The oil captures particles from the blade.
Projects at the station include measuring ozone in the atmosphere and capturing subatomic particles, neutrinos from space.
The filter is designed to capture airborne particles like dust or bacteria.
Outside the tracker is a dense absorber to capture particles and measure their energies.
This is in contrast to other media, like diatomaceous earth, that use only the surface of the medium to capture particles.
Meltblown is often used as filter media, being able to capture very fine particles.
These captured particles are then carried out of the reactor with the fluid, where they must be separated.
Magnetic filters use a permanent magnet or an electromagnet to capture ferromagnetic particles.
Many monitors in wide use now are volumetric devices, which capture particles suspended in the air.
In particular, tight shutters are used to capture particles flying through the air, such as dirt from an exploding mortar.