Profile: National Control Devices, LLC is a manufacturer of computer controlled switching devices. Our product line includes internet relay control, relay controllers, powered & wireless relays, sensors, solid state, ethernet, blue-tooth and fiber optic relays. Our Taralist series time activated relays have an integrated battery backed real time clock with memory that allows users to control relays based on a time schedule. Our reactor relay series controllers are capable of making its own intelligent decisions based on user input.