Home/Technical Glossary/Fume Extractor Fume Extractor Many welding, soldering, and marking operations (laser marking plastics, for example) result in the production of fumes or smoke which may contain complex and dangerous molecular structures, and should be eliminated.  This is most often done using a filter or fume extraction system. Fume extractors may be portable, desktop, or industrial high efficiency as seen in a cleanroom or laboratory.