Part of Nitto Global Membrane Division and one of the global leaders in the production of high- and low-pressure membranes for municipal and industrial water treatment applications. Most active in small-to-medium scale plants. In 2003, Hydranautics acquired Kalsep Ltd., a water purification company. More recently, in 2020, Hydranautics secured a partnership with NX Filtration N.V. to distribute hollow fibre ultrafiltration products.