Accuenergy AEMC APM Technologies ATS Applied Technical Systems Bauser Canadian Shunt Industries Conax Technologies DEIF Dylix Eagle Signal Controls Fibox Fuji Electric General Electric / ITI Grant Instruments Hoyt Electrical Instrument Works Hsiang Cheng Electric Corporation ITECH Jewell Instruments Lightel Magtrol Marvin Test Solutions Monarch Instruments NEO Messtechnik Neureus Technologies Preen Rigol Technologies Inc. Sifam Tinsley Superior Electric Texmate Veeder-Root Veris VPC Weiss Technik Yokogawa