUDI-II impactors are second generation Micro-Orifice Uniform-Deposit Impactors (MOUDI™) from MSP™, a Division of TSI®. These impactors are noted for their superior aerodynamic design, sharp cut-size, and low particle loss characteristics. Thousands of precision micro-orifice nozzles are used to reduce pressure drop, jet velocity, particle bounce, and re-entrainment. 

Product Details

Individual stepper motors in the Moudi-II impactors provide reliable long-term, internal impaction plate rotation to spread out the particles so they collect in a nearly uniform deposit (ideal for some types of chemical analysis). Sampling flow rates are 30 L/min for the model 120R, and 10 L/min for the model 125R. These impactors are designed to collect size-fractionated particle samples in four equal geometrical intervals per decade of particle size for mass or chemical analyses. The nominal cut-size diameters for these impactors start at 10 µm and end at 56 nm for the 120R, and at 10 nm for the 125R (see table below).

Model Stages Nominal Cut Points (µm)* Pressure Drop (kPa) Flow Rate (L/min)
120R 10 10, 5.6, 3.2, 1.8, 1.0, 0.56, 0.32, 0.18, 0.10, and 0.056 40 30
125R 13 10, 5.6, 3.2, 1.8, 1.0, 0.56, 0.32, 0.18, 0.10, 0.056, 0.032, 0.018 and 0.010 90 10

*Inlet cuts at 18 µm.

 

Applications

  • Sampling of atmospheric aerosols for research and environmental monitoring
  • Workplace aerosol analysis
  • Engine emissions analysis and monitoring
  • Brakewear analysis and monitoring
  • Exposure monitoring
  • Industrial hygiene studies
  • Tobacco smoke and e-cigarette characterization
  • Biological aerosol characterization 

Features and Benefits

  • 30 L/min or 10 L/min sampling flow rate
  • Sharp cut-off size characteristics
  • Reliable internal impaction plate rotation provides nearly uniform particle deposits for better quantitative chemical analysis
  • Micro-orifice nozzle plates designed for low flow resistance and reduced particle bounce and re-entrainment
  • Up to 13 impactor stages with nominal cut points between 10 nm and 10 µm, plus a final filter
  • Low inter-stage losses
  • Easily removable collection substrates allow for quick turn-around time for productive use of the instrument
  • Programmable logic controller (PLC) controls instrument operation including start and stop times
  • Instrument temperature and pressures are measured, recorded, and stored at pre-determined time intervals
  • Pump control (ON/OFF)
  • Remote operation capability via Ethernet
  • Made of hard coated anodized aluminum for light weight, durability and nozzle dimensional stability