Tan Delta Systems plc engages in the development, manufacture, and sale of oil sensors in the United Kingdom, Europe, North and South America, Asia, and the Middle East. The company offers oil quality sensors; kits, including mobile oil test, display, and gateway kits; accessories, such as gateways, display express, gateway hubs, manifolds, and cables; and oil profiling services. It serves the bioenergy, power generation, mining and mineral, commercial marine, manufacturing, agriculture, utilities, and transportation industries. Tan Delta Systems plc was incorporated in 2007 and is headquartered in Sheffield, the United Kingdom.