Invensys Limited, a technology company, provides software products, systems, and control equipment to various industries worldwide. Its Software segment develops and supplies industrial software products, including SimSci-Esscor, a design, simulation, and optimization software, as well as a trading, planning, and scheduling software; Wonderware Avantis, an operations and asset management software; and Wonderware, a visualization and supervisory control software for real-time production management. The company’s Industrial Automation segment manufactures and supplies Triconex emergency shutdown systems; and Foxboro distributed control systems, as well as various field devices, and pressure, flow, and analytical measurement and instrumentation products. Its Energy Controls segment offers a range of high-precision controllers and recorders under the Eurotherm brand for industrial applications; and designs and supplies a range of controls under the Eliwell and Ranco names for use in refrigeration, heating, ventilation, and air-conditioning. This segment also provides heating controls, such as thermostats, time controls, thermostatic radiator valves, and under-floor heating controls under the Drayton, Eberle, and Robertshaw brands primarily for use in homes; and monitoring controls under the IMServ Centeron name. Invensys plc primarily serves oil refineries, power stations, mining companies, original equipment manufacturers, and large project installers. Invensys Limited was formerly known as BTR Siebe plc and changed its name to Invensys Limited in April 1999. The company was incorporated in 1920 and is based in London, the United Kingdom. As of January 17, 2014, Invensys Limited operates as a subsidiary of Samos Acquisition Company Limited.