Initially, a large piece of canvas was stretched between two wooden poles held up by guy wires, with a long trough underneath was used as a mist collector. In this process, the water would condense out of the fog onto the canvas and then would drip and slip into trough kept below as a mist collector. The major technologies of this air pollution control equipment is electrostatic, media and centrifugal. The cheap and durable qualities of electrostatic mist collector makes it useful in machining applications. The technology of an oil mist collector works by bringing the dirty air in through an impinger which removes maximum amounts of the mist, particularly the larger droplet. Then the air is drawn through an ionizing section, which charges the particles of remaining mist in the air, which then passes through the electronic cell which carries an opposite charge. The charged mist particles are next attracted to the electronic cells where they accumulate and drip back down to be recaptured or drained away. The smallest size of this cleaning equipment is referred to as machine mount.
