These units are particularly useful for the control of hot dusts from metal grinding, polishing, linishing, fettling and cast iron dressing. Other applications include leather and rubber grinding and trimming, spraying pottery glazes plus wide belt grinding and sanding machines. Wet collectors have proved successful on damp and sticky dust applications and are mandatory when working with explosive dusts such as aluminium, titanium and magnesium.

These units operate by drawing dust-laden air through a powerful water spray. Water in a tank is whipped up into a spray by a fan in the top of the unit. Dust is drawn through this atomised zone which captures the wetted particles producing a sludge which sinks to the bottom of the tank. This can be easily removed by periodically raking out or collected in a hopper.