Porvair PLC is an environmental treatment control company. It develops filteration solutions to be used by various types of industries. It caters to its clients through three divisions, Aerospace & Industrial, Laboratory and Metal Melt Quality. Aerospace & Industrial Division designs and manufactures specialist filtration equipment for application in aerospace, energy, bioscience, water and industrial applications. Laboratory Division designs and manufactures instruments and consumables for use in environmental and bioscience laboratories. Metal Melt Quality Division designs and manufactures porous ceramic filters for the filtration of molten metals. The company generates most of its revenue from sales in the United States.