Cole-Parmer's fume extractors provide localized ventilation at the contaminant source. Most fume extractors have extractor arms that can be easily positioned to remove fumes or air-borne particulates. These air cleaning systems capture and remove smoke, dust, mist, and fumes before they enter the work area, then recirculate clean air back into the workplace. Two-arm extractor units are Ideal for two-station setups. You can use an included inlet cap to convert to single-arm use. Single arm use will increase the air volume which will provide more exhaust power at a single station. Fume extractors are often used when the fume source can not be readily moved to a conventional hood or when fumes are innocuous, bad-smelling without being chemically dangerous. Cole-Parmer offers stationary, portable, bench top, and downdraft stations that are suitable for many applications, including welding and soldering stations, metal grinding, solvent mixing, and even painting. Fume extractors use high efficiency HEPA and carbon-activated filters that are replaceable to ensure only clean air is vented back into the surrounding environment.