Nonrotate Impactor Info

Nonrotate Impactor Info


Nonrotate Impactor Info Airborne particulate matter affects each of us in numerous ways. Characterizing that particulate matter, in terms of its mass and/or chemical content, gives us insight into ambient air quality, atmospheric science, vehicle emissions, industrial emissions, and other areas.

Impactors have been manufactured by MSP and have been widely used for studying particulate matter in all of these applications and more. Collecting airborne particles in a size-segregated fashion, impactors allow researchers to learn more about the morphology and chemical composition of the particles we breathe.

To learn more about how non-rotating impactors may be useful for you, see the different options listed below:


Impactors are based on the principle that particles in an airstream will tend to continue in a straight line due to their inertia when the flow of air bends sharply; if a surface to which they can adhere is present, they will impact on it and may stick. In practice, a collection plate is placed in the flow of air, causing the gas flow to stream around the obstacle; particles, however, may strike the plate and stick. Obviously, the larger the particle, the greater its inertia and the greater the impaction on the plate.

The impaction efficiency (η) for particles depends directly on the particle diameter (D), the flow velocity of the air (V), and the particle density (ρ); it varies inversely with the gas viscosity (μ) and with a parameter (Db) that is representative of the impactor’s physical dimensions (e.g., the inlet nozzle diameter) and that is related to the curvature of the airstream.

Nonrotate Impactor Info

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