Smiths Group Plc develops, manufactures and sells control systems and instrumentation for industrial applications. It delivers products and services for the threat and contraband detection, energy, medical devices, communications and engineered components markets worldwide. The company operates through five divisions: John Crane, Smiths Detection, Smiths Medical, Smiths Interconnect and Flex-Tek. The John Crane division offers mechanical seals, seal support systems, engineered bearings, power transmission couplings and specialist filtration systems. The Smiths Detection division provides sensors that detect and identify explosives, narcotics, weapons, chemical agents, biohazards and contraband. The Smiths Medical division offers medication delivery systems, vital care products and safety devices that prevent needlestick injuries and reduce cross-infection. The Smiths Interconnect division offers specialised electronic and radio frequency components and sub-systems that connect, protect and control critical systems. The Flex-Tek division offers engineered components that heat and move fluids and gases, flexible hosing and rigid tubing. The company was founded by Samuel Smith in 1851 and is headquartered in London, the United Kingdom.