Editing Filter (section)

=== Device ===
* [[Filter (chemistry)]], a device which separates solids from fluids (liquids or gases) by adding a medium through which only the fluid can pass
** [[Filter (aquarium)]], critical components of both freshwater and marine aquaria
** [[Filter paper]], a semi-permeable paper barrier placed perpendicular to a liquid or air flow. It is used to separate fine solids from liquids or air
** [[Air filter]], a device composed of fibrous materials which removes solid particulates such as dust, pollen, mold, and bacteria from the air
** [[Oil filter]], a filter to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil
** [[Pneumatic filter]], a device which removes contaminants from a compressed air stream
** [[Water filter]], removes impurities from water by means of a fine physical barrier, a chemical process or a biological process
** [[Cigarette filter]], a part of a cigarette intended to filter the smoke inhaled by a smoker
** [[Coffee filter]], a utensil used to separate coffee grounds from liquid coffee
** [[Fuel filter]], found in most internal combustion engines
** [[Filtration (wine)]]
* [[Sieve]] or macroscopic filter, a device for separating wanted elements from unwanted material