The Leader in Power Measurement

Since its beginning in 1964, Ohio Semitronics has been a pioneer in the field of energy measurement. The founder of Ohio Semitronics, Dr. W.E. Bulman, pioneered the development of the hall-effect semiconductor materials that revolutionized current measurement devices. Over the last thirty-five years Ohio Semitronics has developed the widest array of energy measurement devices and instrumentation available from any manufacturer. Whether the application is AC, DC or somewhere in between, Ohio Semitronics has product to fit your needs.

In addition to our vast selection of standard products, Ohio Semitronics is known world wide for our custom, application specific product solution. OSI products can be found on submarines and destroyers, satellite delivery systems as well as military and commercial aircraft. OSI products can be found on oil platforms in the North Sea and at refineries in the desert. OSI products help control electric trains in Europe and wind mills in California. Manufacturing companies and electric utilities around the world rely on OSI products.  OSI Web Site