The Microorifice Uniform Deposit Impactor (MOUDI) is an in situ airborne or ground-based sampler developed by the MSP Corporation. It is an eight-stage impactor used for high-accuracy aerosol sampling for gravimetric or chemical analysis. MOUDI has a sample flow rate of 30 liters per minute and can sample particles in the size range of 0.056-18 µm. It is used for applications such as air pollution research, engine emission testing, and aerosol analysis.

Instrument Details
- Sampler
- Earth Science > Atmosphere > AerosolsEarth Science > Atmosphere > Aerosols > Aerosol Particle Properties
- Troposphere
- N/A
- Point
- N/A
- https://doi.org/10.1080/02786829108959504
Currently unavailable
Currently unavailable
MSP Corporation
Department of Energy, Electric Power Research Institute, U.S. Department of Interior's Mineral Institutes program
data center outside NASA
![]() DeHavilland DHC-6-300 Twin Otter 18 Campaigns · 70 Instruments | ![]() Cirrus Regional Study of Tropical Anvils and Cirrus Layers Florida Area Cirrus Experiment 2002 Southern Florida 1 Deployment · 1 Data Product
| ||||||||
![]() Campaign Field Sites Stationary 61 Campaigns · 163 Instruments | PAC2001 Pacific 2001 Air Quality Study 2001 Lower Fraser Valley, British Columbia, Canada 1 Deployment · 8 Data Products
![]() Atmospheric Emissions and Reactions Observed from Megacities to Marine Areas 2023 Urban regions across the western and eastern United States 1 Deployment · 0 Data Products
|