Channel Technologies Group (CTG) is a California-based company that designs and manufactures piezoelectric materials and transducers for military and commercial market customers. Based in Santa Barbara, Calif. and with a second manufacturing site in Bolingbrook, Ill., Channel Technologies Group (CTG) first began manufacturing piezoelectric ceramics in 1959. Since that time, CTG has grown, allowing CTG to expand its product offerings to include piezoelectric ceramics, piezoelectric single crystals, transducers, turnkey sonar systems and electro-optical calibration and testing equipment. Its products are used in a multitude of applications, and by a wide variety of end-users including medical device manufacturers, marine explorers and energy companies. CTG also services customers in the defe