 In 2004, the company's African unit acquired Stettyn, a manufacturer of center pivots based in Bloemfontein, South Africa.In June 2006, Lindsay acquired Barrier Systems Inc. which was founded in 1985 and developed the Quickchange Moveable Barrier (QMB) which helps control and manage traffic by adding lanes to a roadway during periods of heavy traffic and then removing the added lanes when the traffic influx is reversed.On January 25, 2008, the outstanding shares of stock of Watertronics, Inc, based in Hartland, Wisconsin, were purchased by Lindsay.