Sigma Electronics, Inc. is a custom design transformer and wire-wound magnetic component manufacturing company based in Houston, Texas. Sigma is dedicated to providing high quality custom transformers, inductors, chokes, coils and related wire-wound magnetic components for original equipment manufacturers, with an emphasis on high pressure/high temperature 260C applications. Our experience and expertise makes us a leader in the design and manufacturing of extreme environment transformer and wire-wound magnetic components required in Oilfield Services downhole applications. Sigmas success is a result of experience, quality, and service that has been provided to our customers for more than 45 years.