Founded in 1964 by Dr. Warren E. Bulman, Ohio Semitronics, Inc. has been repeatedly recognized as leaders in the field of industrial electrical and energy measurement. Dr. Bulman pioneered the development of hall-effect semiconductor materials that revolutionized current measurement devices. For the last 40 years, Ohio Semitronics, Inc. has developed and manufactured the widest array of electrical and energy measurement devices available from any single supplier.

In addition to their catalog products, Ohio Semitronics, Inc. consistently designs and delivers innovative, customer specific solutions to a wide variety of clients in the field of electrical measuring and control technology. Proximity to their customers through the use of local sales representatives, backed by highly experienced factory sales engineers allows them to react quickly to the needs of their customers providing a decisive advantage for professional users of their equipment.

  • Continues as a thriving business led by Chairman of the Board, Dr. W.E. Bulman
  • Owner of patented Hall-effect apparatus
  • Over 13,000 standard products used to measure electrical parameters
  • ISO 9001:2008 Certified since 2009
  • Wide range of products including UL Listed, ATEX Certified and RoHS compliant.
  • Highly experienced Engineering department available to customize and design products to meet customer specifications.
  • Technically trained Sales and Customer Support staff
  • NIST and ISO 17025 certification capabilities
  • Proud supplier to the United States Armed Forces
  • Long-term supplier to a wide variety of industries including Aerospace, Oil & Gas and systems integrators
  • Dedicated workforce striving to become 100% ESOP owned


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