High accuracy transducers, sensors, and transformers manufactured by Ohio Semitronics. Don't guess which electrical transducer would be best for your electrical measurement application. OSI can replace non-U.S devices with U.S. ones and OSI can replace obsolete parts. Customized electrical measurement devices specified specifically to your needs. Application Notes | White Papers | Spec Sheets | Product Manuals | Request For Quote | What Does OSI Do?