Welcome - ECS, Inc. International Frequency Control, ECSpressCON, fast turn oscillators, quick turn oscillators, quartz crystals, oscillator, resonators, filters, TCXO/VCXO, TCXO, VCXO, RoHS Compliant, NetComponents, Digi-Key, Avnet, Future Electronics, Mouser ECS Inc. International is a privately held global leader in its class that is at the forefront in servicing a growing global demand for highly reliable innovative frequency control devices. ECS Inc. is recognized by world class research firms and electronic device designers as a top 15 worldwide developer and manufacturer of innovative frequency control solutions out of a global competitor count exceeding 600.