Since its beginning in 1964, Ohio Semitronics has been a pioneer in the field of energy measurement. The founder, W.E. Bulman, pioneered the development of the hall-effect semiconductor materials that revolutionized current measurement devices. The company has developed several types of energy measurement devices and instrumentation and offers custom application of products. Its products are used on submarines and destroyers, satellite delivery systems, military and commercial aircraft, oil platforms in the North Sea and at refineries. Ohio Semitronics products help control electric trains in Europe and wind mills in California. All its products are manufactured in the United States.