Impingement filters primarily capture particles based on their:

Impingement filters primarily capture particles based on their weight and speed. This type of filtration mechanism relies on the principle of inertia. As air or fluid moves through the filter, particles that are heavier and moving at certain speeds tend to have difficulty changing direction due to their inertia. When they encounter the fibers or surfaces of the filter medium, their momentum causes them to collide with these surfaces, leading to their capture.

In this filtration process, heavier particles are more effectively captured because they are less likely to follow the airflow's streamlined path. Instead, their weight and velocity result in them veering off course and making contact with the filter material. This mechanism is specifically designed to exploit the physics of particle movement, making it particularly effective for certain types of particles in various applications.

Other factors such as electric charge or shape and size can influence particle behavior in different filtration contexts, but in the case of impingement filters, the principle of weight and speed is fundamental to their effectiveness. The focus on these physical attributes helps ensure effective filtering in many air quality and HVAC applications.