Posebni ekstraktor plina je naprava, ki podobno kot separator plina, vendar v manj zahtevnih obratovalnih okoliščinah zvezno ločuje zrak in pline od tekočine ter samodejno ustavi pretok tekočine, če obstaja nevarnost, da bi zrak ali plini, ki so se nabrali v obliki žepov in so samo rahlo pomešani s tekočino, vstopili v pretočno merilo.
A special gas extractor is an apparatus which, like the gas separator but under less stringent operating conditions, continuously separates any air or gases contained in the liquid, and automatically stops the flow of liquid if there is a risk of air or gases accumulated in the form of pockets no more than slightly mixed with the liquid, entering the meter.