Porvair plc develops, designs and manufactures specialist filtration and separation equipment. It serves aviation, energy and industrial process, environmental laboratories and non-ferrous metals markets. It operates in two divisions. The Microfiltration division consists of the Porvair Filtration Group, Porvair Sciences and Seal Analytical (Seal). It also provides bespoke filtration solutions to a diverse range of customers and markets. It serves aviation, environmental laboratory and energy markets. The Metals Filtration division serves global aluminum, NAFTA iron foundry and super alloy markets. The Metals Filtration division serves the market for the filtration and handling of molten metal. On 5 December 2011, the Group acquired, through its subsidiary, Seal Analytical Limited, the Block Digestion product range from AIM Lab Automation Technologies Pty Limited. In March 2012, it acquired Pell Industries. In April 2012, it acquired the business and assets of Pulse Instrumentation.