A demister or mist eliminator is an entrainment separator used for efficient entrainment of liquids or mist removal in any Liquid - Gas / Vapour processing operation. It is a tailor-made product specially designed and manufactured out of knitted wires. When properly applied, it can achieve 99.97% separation of entrapped liquid in a vapour stream.

Demisters are utilised in petroleum refining, petrochemical industry, gas chemistry, synthetic chemistry, salt and sugar manufacturing and other chemical industries. They are also employed in packed towers, dust arrestors and air filters in various enterprises, or for chemical-reaction acceleration by painting the filament surfaces with catalyst (in both separation and reaction). Other applications include the special gasket in cabinets of electronics instruments and vibration and sound insulation.