Sigma Electronics has completed nearly 9,000 different custom designs of transformers, inductors, chokes and other coil related products. Its engineering department is available to work with customers on new applications from designing, engineering and manufacturing through final testing. Sigma Electronics has designed and manufactured products for applications in automatic controls, computers, aerospace, marine electronics, biomedical equipment, geophysical instrumentation, military applications and oilfield services. The company provides full documentation for all prototypes through each stage of development. Additionally, Sigma Electronics designs and manufactures custom crafted magnetics for the aerospace, geophysical, biomedical, data processing industrial process control and military communications industries. The company was established in 1981 and is headquartered in Houston.